[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Adad, Carlos"]
[Black "Cox, David"]
[Result "0-1"]
[ECO "B87"]
[EventDate "1971.07.25"]
[PlyCount "82"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Be7 7.O-O a6 8.Bb3 b5
9.Re1 O-O 10.f4 Bb7 11.e5 dxe5 12.fxe5 Bc5 13.Be3 Nfd7 14.Bf2 Qb6 15.Ne4 
Bxe4 16.Rxe4 Nc6 17.c3 Ndxe5 18.Qh5 Ng6 19.Kh1 e5 20.Ne6 fxe6 21.Bxe6+ Rf7
22.Bxc5 Qxc5 23.Bxf7+ Kxf7 24.Qxh7 Qf2 25.Qh3 Nce7 26.Qd3 Qxb2 27.Rf1+ Kg8
28.Rg4 Rf8 29.Rb1 Qxa2 30.Rxg6 Nxg6 31.Qxg6 Qf7 32.Qd3 Qf5 33.Qd5+ Kh8 34.
Rg1 e4 35.Qd4 Qf4 36.h3 e3 37.Qd1 Qf2 38.Qh5+ Kg8 39.Qd5+ Rf7 40.Qd8+ Kh7 
41.Qd3+ g6 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Ogaard, Leif"]
[Black "Kaiszauri, Konstanty"]
[Result "1-0"]
[WhiteElo "2340"]
[ECO "E61"]
[EventDate "1971.07.25"]
[PlyCount "94"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Bf4 O-O 6.e3 Nh5 7.Bg5 h6 8.Bh4 g5 
9.Nd2 Nf6 10.Bg3 Nbd7 11.Be2 e5 12.O-O Ne8 13.dxe5 dxe5 14.Nf3 Nd6 15.e4 
Kh8 16.Nd2 b6 17.Bg4 f5 18.Bxf5 Nxf5 19.exf5 Rxf5 20.Nde4 Bb7 21.Qg4 Rf7 
22.Rad1 Qe7 23.Nd5 Bxd5 24.Rxd5 c6 25.Rd2 Nf8 26.Rd6 Rd8 27.Rfd1 Ne6 28.
Rxd8+ Nxd8 29.h4 Ne6 30.Rd6 Nc5 31.Rxc6 Nxe4 32.Qxe4 Rf8 33.hxg5 hxg5 34.
b3 Qd7 35.Qg6 Rd8 36.Qh5+ Kg8 37.Rg6 Qd1+ 38.Qxd1 Rxd1+ 39.Kh2 Kf7 40.Rxg5
Rd2 41.Bxe5 Bxe5+ 42.Rxe5 Rxf2 43.a4 Rb2 44.Re3 Kf6 45.Kg3 Kf5 46.Kf3 Rb1 
47.g4+ Kg5 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Vaganian, Rafael"]
[Black "Jamieson, Robert Murray"]
[Result "1-0"]
[WhiteElo "2510"]
[ECO "E68"]
[EventDate "1971.07.25"]
[PlyCount "85"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nbd7 7.O-O e5 8.e4 Re8 
9.Re1 Qe7 10.h3 c6 11.Be3 Nf8 12.Qd2 exd4 13.Nxd4 Ne6 14.Rad1 Nxd4 15.Bxd4
Be6 16.b3 Rad8 17.Nd5 Bxd5 18.exd5 Qc7 19.dxc6 bxc6 20.Bc3 Rxe1+ 21.Rxe1 
Qd7 22.Rd1 Ne8 23.Ba5 Rc8 24.h4 f5 25.h5 Be5 26.Qe3 Qf7 27.hxg6 hxg6 28.c5
f4 29.gxf4 Qxf4 30.Qxf4 Bxf4 31.Bh3 Rb8 32.cxd6 Bxd6 33.Rxd6 Nxd6 34.Bc7 
Re8 35.Bxd6 Kf7 36.Bc5 Re5 37.Be3 c5 38.Bf1 Kf6 39.Kg2 g5 40.b4 Rxe3 41.
fxe3 cxb4 42.Kf3 Ke5 43.Bd3 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Bellin, Robert"]
[Black "Ogaard, Leif"]
[Result "1/2-1/2"]
[BlackElo "2340"]
[ECO "B57"]
[EventDate "1971.07.25"]
[PlyCount "90"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Qb6 7.Nb3 e6 8.O-O 
Be7 9.Be3 Qc7 10.f4 O-O 11.Bd3 a6 12.Qf3 Rb8 13.g4 d5 14.e5 Nd7 15.Qh3 g6 
16.Qh6 Re8 17.Rf3 Bf8 18.Qh4 Qd8 19.g5 h5 20.Ne2 Bg7 21.Rff1 b6 22.c3 Bb7 
23.Qf2 Rc8 24.Bd4 Ne7 25.a4 a5 26.Bb5 Bc6 27.Ba6 Ra8 28.Bd3 Qc7 29.Ng3 
Rec8 30.Be3 Bb7 31.Nd4 Nc5 32.Bc2 Ba6 33.Rfd1 Nc6 34.Nge2 Bxe2 35.Qxe2 
Nxd4 36.Bxd4 Bf8 37.Qe3 Rab8 38.Ra2 Nd7 39.Bd3 Bc5 40.Raa1 Bxd4 41.cxd4 
Qb7 42.Rdc1 Rxc1+ 43.Rxc1 Rc8 44.Bb5 Nb8 45.Rc3 Nc6 1/2-1/2

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Jamieson, Robert Murray"]
[Black "Adad, Carlos"]
[Result "1-0"]
[ECO "B22"]
[EventDate "1971.07.25"]
[PlyCount "95"]

1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 e6 5.d4 cxd4 6.cxd4 d6 7.Bd3 Nb4 8.Bb5+ 
Bd7 9.Bxd7+ Qxd7 10.O-O N8c6 11.Qe2 dxe5 12.dxe5 Qd3 13.Nc3 Qxe2 14.Nxe2 
Nd3 15.Bf4 Bc5 16.Rab1 f6 17.exf6 gxf6 18.Bg3 e5 19.Nc3 Kf7 20.Ne1 Rad8 
21.Nxd3 Rxd3 22.Rfd1 Rhd8 23.Rxd3 Rxd3 24.Kf1 Ke6 25.Rd1 Rxd1+ 26.Nxd1 Nb4
27.a3 Nd3 28.Ke2 e4 29.f3 f5 30.fxe4 fxe4 31.b4 Nxb4 32.axb4 Bxb4 33.Ke3 
Kd5 34.Bh4 a5 35.Bf6 Bc5+ 36.Kf4 Bd4 37.Ne3+ Bxe3+ 38.Kxe3 b5 39.g4 b4 40.
h4 a4 41.g5 b3 42.Bb2 Kc4 43.Kxe4 Kb4 44.Kd3 a3 45.Bc3+ Kc5 46.h5 Kd5 47.
g6 hxg6 48.h6 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Kaiszauri, Konstanty"]
[Black "Vaganian, Rafael"]
[Result "0-1"]
[BlackElo "2510"]
[ECO "C18"]
[EventDate "1971.07.25"]
[PlyCount "76"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.a3 Bxc3+ 6.bxc3 c5 7.Qg4 O-O 8.Nf3 
Nbc6 9.Bd3 f5 10.exf6 Rxf6 11.Bg5 Rf7 12.Ne5 Nxe5 13.dxe5 Qc7 14.f4 c4 15.
Be2 Nf5 16.Qh3 h6 17.Bh4 Nxh4 18.Qxh4 Qb6 19.Qg3 Bd7 20.Bh5 Rff8 21.Ke2 
Be8 22.Bxe8 Raxe8 23.Qe3 Qc7 24.g3 b6 25.a4 Rc8 26.Rhb1 Qf7 27.h4 Qf5 28.
Ra2 Rc5 29.Kd2 Rd8 30.Kc1 Ra5 31.Rb5 Qe4 32.Kd2 Qg2+ 33.Kc1 Rxb5 34.axb5 
Rd7 35.Kb2 Rc7 36.Qc1 d4 37.cxd4 c3+ 38.Ka1 Qd2 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Adad, Carlos"]
[Black "Kaiszauri, Konstanty"]
[Result "0-1"]
[ECO "C78"]
[EventDate "1971.07.25"]
[PlyCount "62"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.d4 Nxd4 8.Nxd4 
exd4 9.c3 Bxe4 10.Re1 Be7 11.Bg5 Bg6 12.Bxf6 gxf6 13.Qe2 d3 14.Qe3 Kf8 15.
Nd2 c6 16.a4 b4 17.a5 d5 18.Ba4 Rc8 19.Nf3 Bd6 20.Nd4 Qd7 21.Qh6+ Kg8 22.
Rac1 Qg4 23.Nxc6 Qg5 24.Qxg5 fxg5 25.Red1 bxc3 26.Rxc3 Kg7 27.Bb3 Rhe8 28.
Bxd5 Re2 29.b3 Rce8 30.Kf1 d2 31.Re3 Bd3 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Cox, David"]
[Black "Jamieson, Robert Murray"]
[Result "1/2-1/2"]
[ECO "E61"]
[EventDate "1971.07.25"]
[PlyCount "55"]

1.c4 Nf6 2.Nf3 g6 3.d4 Bg7 4.Nc3 O-O 5.Bg5 c5 6.e3 d6 7.Be2 Qa5 8.O-O Bg4 
9.Bh4 Nbd7 10.h3 Bxf3 11.Bxf3 Rab8 12.a3 a6 13.Rb1 Qc7 14.Be2 Rfd8 15.b4 
b5 16.bxc5 bxc4 17.Bxc4 Rxb1 18.Qxb1 dxc5 19.Qb3 cxd4 20.exd4 e6 21.Bxa6 
Qd6 22.Bb5 Qxd4 23.Bg5 Rc8 24.Ne2 Qb6 25.Rc1 Rxc1+ 26.Bxc1 Nc5 27.Be3 Nd5 
28.Bxc5 1/2-1/2

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Vaganian, Rafael"]
[Black "Bellin, Robert"]
[Result "1-0"]
[WhiteElo "2510"]
[ECO "E51"]
[EventDate "1971.07.25"]
[PlyCount "91"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 Nc6 7.O-O a6 8.a3 dxc4 
9.Bxc4 Bd6 10.e4 e5 11.d5 Ne7 12.Re1 Ng6 13.Bf1 h6 14.h3 Nh7 15.Be3 Nh4 
16.Nxh4 Qxh4 17.Rc1 f5 18.exf5 Bxf5 19.Ne2 Qe7 20.Ng3 Bg6 21.Qb3 b6 22.Rc4
Nf6 23.Rd1 e4 24.Be2 Kh8 25.Rc6 Nd7 26.Bd4 Qg5 27.Qc3 Rf7 28.Bg4 Raf8 29.
Be6 Re7 30.Rxc7 Bxc7 31.Qxc7 Nc5 32.Qxb6 Nxe6 33.dxe6 Rfe8 34.Be3 Qe5 35.
Qxa6 Qxb2 36.Rd7 Rxe6 37.Qa7 Qb8 38.Rxg7 Qxa7 39.Rxa7 h5 40.Ra5 h4 41.Nh5 
Kh7 42.Nf4 R6e7 43.Rg5 Rg8 44.Rg4 Rgg7 45.Bd4 Rgf7 46.Nxg6 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Bellin, Robert"]
[Black "Adad, Carlos"]
[Result "1-0"]
[ECO "B48"]
[EventDate "1971.07.25"]
[PlyCount "121"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Bd3 Nc6 7.Be3 Nf6 8.O-O 
Ne5 9.h3 Bc5 10.Qe2 d6 11.f4 Ng6 12.Nb3 Bxe3+ 13.Qxe3 b5 14.a3 Qa7 15.Qxa7
Rxa7 16.Na5 O-O 17.a4 b4 18.Na2 d5 19.Rae1 Bd7 20.Nxb4 dxe4 21.Bxe4 Nxe4 
22.Rxe4 Bxa4 23.b3 Bd7 24.Rd1 Rc8 25.Red4 Be8 26.c4 Kf8 27.Rd8 Rxd8 28.
Rxd8 Nxf4 29.Rd6 Ke7 30.Rxa6 Rd7 31.c5 Rd2 32.Ra7+ Kf6 33.c6 Rxg2+ 34.Kf1 
h5 35.Nd3 Rg3 36.Nxf4 Rf3+ 37.Ke2 Rxf4 38.Ra8 Ke7 39.c7 Bd7 40.c8=Q Bxc8 
41.Rxc8 g5 42.Rc4 Rf5 43.b4 Kd7 44.Nb3 Re5+ 45.Kd3 f5 46.Rd4+ Kc7 47.Nc5 
g4 48.hxg4 hxg4 49.Kc4 g3 50.Rd7+ Kc8 51.Rg7 f4 52.Kb5 f3 53.Kc6 Kd8 54.
Nb7+ Ke8 55.Nd6+ Kf8 56.Rf7+ Kg8 57.Rxf3 Rg5 58.Rf1 g2 59.Rg1 Kg7 60.b5 
Kh6 61.Nf7+ 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Kaiszauri, Konstanty"]
[Black "Cox, David"]
[Result "0-1"]
[ECO "B89"]
[EventDate "1971.07.25"]
[PlyCount "64"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3 Be7 8.Qe2 
O-O 9.O-O-O Qc7 10.Bb3 a6 11.Rhg1 b5 12.g4 b4 13.Nxc6 Qxc6 14.Nd5 exd5 15.
g5 Qc7 16.gxf6 Bxf6 17.Bxd5 Rb8 18.Qh5 Be6 19.Rxg7+ Bxg7 20.Rg1 Rfc8 21.c3
bxc3 22.b3 Bxd5 23.Bh6 f5 24.Bxg7 Qxg7 25.Rxg7+ Kxg7 26.Qg5+ Kh8 27.Qf6+ 
Kg8 28.exd5 Re8 29.Qg5+ Kh8 30.Qf6+ Kg8 31.Qxd6 Rbc8 32.Qd7 c2 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Ogaard, Leif"]
[Black "Vaganian, Rafael"]
[Result "0-1"]
[WhiteElo "2340"]
[BlackElo "2510"]
[ECO "E55"]
[EventDate "1971.07.25"]
[PlyCount "128"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
Nbd7 9.Qe2 b6 10.Rd1 cxd4 11.exd4 Bxc3 12.bxc3 Qc7 13.Ba3 Re8 14.Ne5 Bb7 
15.Nxd7 Qxd7 16.Rac1 Rec8 17.Bb5 Qd5 18.f3 a6 19.Bd3 b5 20.Kh1 Qg5 21.Be7 
Bd5 22.c4 bxc4 23.Bxc4 Bxc4 24.Rxc4 Rxc4 25.Qxc4 Qd5 26.Qc2 Re8 27.Bxf6 
gxf6 28.Qa4 Rc8 29.Qxa6 Ra8 30.Qb6 Rxa2 31.Qb8+ Kg7 32.Qg3+ Qg5 33.Qxg5+ 
fxg5 34.h4 gxh4 35.d5 h3 36.gxh3 e5 37.d6 Ra8 38.Kg2 Kf6 39.Kg3 Ke6 40.Kg4
Ra4+ 41.Kg3 Rd4 42.Ra1 h5 43.h4 Rxd6 44.Ra8 Kf5 45.Rh8 Rg6+ 46.Kf2 Kf4 47.
Ra8 Rd6 48.Ra4+ Rd4 49.Ra2 f5 50.Rb2 Rc4 51.Ra2 Rc3 52.Ra4+ e4 53.fxe4 
fxe4 54.Ra5 Rc2+ 55.Kf1 Kf3 56.Rf5+ Kg4 57.Re5 Rc4 58.Rg5+ Kxh4 59.Rg8 Kh3
60.Kf2 h4 61.Rg7 Rc3 62.Re7 Rf3+ 63.Ke2 Kg2 64.Rxe4 h3 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Adad, Carlos"]
[Black "Ogaard, Leif"]
[Result "0-1"]
[BlackElo "2340"]
[ECO "B88"]
[EventDate "1971.07.25"]
[PlyCount "90"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Bb3 Be7 8.O-O 
O-O 9.Kh1 Na5 10.f4 b6 11.Qd3 Bb7 12.f5 e5 13.Nf3 Nxb3 14.axb3 h6 15.Rd1 
Qc7 16.Qe2 Bc6 17.Nd2 Rfd8 18.Nf1 Qb7 19.Ng3 a5 20.Bd2 Rdc8 21.Re1 b5 22.
Nd1 b4 23.Rc1 a4 24.bxa4 Rxa4 25.c3 bxc3 26.Nxc3 Rb4 27.Nd1 Ra4 28.Nc3 Rb4
29.Nd1 Rd4 30.Bc3 Ra4 31.Nf2 Re8 32.Ng4 Nxe4 33.Nh5 Bg5 34.Rcd1 Nxc3 35.
bxc3 Bxg2+ 36.Qxg2 Qxg2+ 37.Kxg2 Rxg4+ 38.Kf3 Rh4 39.Ng3 Rf4+ 40.Kg2 Bh4 
41.Rxd6 Bxg3 42.hxg3 Rxf5 43.c4 Rc8 44.Rc1 e4 45.Rd4 Re5 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Cox, David"]
[Black "Bellin, Robert"]
[Result "0-1"]
[ECO "A36"]
[EventDate "1971.07.25"]
[PlyCount "68"]

1.c4 c5 2.Nc3 g6 3.g3 Bg7 4.Bg2 Nc6 5.e3 e6 6.Nge2 Nge7 7.O-O Nf5 8.d3 b6 
9.a3 Bb7 10.Rb1 d6 11.b4 Qd7 12.Qb3 Rb8 13.Bb2 O-O 14.Rfd1 Ne5 15.e4 Nd4 
16.Nxd4 cxd4 17.Ne2 Nc6 18.Rbc1 e5 19.Rf1 Kh8 20.f4 f5 21.Qd1 Ne7 22.Qd2 
Rbc8 23.c5 bxc5 24.bxc5 dxc5 25.Qa5 fxe4 26.dxe4 c4 27.Rfd1 Qg4 28.Nxd4 
exd4 29.Bxd4 Bxd4+ 30.Rxd4 Nc6 31.Qc3 Nxd4 32.Qxd4+ Kg8 33.Bf1 Ba6 34.Qxa7
Qe6 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Jamieson, Robert Murray"]
[Black "Kaiszauri, Konstanty"]
[Result "1/2-1/2"]
[ECO "C68"]
[EventDate "1971.07.25"]
[PlyCount "78"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4 c5 8.
Ne2 Bd7 9.Nbc3 O-O-O 10.Bd2 Ne7 11.O-O-O Ng6 12.f3 Bd6 13.Nd5 f5 14.Nec3 
Be6 15.Bg5 Rde8 16.exf5 Bxf5 17.g4 Be6 18.Rhe1 Bxh2 19.Ne7+ Nxe7 20.Rxe6 
Ng6 21.Rxe8+ Rxe8 22.Rh1 Be5 23.Rxh7 Rf8 24.f4 Nxf4 25.Be7 Rf7 26.Bxc5 Ne6
27.Be3 Bxc3 28.bxc3 Kd7 29.Kd2 c5 30.Rh5 Kd6 31.c4 b6 32.Kd3 Rf1 33.Rd5+ 
Ke7 34.Ke4 Ra1 35.Kf5 Rf1+ 36.Ke4 g6 37.Re5 Kd6 38.Rd5+ Ke7 39.Re5 Kd6 
1/2-1/2

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Bellin, Robert"]
[Black "Jamieson, Robert Murray"]
[Result "0-1"]
[ECO "C10"]
[EventDate "1971.07.25"]
[PlyCount "172"]

1.e4 e6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Be7 5.Nf3 Nf6 6.Nxf6+ Bxf6 7.c3 Nd7 8.
Bf4 O-O 9.Bc4 a6 10.a4 b6 11.O-O Bb7 12.Qe2 Re8 13.Rfe1 Nf8 14.Bg3 Ng6 15.
Bd3 Nh4 16.Nxh4 Bxh4 17.Qh5 Bxg3 18.Qxh7+ Kf8 19.hxg3 Qg5 20.Be4 Bxe4 21.
Qxe4 Rad8 22.Qf4 Qxf4 23.gxf4 Rd5 24.Kf1 Red8 25.Re5 Ke7 26.Rae1 Kd6 27.b3
c6 28.Ke2 Rd7 29.Kf3 b5 30.axb5 axb5 31.Ra1 Rb7 32.Ke3 f6 33.Re4 Rh5 34.
Re1 f5 35.Re5 Rh6 36.Ra1 Rg6 37.g3 Rf6 38.Kd3 Rff7 39.Re2 g6 40.Rea2 Rh7 
41.Ra8 Rbd7 42.Ke3 Kd5 43.R8a5 Kd6 44.Kf3 Rb7 45.Ke3 Rbc7 46.Ra8 Rhd7 47.
Rg8 Ra7 48.Rb1 Ra2 49.Rxg6 Rc2 50.Kd3 Rxf2 51.Re1 Rf3+ 52.Kc2 Re7 53.Re5 
Kd7 54.Re2 Kd6 55.Kb2 Kd5 56.Re5+ Kd6 57.Rxf5 Ra7 58.c4 bxc4 59.bxc4 Rb7+ 
60.Kc2 Rf2+ 61.Kc1 Rh7 62.Rxe6+ Kxe6 63.Re5+ Kf6 64.Re1 Rhh2 65.d5 cxd5 
66.cxd5 Rc2+ 67.Kb1 Rcd2 68.g4 Rxd5 69.Rc1 Rb5+ 70.Ka1 Rb6 71.Rc8 Rd6 72.
g5+ Kf5 73.Rc1 Rhd2 74.Rc5+ Kxf4 75.Rb5 Rg2 76.Rb4+ Kxg5 77.Rb6 Rg1+ 78.
Rb1 Ra6+ 79.Kb2 Rb6+ 80.Kc3 Rbxb1 81.Kd3 Rg4 82.Kc3 Rh1 83.Kd3 Rh3+ 84.Ke2
Rg2+ 85.Kf1 Rhh2 86.Ke1 Rg1# 0-1

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Ogaard, Leif"]
[Black "Cox, David"]
[Result "1-0"]
[WhiteElo "2340"]
[ECO "D07"]
[EventDate "1971.07.25"]
[PlyCount "92"]

1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 4.cxd5 Bxf3 5.gxf3 Qxd5 6.e3 e6 7.Nc3 Bb4 8.Bd2
Bxc3 9.bxc3 Nf6 10.c4 Qd7 11.Rb1 Rb8 12.Bc3 O-O 13.Rg1 Ne7 14.Bd3 Rfd8 15.
Ke2 Ng6 16.Qc2 b6 17.Rg5 Qe7 18.Rbg1 Ne8 19.h4 Rd7 20.h5 Nf8 21.Be4 f6 22.
R5g2 c5 23.d5 e5 24.a4 Qd8 25.Rg4 Nd6 26.Bd3 Rf7 27.Kf1 Qd7 28.R1g3 a6 29.
f4 e4 30.Be2 b5 31.axb5 axb5 32.cxb5 c4 33.Rg1 Rxb5 34.Kg2 Rxd5 35.Rg3 Ne6
36.Qb2 Rb5 37.Qa1 Qe7 38.Kh2 Rb7 39.Rd1 Nc5 40.Qa8+ Rf8 41.Qa2 Qe6 42.f5 
Qe7 43.Bxc4+ Nxc4 44.Qxc4+ Kh8 45.h6 Rg8 46.Rd5 Rc7 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Vaganian, Rafael"]
[Black "Adad, Carlos"]
[Result "1-0"]
[WhiteElo "2510"]
[ECO "E69"]
[EventDate "1971.07.25"]
[PlyCount "75"]

1.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O e5 7.d4 Nbd7 8.e4 c6 
9.h3 exd4 10.Nxd4 Qb6 11.Nb3 Ne5 12.Be3 Qc7 13.Nd2 Be6 14.Qe2 Ned7 15.f4 
Nb6 16.a4 Rae8 17.a5 Nc8 18.Qf2 Qb8 19.c5 dxc5 20.Bxc5 b6 21.axb6 axb6 22.
Bxf8 Bxf8 23.Kh2 Bc5 24.Qf3 Nd7 25.e5 Ne7 26.Nde4 Nd5 27.Rfd1 Be7 28.Nxd5 
Bxd5 29.Qf1 Qc7 30.Rac1 Qb7 31.Nf2 Bc5 32.Bxd5 cxd5 33.Qg2 Bxf2 34.Qxf2 
Nc5 35.Rc2 Ne4 36.Qd4 Rd8 37.h4 b5 38.Re2 1-0

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Cox, David"]
[Black "Vaganian, Rafael"]
[Result "1/2-1/2"]
[BlackElo "2510"]
[ECO "D01"]
[EventDate "1971.07.25"]
[PlyCount "39"]

1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3 g6 5.e3 Bg7 6.Be2 O-O 7.O-O c6 8.h3 Re8
9.Bf4 b6 10.Ne5 Bb7 11.Bf3 Rc8 12.Qd3 Nf8 13.Rfd1 Ne6 14.Bh2 Ng5 15.Be2 c5
16.a4 c4 17.Qd2 Nfe4 18.Qe1 a6 19.Nxe4 Nxe4 20.c3 1/2-1/2

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Jamieson, Robert Murray"]
[Black "Ogaard, Leif"]
[Result "1/2-1/2"]
[BlackElo "2340"]
[ECO "B03"]
[EventDate "1971.07.25"]
[PlyCount "35"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.exd6 cxd6 5.Nf3 g6 6.c4 Nb6 7.Nc3 Bg7 8.Be3 
O-O 9.Rc1 Bg4 10.Be2 d5 11.cxd5 Nxd5 12.Qb3 Nxe3 13.fxe3 Bc8 14.O-O Nd7 
15.a4 b6 16.Bc4 e6 17.Nb5 Nf6 18.Ne5 1/2-1/2

[Event "11th World U20 ch prel. group 1"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Kaiszauri, Konstanty"]
[Black "Bellin, Robert"]
[Result "1-0"]
[ECO "B57"]
[EventDate "1971.07.25"]
[PlyCount "83"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Bd7 7.O-O e6 8.Be3 
Be7 9.f4 a6 10.Bb3 Qc7 11.f5 Nxd4 12.Bxd4 e5 13.Bf2 Bc6 14.Qd3 b5 15.Bh4 
b4 16.Bxf6 Bxf6 17.Nd5 Bxd5 18.Bxd5 Qb6+ 19.Kh1 Ra7 20.a3 O-O 21.axb4 Qxb4
22.b3 a5 23.Ra4 Qb6 24.Rfa1 Rb8 25.h3 Qf2 26.c3 Bg5 27.R4a2 Qe3 28.Qxe3 
Bxe3 29.Rxa5 Rxa5 30.Rxa5 Bd2 31.Ra7 Bxc3 32.Rxf7 Kh8 33.g4 Bd4 34.Rd7 Bc5
35.Kg2 h5 36.Kg3 hxg4 37.hxg4 Rc8 38.Kh4 Rf8 39.Kh5 Bb4 40.g5 Bd2 41.f6 
gxf6 42.g6 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Biriescu, Ioan"]
[Black "Hug, Werner"]
[Result "1-0"]
[ECO "B15"]
[EventDate "1971.07.25"]
[PlyCount "89"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4 Bd6 7.Qf3 O-O 8.
Ne2 Nd7 9.O-O Nb6 10.Bd3 Be6 11.b3 Qd7 12.h3 Rad8 13.c4 Nc8 14.Rd1 Ne7 15.
Be3 Rfe8 16.Rac1 Bf5 17.Bf4 g6 18.Bxd6 Qxd6 19.Nc3 Bxd3 20.Rxd3 f5 21.Rcd1
a6 22.d5 c5 23.Re1 f4 24.Ne4 Qe5 25.Rdd1 Nf5 26.Nxc5 Nd4 27.Qe4 Qf6 28.Nd7
Qd6 29.Qxd4 Qxd7 30.Qxf4 b6 31.Qf6 Qc7 32.d6 Qd7 33.Kf1 Re6 34.Rxe6 fxe6 
35.Ke2 Re8 36.Qd4 Rb8 37.Kf1 a5 38.a3 Rc8 39.Qxb6 a4 40.Qb4 axb3 41.Qxb3 
Rc5 42.Qb4 Rf5 43.c5 Qf7 44.Rd2 Qf6 45.Qd4 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Ipek, Ali"]
[Result "1-0"]
[ECO "B40"]
[EventDate "1971.07.25"]
[PlyCount "31"]

1.e4 c5 2.Nc3 e6 3.Nf3 Nc6 4.Be2 g6 5.d4 cxd4 6.Nxd4 Bg7 7.Ndb5 Be5 8.f4 
Bb8 9.Nd6+ Bxd6 10.Qxd6 a6 11.Be3 Nge7 12.O-O O-O 13.f5 exf5 14.exf5 gxf5 
15.Bh6 Re8 16.Nd5 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Rogoff, Kenneth"]
[Black "Roofthoofd, Marcel"]
[Result "1-0"]
[WhiteElo "2425"]
[ECO "A14"]
[EventDate "1971.07.25"]
[PlyCount "68"]

1.Nf3 Nf6 2.c4 e6 3.g3 b6 4.Bg2 Bb7 5.O-O Be7 6.b3 O-O 7.Bb2 d5 8.d3 c5 9.
e3 Nc6 10.Nc3 Qd7 11.Qe2 Rfd8 12.Rfd1 Rac8 13.Rac1 Bf8 14.d4 Qc7 15.cxd5 
exd5 16.Na4 Ne4 17.dxc5 bxc5 18.Ne1 Nb4 19.a3 Na6 20.b4 Qe7 21.Nxc5 Naxc5 
22.bxc5 Nxc5 23.Qg4 Ne4 24.Nd3 Rxc1 25.Rxc1 g6 26.f3 Nf6 27.Qd4 Bg7 28.
Qxa7 Ra8 29.Qc5 Qe8 30.Re1 Ba6 31.Nb4 Bc4 32.Qc6 Qd8 33.Bh3 Nh5 34.Bxg7 
Kxg7 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Cruz, Jorge"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "C99"]
[EventDate "1971.07.25"]
[PlyCount "60"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 
9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4 13.cxd4 Bb7 14.Nf1 Rac8 15.Bd3 
exd4 16.Nxd4 d5 17.exd5 Nxd5 18.Ne3 Nf4 19.Nef5 Bf6 20.Be4 Rfe8 21.Qf3 
Rxe4 22.Rxe4 Ng6 23.Bd2 Nc4 24.Bc3 Bxd4 25.Bxd4 Nd6 26.Nxd6 Qxd6 27.Qg4 
Rd8 28.Ree1 Qxd4 29.Re8+ Nf8 30.Qxd4 Rxd4 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Ipek, Ali"]
[Black "Rogoff, Kenneth"]
[Result "0-1"]
[BlackElo "2425"]
[ECO "D94"]
[EventDate "1971.07.25"]
[PlyCount "42"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Be2 c5 7.O-O cxd4 8.exd4 
Nc6 9.h3 b6 10.Bf4 Bb7 11.Rc1 dxc4 12.Bxc4 e6 13.Qd2 Ne7 14.Ne5 Nf5 15.
Rfd1 Rc8 16.f3 Nh5 17.Bg5 Qxd4+ 18.Qxd4 Nxd4 19.Rxd4 Bxe5 20.Rd7 Bc6 21.
Rxa7 b5 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Roofthoofd, Marcel"]
[Black "Biriescu, Ioan"]
[Result "0-1"]
[ECO "C29"]
[EventDate "1971.07.25"]
[PlyCount "32"]

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Nc6 6.d3 Nxc3 7.bxc3 d4 8.cxd4
Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 Nxd4 11.Be2 Nxf3+ 12.Bxf3 Qd4 13.Rb1 O-O 14.Qg5 
Re8 15.Kd2 Rxe5 16.Rhe1 Qf2+ 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Biriescu, Ioan"]
[Black "Ipek, Ali"]
[Result "1-0"]
[ECO "A04"]
[EventDate "1971.07.25"]
[PlyCount "51"]

1.e4 c5 2.Nf3 e6 3.d3 Nc6 4.g3 g6 5.Bg2 Bg7 6.O-O Nge7 7.Re1 O-O 8.c3 d5 
9.e5 Qc7 10.Bf4 b5 11.Nbd2 Bb7 12.Qc1 Rac8 13.h4 d4 14.Ne4 Nxe5 15.Nxe5 
Bxe5 16.Nf6+ Bxf6 17.Bxc7 Bxg2 18.Be5 Bxe5 19.Rxe5 Bd5 20.c4 bxc4 21.dxc4 
Nc6 22.Re1 d3 23.cxd5 Nd4 24.Qe3 d2 25.Red1 exd5 26.Rxd2 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Hug, Werner"]
[Black "Roofthoofd, Marcel"]
[Result "1-0"]
[ECO "A08"]
[EventDate "1971.07.25"]
[PlyCount "75"]

1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 c5 5.g3 Nc6 6.Bg2 Be7 7.O-O O-O 8.Re1 Qc7
9.e5 Nd7 10.Qe2 b5 11.h4 b4 12.Nf1 a5 13.Bf4 Ba6 14.Ne3 Nd4 15.Nxd4 cxd4 
16.Nxd5 exd5 17.e6 Bd6 18.Bxd6 Qxd6 19.exd7 Qxd7 20.Qe5 Rac8 21.Rac1 Qa4 
22.Bxd5 Rce8 23.Qf4 Rxe1+ 24.Rxe1 Qd7 25.Re5 Kh8 26.Qe4 f5 27.Qxd4 f4 28.
Rh5 Qd8 29.Qe4 h6 30.g4 Bc8 31.Qe5 Kh7 32.g5 Qd7 33.g6+ Kxg6 34.Be4+ Kf7 
35.Rf5+ Kg8 36.Bd5+ Kh7 37.Rxf8 Qg4+ 38.Bg2 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Rogoff, Kenneth"]
[Black "Cruz, Jorge"]
[Result "1-0"]
[WhiteElo "2425"]
[ECO "A12"]
[EventDate "1971.07.25"]
[PlyCount "79"]

1.Nf3 d5 2.c4 c6 3.b3 e6 4.Bb2 Nf6 5.g3 b6 6.Bg2 Bb7 7.O-O Nbd7 8.d3 Bd6 
9.Nc3 O-O 10.e3 Re8 11.Rc1 Rc8 12.Qe2 c5 13.Rfd1 Qe7 14.d4 dxc4 15.bxc4 
Red8 16.d5 exd5 17.cxd5 a6 18.a4 Ne5 19.Nh4 g6 20.f4 Neg4 21.e4 c4 22.Nf3 
Rc7 23.Nd4 Bc5 24.h3 Bxd4+ 25.Rxd4 Qc5 26.Qd2 Nh6 27.Kh2 b5 28.Na2 Bc8 29.
Bf3 Kf8 30.Qc3 Ke8 31.Rd2 Nhg8 32.Ba3 Qb6 33.a5 Qa7 34.Nb4 Re7 35.e5 Bd7 
36.Qd4 Qxd4 37.Rxd4 Bc8 38.Nc6 Rdd7 39.Nxe7 Nxe7 40.exf6 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Rogoff, Kenneth"]
[Result "0-1"]
[BlackElo "2425"]
[ECO "B83"]
[EventDate "1971.07.25"]
[PlyCount "88"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Nc6 7.O-O Be7 8.Be3 
O-O 9.Qd2 a6 10.a4 Qc7 11.Nxc6 bxc6 12.a5 c5 13.Bf3 Rb8 14.b3 Bb7 15.Rfe1 
Rfd8 16.Bf4 Nd7 17.Bg5 Ne5 18.Be2 Nc6 19.Bd3 f6 20.Bf4 Nxa5 21.Qe2 c4 22.
bxc4 Nc6 23.Be3 Bf8 24.Reb1 Rdc8 25.Qg4 Qf7 26.f4 g6 27.f5 Ne5 28.fxe6 Qe8
29.Qh3 Bc6 30.Rxb8 Rxb8 31.Bd4 Bg7 32.Rxa6 f5 33.Nb5 fxe4 34.Be2 Qc8 35.
Ra2 Qf8 36.c3 d5 37.Ra7 dxc4 38.Bxc4 Qf4 39.e7+ Kh8 40.Bf1 Re8 41.Qe6 Ng4 
42.g3 Bxd4+ 43.Kg2 Qf3+ 44.Kh3 Nf2+ 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Cruz, Jorge"]
[Black "Biriescu, Ioan"]
[Result "0-1"]
[ECO "C89"]
[EventDate "1971.07.25"]
[PlyCount "66"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 
9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 Nf6 12.Re1 Bd6 13.h3 Ng4 14.Qf3 Qh4 15.
Re8 Bb7 16.Rxf8+ Rxf8 17.Qxg4 Re8 18.Kf1 Qe7 19.Qd1 Be4 20.g3 Qd7 21.Qg4 
Bd3+ 22.Kg2 Qc6+ 23.Kh2 Re1 24.f3 Qc5 25.Qd4 Qxd4 26.cxd4 Rxc1 27.Bd5 Rxb1
28.Rxb1 Bxb1 29.a3 a5 30.f4 Bc2 31.Bc6 b4 32.a4 b3 33.Bb5 Ba3 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Ipek, Ali"]
[Black "Hug, Werner"]
[Result "0-1"]
[ECO "B02"]
[EventDate "1971.07.25"]
[PlyCount "90"]

1.e4 Nf6 2.Nc3 d5 3.e5 Ne4 4.Nxe4 dxe4 5.d4 exd3 6.Bxd3 g6 7.f4 Nc6 8.Nf3 
Bg4 9.Be3 Qd5 10.O-O Nb4 11.Qd2 Nxd3 12.cxd3 Bxf3 13.Rxf3 e6 14.Qc3 c6 15.
Qc4 Qa5 16.g4 O-O-O 17.a3 h5 18.g5 Rd5 19.Rf2 Be7 20.Rc2 Rhd8 21.Rc3 R8d7 
22.Rd1 Kb8 23.Kf2 Bd8 24.Rb3 Kc8 25.Ke2 Be7 26.Rc1 Kd8 27.Bd2 Qc7 28.Qa4 
a5 29.Be3 b5 30.Qe4 Qb7 31.Rbc3 Rc7 32.Qh1 b4 33.axb4 axb4 34.Rc4 Qb5 35.
Qe4 Rcd7 36.Rd1 Ke8 37.Rc2 Qa4 38.Qc4 c5 39.b3 Qc6 40.Qe4 Kf8 41.Ra2 Kg7 
42.Rc2 Qb5 43.Qc4 Qb7 44.Kf2 Rd4 45.Bxd4 Rxd4 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Biriescu, Ioan"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "C44"]
[EventDate "1971.07.25"]
[PlyCount "158"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5 5.exd5 Qxd5 6.cxd4 Bg4 7.Be2 O-O-O 8.
Nc3 Qd7 9.Be3 Bxf3 10.Bxf3 Nxd4 11.Bd5 c5 12.Bxd4 cxd4 13.Qxd4 Re8+ 14.Kf1
Kb8 15.Qf4+ Bd6 16.Qxf7 Ne7 17.Rd1 Rhf8 18.Qxg7 Qf5 19.Bf3 Bc5 20.Ne4 Bb6 
21.Qg5 Qe6 22.Qb5 Nc6 23.Nc5 Bxc5 24.Qxc5 Rxf3 25.Qd6+ Qxd6 26.Rxd6 Rf5 
27.g3 Ne5 28.f4 Nc4 29.Rd7 h5 30.Kf2 Ne5 31.Rd2 Ng4+ 32.Kf3 Rc5 33.Rhd1 
Ra5 34.h3 Re3+ 35.Kg2 Nf6 36.Kf2 Re7 37.Kf3 Rxa2 38.g4 hxg4+ 39.hxg4 Ra4 
40.g5 Ne8 41.Rd4 Ra5 42.Kg4 Ng7 43.Rd7 Nf5 44.Rxe7 Nxe7 45.Rd7 Nf5 46.Rf7 
Nd6 47.g6 Ra1 48.Kg5 Rg1+ 49.Kh6 Rh1+ 50.Kg7 Kc8 51.Kf6 Kd8 52.Rh7 Ne8+ 
53.Kf7 Rf1 54.Rh4 Kd7 55.Kf8 Nd6 56.g7 Re1 57.g8=Q Re8+ 58.Kg7 Nf5+ 59.Kf6
Rxg8 60.Kxf5 Rg2 61.Rh7+ Kc6 62.b3 Rg3 63.Rh6+ Kd5 64.b4 Rb3 65.Rh1 Rxb4 
66.Rd1+ Kc5 67.Ke5 Rb2 68.Rc1+ Kb4 69.f5 b5 70.Rf1 Rd2 71.f6 Rd8 72.f7 Rf8
73.Kd6 a5 74.Rf4+ Kb3 75.Kc5 b4 76.Kb5 Ka2 77.Kxa5 b3 78.Kb4 b2 79.Rf2 Ka1
0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Hug, Werner"]
[Black "Cruz, Jorge"]
[Result "1-0"]
[ECO "C48"]
[EventDate "1971.07.25"]
[PlyCount "87"]

1.e4 e5 2.Nc3 Nc6 3.Nf3 d6 4.Bb5 Nf6 5.d4 exd4 6.Qxd4 Bd7 7.Bxc6 Bxc6 8.
Bg5 Be7 9.O-O-O O-O 10.Rhe1 Nd7 11.Bxe7 Qxe7 12.Nd5 Bxd5 13.Qxd5 Qe6 14.
Nd4 Qxd5 15.exd5 a6 16.Re7 Rfd8 17.Rde1 Rac8 18.Nf5 Kf8 19.R7e3 g6 20.Ng3 
Re8 21.Ne4 h6 22.b3 Re5 23.c4 Rce8 24.Kd2 f5 25.Nc3 Rxe3 26.Rxe3 Ne5 27.
Ne2 g5 28.Nd4 Kg8 29.Rh3 Kg7 30.Ne6+ Kg6 31.Nxc7 Re7 32.Ne6 h5 33.f4 g4 
34.Re3 Kf6 35.fxe5+ dxe5 36.g3 h4 37.Nc5 Rh7 38.Nd3 hxg3 39.hxg3 Rh2+ 40.
Re2 Rh3 41.Rxe5 Rxg3 42.Re6+ Kf7 43.Ne5+ Kf8 44.Rf6+ 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Roofthoofd, Marcel"]
[Black "Ipek, Ali"]
[Result "1-0"]
[ECO "B48"]
[EventDate "1971.07.25"]
[PlyCount "57"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Bd3 Nc6 7.Be3 b5 8.a3 Bb7
9.O-O Nf6 10.Kh1 Be7 11.f4 d6 12.Qf3 h5 13.Qg3 O-O-O 14.Nxc6 Bxc6 15.a4 h4
16.Qf2 h3 17.g3 Ng4 18.Qf3 Nxe3 19.Qxe3 d5 20.axb5 d4 21.Qf3 dxc3 22.bxc6 
a5 23.Ba6+ Kb8 24.Qxc3 Bb4 25.Qc4 Qb6 26.c3 Bc5 27.b4 axb4 28.cxb4 Be7 29.
c7+ 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Hug, Werner"]
[Result "0-1"]
[ECO "B22"]
[EventDate "1971.07.25"]
[PlyCount "84"]

1.e4 c5 2.Nf3 Nc6 3.c3 Nf6 4.e5 Nd5 5.Bb5 g6 6.O-O Bg7 7.Re1 O-O 8.d4 Nc7 
9.Bxc6 dxc6 10.dxc5 Qxd1 11.Rxd1 Bg4 12.Re1 Ne6 13.b4 Bxf3 14.gxf3 Rfd8 
15.f4 Bh6 16.a4 Bxf4 17.Na3 Rd3 18.Bxf4 Nxf4 19.Rac1 Rad8 20.Nc4 Nd5 21.
Red1 Nxb4 22.Rxd3 Nxd3 23.Rd1 Rd5 24.a5 Nxc5 25.Rb1 Rd3 26.a6 Rxc3 27.Na5 
Nxa6 28.Nxb7 Nc7 29.Nd8 Ne6 30.Nxe6 fxe6 31.Rb7 a5 32.Rxe7 a4 33.Ra7 Rc5 
34.Rxa4 Rxe5 35.Ra7 h6 36.Rc7 c5 37.Kg2 Kf8 38.Kg3 Ke8 39.Rg7 c4 40.f4 Rc5
41.Rg8+ Kf7 42.Rc8 Rxc8 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Cruz, Jorge"]
[Black "Roofthoofd, Marcel"]
[Result "1/2-1/2"]
[ECO "A62"]
[EventDate "1971.07.25"]
[PlyCount "95"]

1.d4 Nf6 2.c4 e6 3.g3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.Bg2 Bg7 8.Nf3 O-O 
9.O-O Re8 10.Re1 Ne4 11.Nxe4 Rxe4 12.Nd2 Re8 13.e4 b5 14.Qc2 a5 15.Nf3 Bg4
16.h3 Bxf3 17.Bxf3 Nd7 18.Bg2 a4 19.Bd2 a3 20.Bc3 axb2 21.Bxb2 Bxb2 22.
Qxb2 b4 23.f4 Ra3 24.e5 Rxg3 25.Qf2 Ra3 26.e6 Nf8 27.f5 f6 28.Be4 Qe7 29.
Kh2 g5 30.Bf3 Rea8 31.Bh5 b3 32.Bf7+ Kg7 33.Re2 c4 34.h4 h6 35.hxg5 hxg5 
36.Qd4 Rxa2 37.Raxa2 Rxa2 38.Qxc4 Qa7 39.Bg6 Rxe2+ 40.Qxe2 Qe7 41.Qb5 Qa7 
42.Qe2 Qe7 43.Kg3 Kh8 44.Bf7 Kg7 45.Bh5 Kh6 46.Bf7 Kg7 47.Kg2 Nd7 48.Qh5 
1/2-1/2

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Rogoff, Kenneth"]
[Black "Biriescu, Ioan"]
[Result "1-0"]
[WhiteElo "2425"]
[ECO "E67"]
[EventDate "1971.07.25"]
[PlyCount "63"]

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.O-O O-O 6.d4 c6 7.Nc3 Nbd7 8.Qc2 e5 
9.Rd1 Qe7 10.e4 Rd8 11.h3 exd4 12.Nxd4 Nb6 13.Qe2 Be6 14.b3 d5 15.cxd5 
cxd5 16.Bg5 dxe4 17.Nxe4 Nbd5 18.Nxe6 fxe6 19.Re1 Kf7 20.Rac1 Rac8 21.Rxc8
Rxc8 22.Nxf6 Nxf6 23.Bxb7 Rc5 24.Be3 Re5 25.Bg2 Nd5 26.Qf3+ Rf5 27.Qg4 Bc3
28.Rc1 Be5 29.Qa4 Bb8 30.Qd4 Qd7 31.Qh8 Be5 32.Qxh7+ 1-0

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Hug, Werner"]
[Black "Rogoff, Kenneth"]
[Result "1/2-1/2"]
[BlackElo "2425"]
[ECO "C26"]
[EventDate "1971.07.25"]
[PlyCount "19"]

1.e4 e5 2.Nc3 Nf6 3.Nf3 Bb4 4.Bc4 O-O 5.O-O Bxc3 6.dxc3 d6 7.Re1 h6 8.h3 
Nbd7 9.b4 b6 10.Bd5 1/2-1/2

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Ipek, Ali"]
[Black "Cruz, Jorge"]
[Result "0-1"]
[ECO "C44"]
[EventDate "1971.07.25"]
[PlyCount "86"]

1.e4 e5 2.Nf3 Nc6 3.d3 Nf6 4.g3 d6 5.Bg2 Be7 6.O-O Bg4 7.Be3 Qd7 8.Nbd2 h6
9.c3 d5 10.exd5 Nxd5 11.Nc4 Bf6 12.Re1 O-O 13.Qa4 Nb6 14.Bxb6 axb6 15.Qc2 
Rfe8 16.b4 b5 17.Ne3 Be6 18.h4 Ra3 19.Nd2 Rea8 20.Ne4 Be7 21.Qe2 b6 22.Qh5
Rxa2 23.Rxa2 Rxa2 24.g4 f6 25.g5 Bf7 26.g6 Be6 27.Ng3 Nd8 28.Ngf5 Bf8 29.
Be4 Ra3 30.Ng4 Bxf5 31.Bxf5 Qe7 32.Ne3 Ne6 33.Nd5 Qd6 34.Qg4 Nd8 35.Be4 
Kh8 36.Re3 c5 37.Rf3 Ra7 38.Ne3 cxb4 39.cxb4 Qxb4 40.Kg2 Qe7 41.Qh5 Ne6 
42.Nd5 Qd6 43.Qf5 Nd4 0-1

[Event "11th World U20 ch prel. group 2"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Roofthoofd, Marcel"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "C29"]
[EventDate "1971.07.25"]
[PlyCount "86"]

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Bc5 6.d4 Bb4 7.Bd2 Nxd2 8.Qxd2
Bf5 9.Bd3 Bxd3 10.Qxd3 O-O 11.O-O a6 12.Ne2 Nc6 13.Ng3 Ne7 14.c3 Ba5 15.
Ng5 Ng6 16.h4 c5 17.Qf5 cxd4 18.h5 dxc3 19.hxg6 hxg6 20.Qg4 Bb6+ 21.Kh1 
Be3 22.Nh3 c2 23.e6 Qc8 24.Nf4 fxe6 25.Nxg6 Rxf1+ 26.Rxf1 c1=Q 27.Ne7+ Kh8
28.Nxc8 Qxc8 29.Nh5 Qg8 30.Rf3 Bh6 31.Rh3 Rf8 32.Nf4 Rf6 33.Ng6+ Kh7 34.
Ne5 Qc8 35.Qe2 Qc1+ 36.Kh2 Rf1 37.Nd3 Rh1+ 38.Kg3 Qg5+ 39.Kf2 Rxh3 40.gxh3
Qf5+ 41.Kg2 d4 42.Qf3 Qg5+ 43.Kf1 b6 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "De Villiers, Charles"]
[Black "Gatt, Anthony"]
[Result "1-0"]
[ECO "C21"]
[EventDate "1971.07.25"]
[PlyCount "63"]

1.e4 e5 2.d4 exd4 3.c3 Nc6 4.cxd4 d5 5.exd5 Qxd5 6.Be3 Nf6 7.Nc3 Bb4 8.Nf3
Ne4 9.Qc2 Bf5 10.Bd3 Nxc3 11.bxc3 Bxd3 12.Qxd3 Bd6 13.O-O O-O 14.Rfb1 Nd8 
15.Ng5 g6 16.c4 Qc6 17.d5 Qd7 18.Bd4 f6 19.Ne4 Qf5 20.Rb3 Be5 21.Re1 b6 
22.Qd2 Bxd4 23.Qxd4 Qe5 24.Qxe5 fxe5 25.Ng5 Rf4 26.Rxe5 Rxc4 27.Re8+ Kg7 
28.g3 Kf6 29.h4 Kg7 30.Rf3 Ra4 31.Re7+ Kg8 32.Nxh7 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Haigh, Geoff"]
[Black "Rosenberg, Michael"]
[Result "1-0"]
[ECO "D92"]
[EventDate "1971.07.25"]
[PlyCount "51"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O-O 6.cxd5 Nxd5 7.Nxd5 Qxd5 8.
Bxc7 Na6 9.Bg3 Bf5 10.a3 Rac8 11.e3 Rc2 12.Bd3 Bxd3 13.Qxd3 Qa5+ 14.Nd2 
Nb4 15.Qe2 Nd5 16.b4 Nxb4 17.O-O Nd5 18.Nb3 Qc3 19.Qb5 e6 20.Qxb7 Bh6 21.
Rab1 a5 22.Bd6 Rd8 23.Nc5 Rxd6 24.Qc8+ Kg7 25.Rb8 Kf6 26.Ne4+ 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Herzog, Adolf"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[BlackElo "2440"]
[ECO "B89"]
[EventDate "1971.07.25"]
[PlyCount "84"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Bb3 Be7 8.Be3 
O-O 9.Qe2 a6 10.O-O-O Qc7 11.h4 Nd7 12.g4 Nc5 13.g5 b5 14.Rdg1 b4 15.Nxc6 
Nxb3+ 16.axb3 Qxc6 17.Na4 Qxe4 18.Rh2 a5 19.Rg4 Ba6 20.Qd1 Qe5 21.Rh3 Rac8
22.h5 Rc6 23.g6 fxg6 24.hxg6 h6 25.Nb6 Rxb6 26.Bxb6 Be2 27.Qd4 Bxg4 28.
Qxg4 Qe1+ 29.Qd1 Bg5+ 30.Be3 Bxe3+ 31.Rxe3 Qxd1+ 32.Kxd1 Rf6 33.Rd3 d5 34.
c4 bxc3 35.bxc3 Rxg6 36.Rd4 Rg1+ 37.Kc2 Kf7 38.Ra4 Rf1 39.Rxa5 Rxf2+ 40.
Kd3 h5 41.c4 Rf3+ 42.Kc2 dxc4 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Poutiainen, Pertti"]
[Black "Makropoulos, Georgios"]
[Result "1-0"]
[ECO "B35"]
[EventDate "1971.07.25"]
[PlyCount "73"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 O-O 8.f3 
Qb6 9.Bb3 Nxe4 10.fxe4 Bxd4 11.Bxd4 Qxd4 12.Qxd4 Nxd4 13.O-O-O Nxb3+ 14.
axb3 f6 15.Rd4 b6 16.Kd2 d6 17.Ra1 Rf7 18.Nd5 Bb7 19.Rda4 f5 20.Rxa7 Rb8 
21.Ke3 fxe4 22.Nxb6 e6 23.Nc4 Rd8 24.Rd1 d5 25.Ne5 Rc7 26.c4 Ra8 27.Rda1 
Rac8 28.c5 Bc6 29.Rxc7 Rxc7 30.Nxc6 Rxc6 31.b4 Kf7 32.b5 Rc8 33.c6 Ke7 34.
Ra7+ Kf6 35.c7 Ke7 36.b6 Kd7 37.b7 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Gatt, Anthony"]
[Black "Haigh, Geoff"]
[Result "0-1"]
[ECO "B23"]
[EventDate "1971.07.25"]
[PlyCount "60"]

1.e4 c5 2.f4 e6 3.Nc3 d5 4.Bb5+ Bd7 5.Bxd7+ Qxd7 6.exd5 exd5 7.Qe2+ Be7 8.
Nf3 Nf6 9.O-O O-O 10.d3 a6 11.a4 Bd6 12.Qf2 Nc6 13.b3 Rfe8 14.Bd2 d4 15.
Nb1 Ng4 16.Qh4 Ne3 17.Bxe3 dxe3 18.Ne1 Nd4 19.Kh1 Be7 20.Qg3 Bf6 21.c3 
Nxb3 22.Ra2 Nc1 23.Rc2 Nxd3 24.Nxd3 Qxd3 25.Rcc1 Rad8 26.Rfe1 Qc4 27.Qf3 
e2 28.Qg4 Qe4 29.h4 Re6 30.Kh2 Bxh4 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Herzog, Adolf"]
[Black "Poutiainen, Pertti"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1971.07.25"]
[PlyCount "60"]

1.Nc3 g6 2.e4 Bg7 3.f4 d6 4.Bc4 Nc6 5.Nf3 Nh6 6.h3 O-O 7.O-O Na5 8.Bb3 c5 
9.d3 Rb8 10.Qe1 e6 11.f5 Nxb3 12.axb3 exf5 13.Rxa7 Re8 14.Nd5 fxe4 15.dxe4
Nf5 16.exf5 Rxe1 17.Rxe1 Bxf5 18.Bg5 Qd7 19.Re7 Qb5 20.c4 Qxb3 21.Raxb7 
Qxb7 22.Rxb7 Rxb7 23.Be7 Be4 24.Bxd6 Bxf3 25.gxf3 Bd4+ 26.Kg2 Rxb2+ 27.Kg3
Rc2 28.Nb6 Kg7 29.Kf4 Rb2 30.Nd7 Rb4 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Makropoulos, Georgios"]
[Black "De Villiers, Charles"]
[Result "1-0"]
[ECO "B24"]
[EventDate "1971.07.25"]
[PlyCount "61"]

1.e4 e6 2.d3 c5 3.g3 g6 4.Bg2 Bg7 5.Nc3 Nc6 6.Nge2 Nge7 7.Be3 d6 8.O-O O-O
9.Qd2 Nd4 10.f4 Rb8 11.a4 a6 12.Nd1 Bd7 13.Nc1 b5 14.c3 Ndc6 15.axb5 axb5 
16.e5 dxe5 17.Bxc5 Re8 18.fxe5 Nxe5 19.Qf2 f5 20.d4 Ng4 21.Qe2 Nd5 22.Nd3 
Bh6 23.Re1 Bc6 24.Bf3 Ra8 25.Rxa8 Bxa8 26.Bxg4 fxg4 27.Qxg4 Nf6 28.Qh3 Qd5
29.N1f2 Ng4 30.Ne4 Qf5 31.Qxg4 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Ribli, Zoltan"]
[Black "Rosenberg, Michael"]
[Result "1-0"]
[WhiteElo "2440"]
[ECO "B20"]
[EventDate "1971.07.25"]
[PlyCount "57"]

1.e4 e6 2.d3 c5 3.g3 Nc6 4.Bg2 g6 5.f4 d6 6.Nf3 Bg7 7.O-O Nge7 8.c3 O-O 9.
Be3 f5 10.Nbd2 Rb8 11.Qe2 b5 12.Bf2 b4 13.Rfc1 bxc3 14.bxc3 Qd7 15.Nc4 Ba6
16.e5 Bxc4 17.dxc4 dxe5 18.fxe5 Qc7 19.Ng5 Nd8 20.Rd1 Rb6 21.Qe3 Bxe5 22.
Qxc5 Nec6 23.Rd3 Bf6 24.Rxd8 Qxd8 25.Nxe6 Be7 26.Nxd8 Bxc5 27.Bd5+ Kh8 28.
Bxc5 Nxd8 29.Bxf8 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "De Villiers, Charles"]
[Black "Herzog, Adolf"]
[Result "0-1"]
[ECO "C02"]
[EventDate "1971.07.25"]
[PlyCount "91"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 a5 7.Bd3 Bd7 8.O-O cxd4 9.
cxd4 Nxd4 10.Nxd4 Qxd4 11.Nc3 Rc8 12.Re1 Qb6 13.Bd2 Bc5 14.Re2 Ne7 15.Na4 
Bxa4 16.Qxa4+ Nc6 17.Qg4 Qb3 18.Qg3 Bd4 19.Rf1 Nxe5 20.Rxe5 Bxe5 21.Qxe5 
Qxd3 22.Qxg7 Rf8 23.Bxa5 Qg6 24.Qd4 Rg8 25.g3 Qc2 26.Bb4 Qc7 27.Qh4 f5 28.
Re1 Qf7 29.Qd4 Rd8 30.Qb6 Rg6 31.Rc1 e5 32.Qb5+ Qd7 33.Qc5 Kf7 34.Re1 Rc8 
35.Qe3 Re8 36.Qb3 Ree6 37.Rc1 Rc6 38.Rd1 Ke6 39.a4 Rg4 40.Ba3 Re4 41.Qf3 
Qg7 42.Qh5 Qg6 43.Qf3 Qg4 44.Qb3 Rec4 45.Rf1 Qg7 46.Rd1 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Haigh, Geoff"]
[Black "Makropoulos, Georgios"]
[Result "1-0"]
[ECO "B22"]
[EventDate "1971.07.25"]
[PlyCount "69"]

1.d4 e6 2.e4 c5 3.c3 d5 4.exd5 exd5 5.Nf3 Nc6 6.Be3 cxd4 7.Nxd4 Nf6 8.Be2 
Bd6 9.Nd2 O-O 10.O-O Re8 11.h3 Qe7 12.Re1 Ne4 13.N4f3 a6 14.Qb3 Rd8 15.Bd3
Ne5 16.Bxe4 dxe4 17.Bg5 Nxf3+ 18.Nxf3 Qf8 19.Bxd8 exf3 20.Rad1 Bc5 21.Bc7 
Be6 22.Qxb7 fxg2 23.b4 Be7 24.Bd6 Bxd6 25.Rxd6 Bxh3 26.Qxa8 Qxa8 27.Red1 
Qf8 28.Rd8 Be6 29.Rxf8+ Kxf8 30.a4 Bb3 31.Rd6 Bxa4 32.Rxa6 Bb5 33.Rd6 Ke7 
34.Rd4 Bf1 35.c4 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Poutiainen, Pertti"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[BlackElo "2440"]
[ECO "B88"]
[EventDate "1971.07.25"]
[PlyCount "68"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3 Be7 8.Bb3 
O-O 9.O-O Na5 10.f4 b6 11.Qf3 Bb7 12.g4 Rc8 13.g5 Rxc3 14.gxf6 Rxe3 15.
Qxe3 Bxf6 16.Rad1 Qe7 17.Rf2 g6 18.Nb5 Bxb2 19.c3 Bc6 20.Rxb2 Bxb5 21.e5 
dxe5 22.fxe5 Bc6 23.Rbd2 Nb7 24.Rd4 Nc5 25.Rf1 Nd7 26.Rd6 Ba8 27.Bd1 Rc8 
28.Bf3 Bxf3 29.Rxf3 Rc5 30.Rf1 Nxe5 31.Rfd1 Kg7 32.Rd8 Qf6 33.Kh1 Ng4 34.
Qd4 Nf2+ 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Rosenberg, Michael"]
[Black "Gatt, Anthony"]
[Result "1/2-1/2"]
[ECO "C64"]
[EventDate "1971.07.25"]
[PlyCount "68"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 f5 5.d4 fxe4 6.Nxe5 Nxe5 7.dxe5 c6 8.Bc4 
Qh4 9.Qe2 e3 10.Bxe3 Bxe3 11.Bxg8 Bxf2+ 12.Qxf2 Qxf2+ 13.Kxf2 Rxg8 14.Na3 
b5 15.Ke3 Kd8 16.Rhf1 Re8 17.Kd4 Bb7 18.Rf7 c5+ 19.Kxc5 Rxe5+ 20.Kd4 Rg5 
21.Re1 Rd5+ 22.Ke3 Kc7 23.Re2 Re8+ 24.Kf2 Rxe2+ 25.Kxe2 Rg5 26.g3 a6 27.b3
Rh5 28.h4 g5 29.Rf5 h6 30.Ke3 d6 31.c4 Bc8 32.Rf8 gxh4 33.gxh4 bxc4 34.
Nxc4 Rxh4 1/2-1/2

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Herzog, Adolf"]
[Black "Haigh, Geoff"]
[Result "1-0"]
[ECO "A00"]
[EventDate "1971.07.25"]
[PlyCount "67"]

1.Nc3 c5 2.Nf3 d5 3.e4 d4 4.Ne2 Nc6 5.Ng3 a6 6.a4 Qc7 7.Bc4 Nf6 8.d3 h6 9.
O-O e6 10.Ne1 Bd6 11.f4 e5 12.f5 Na5 13.Ba2 Be7 14.Nh5 Kf8 15.Nxf6 Bxf6 
16.Qh5 b5 17.g4 Kg8 18.Bd2 b4 19.Rf3 Qe7 20.Rh3 c4 21.dxc4 Bb7 22.Nd3 Bxe4
23.Bxb4 Qc7 24.Bxa5 Qxa5 25.c5 Qc7 26.g5 Bxd3 27.gxf6 Bxc2 28.Qg6 Rh7 29.
Rxh6 Bxf5 30.Qg2 Be4 31.Qxe4 Rxh6 32.Qxa8+ Kh7 33.Bb1+ g6 34.Qf8 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Makropoulos, Georgios"]
[Black "Rosenberg, Michael"]
[Result "1-0"]
[ECO "B25"]
[EventDate "1971.07.25"]
[PlyCount "55"]

1.e4 e6 2.d3 c5 3.g3 Nc6 4.Bg2 g6 5.Nc3 Bg7 6.f4 d6 7.Nf3 Nge7 8.O-O O-O 
9.Bd2 Rb8 10.Rb1 b5 11.a3 Bd7 12.Nh4 Nd4 13.Ne2 a5 14.c3 Nxe2+ 15.Qxe2 b4 
16.Qf2 bxa3 17.bxa3 Qc7 18.g4 f5 19.exf5 exf5 20.Rbe1 Rfe8 21.gxf5 Nxf5 
22.Bd5+ Kh8 23.Rxe8+ Rxe8 24.Re1 Rxe1+ 25.Qxe1 Nxh4 26.Qxh4 Bf5 27.Qe1 
Bxd3 28.Qe8+ 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Poutiainen, Pertti"]
[Black "De Villiers, Charles"]
[Result "0-1"]
[ECO "B35"]
[EventDate "1971.07.25"]
[PlyCount "132"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 Qa5 8.O-O 
O-O 9.Bb3 d6 10.h3 Bd7 11.f4 Rac8 12.Nf3 h6 13.Qe1 Qh5 14.Nh2 Qa5 15.Qh4 
Qh5 16.Qf2 b5 17.a3 a5 18.Rad1 b4 19.axb4 axb4 20.Nd5 Nxe4 21.Qe1 e6 22.g4
Qxh3 23.Rf3 Qxf3 24.Nxf3 exd5 25.Bxd5 Nf6 26.g5 Nxd5 27.gxh6 Nxe3 28.hxg7 
Rfe8 29.Rd3 Nf5 30.Qf1 Kxg7 31.Ng5 f6 32.Nf3 Re7 33.c3 Rce8 34.Kf2 Re4 35.
Qc1 Re2+ 36.Kg1 Rh8 37.Qd1 Ng3 38.Nh4 Rxh4 39.Rxg3 Rhh2 40.Qxd6 Be8 41.
Qc7+ Ne7 42.Re3 Rxe3 43.Kxh2 bxc3 44.bxc3 Bf7 45.c4 Re2+ 46.Kh3 Re4 47.c5 
Nd5 48.Qb7 Rxf4 49.c6 Rc4 50.Kg3 g5 51.Qd7 Kg6 52.Kf3 Nb6 53.Ke3 Rc3+ 54.
Ke4 Rxc6 55.Qf5+ Kg7 56.Qb5 Re6+ 57.Kf3 Nc4 58.Kg3 Ne5 59.Qb1 Rd6 60.Qf5 
Rd3+ 61.Kg2 Bg6 62.Qc8 Be4+ 63.Kf2 g4 64.Qc5 g3+ 65.Ke1 Bf3 66.Qc7+ Rd7 
0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Ribli, Zoltan"]
[Black "Gatt, Anthony"]
[Result "1-0"]
[WhiteElo "2440"]
[ECO "C65"]
[EventDate "1971.07.25"]
[PlyCount "55"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.c3 Be7 6.h3 a6 7.Ba4 O-O 8.O-O b5 9.
Bb3 d5 10.Qe2 dxe4 11.dxe4 Bc5 12.a4 b4 13.Rd1 Qe7 14.cxb4 Nxb4 15.Nc3 Be6
16.Bxe6 Qxe6 17.Nd5 Rfd8 18.Nxc7 Rxd1+ 19.Qxd1 Bxf2+ 20.Kh2 Ng4+ 21.Kh1 
Bg3 22.hxg4 Qxg4 23.Nxa8 h6 24.Ra3 Qh5+ 25.Kg1 Nc6 26.Rc3 Nd4 27.Rc8+ Kh7 
28.Ng5+ 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "De Villiers, Charles"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]
[BlackElo "2440"]
[ECO "B30"]
[EventDate "1971.07.25"]
[PlyCount "127"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 e6 4.O-O Nge7 5.c3 a6 6.Ba4 b5 7.Bc2 d5 8.d4 cxd4 
9.Nxd4 Bb7 10.Re1 Nxd4 11.cxd4 dxe4 12.Nc3 Nd5 13.Nxe4 Rc8 14.a3 Be7 15.
Be3 Nxe3 16.Rxe3 Rc4 17.Qe2 Rxd4 18.Re1 O-O 19.Qh5 h6 20.Rg3 Kh8 21.Qe5 
Bf6 22.Nxf6 Qxf6 23.Qxf6 gxf6 24.Rh3 Rd2 25.Rxh6+ Kg7 26.Rh7+ Kg8 27.Bb1 
Rxb2 28.Rh3 f5 29.Rg3+ Kh8 30.Rd1 Rg8 31.Rh3+ Kg7 32.Bd3 Rd8 33.Rc1 Rb3 
34.Bxf5 Rxh3 35.Bxh3 Rd2 36.Ra1 a5 37.Kf1 Bd5 38.Ke1 Rb2 39.g3 b4 40.axb4 
axb4 41.Bg4 b3 42.Bd1 Be4 43.Ra3 Bc2 44.Bxc2 bxc2 45.Kd2 c1=Q+ 46.Kxc1 
Rxf2 47.h4 f5 48.Kd1 Kf6 49.Ke1 Rb2 50.Kf1 Ke5 51.Ra4 Kd5 52.Rf4 Rb7 53.
Kf2 Rf7 54.Ra4 Ke5 55.Ke3 Rb7 56.Ra5+ Kf6 57.Rc5 Rb4 58.Ra5 Rb3+ 59.Kf2 e5
60.Ra6+ Kf7 61.Rc6 e4 62.Ra6 Rb2+ 63.Kf1 e3 64.Ra3 1/2-1/2

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Gatt, Anthony"]
[Black "Makropoulos, Georgios"]
[Result "1-0"]
[ECO "C47"]
[EventDate "1971.07.25"]
[PlyCount "91"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Nxc6 bxc6 7.Bg5 h6 8.
Bxf6 Qxf6 9.Qf3 Qe5 10.Be2 O-O 11.O-O Bb7 12.Qd3 Bxc3 13.bxc3 c5 14.Bf3 d6
15.g3 Rfe8 16.Rfe1 a5 17.Bg2 Ba6 18.c4 Qe6 19.Bf1 Rab8 20.Rab1 g6 21.f3 
Rb4 22.Rxb4 cxb4 23.Qd5 Qxd5 24.cxd5 Bxf1 25.Kxf1 Rb8 26.Ke2 Rb5 27.Kd2 
Rc5 28.Re3 f5 29.c3 fxe4 30.fxe4 Kg7 31.cxb4 axb4 32.Rb3 Ra5 33.Rb2 Kf6 
34.Kd3 Ke5 35.Re2 Ra3+ 36.Kc4 Rf3 37.Kxb4 Kd4 38.a4 Rf8 39.a5 Kd3 40.Re1 
Rf2 41.Ra1 Rxh2 42.a6 Rb2+ 43.Ka5 Rb8 44.a7 Ra8 45.Ka6 Kxe4 46.Kb7 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Haigh, Geoff"]
[Black "Poutiainen, Pertti"]
[Result "0-1"]
[ECO "E81"]
[EventDate "1971.07.25"]
[PlyCount "42"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.f3 d6 6.Bg5 Nc6 7.Nge2 Rb8 8.Qd2 a6 
9.a3 b5 10.cxb5 axb5 11.d5 Na7 12.Nd4 Nd7 13.Ncxb5 Nxb5 14.Nxb5 Nc5 15.Qc2
c6 16.Nc3 cxd5 17.Be2 h6 18.Bd2 d4 19.Na4 Nb3 20.Rd1 Bd7 21.Qc4 Qe8 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Rosenberg, Michael"]
[Black "Herzog, Adolf"]
[Result "1-0"]
[ECO "C05"]
[EventDate "1971.07.25"]
[PlyCount "61"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ngf3 Qb6 8.O-O 
cxd4 9.cxd4 Nxd4 10.Nxd4 Qxd4 11.Nf3 Qb6 12.Qa4 Qb4 13.Qc2 Nc5 14.Bd2 Qb6 
15.Be3 Bd7 16.Rab1 Rc8 17.Rfc1 Qd8 18.b4 Nxd3 19.Qxd3 Rxc1+ 20.Rxc1 a6 21.
Bg5 Be7 22.Bxe7 Qxe7 23.Rc7 Qxb4 24.h3 Qb6 25.Qc3 h6 26.Nd4 Kd8 27.Rc5 
Qb1+ 28.Kh2 b6 29.Rc7 Qe4 30.g3 Re8 31.Ra7 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "De Villiers, Charles"]
[Black "Haigh, Geoff"]
[Result "1-0"]
[ECO "B56"]
[EventDate "1971.07.25"]
[PlyCount "65"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+ Bd7 7.Bxd7+ Qxd7 8.
Nde2 Be7 9.Bg5 O-O 10.O-O Nc6 11.Bxf6 Bxf6 12.Nd5 Be7 13.Qd3 Rfd8 14.Rad1 
Rac8 15.c3 Bf8 16.f4 exf4 17.Rxf4 Ne5 18.Qg3 Qb5 19.Rd2 Ng6 20.Rf5 Qc4 21.
Nd4 Qxa2 22.Rf1 Re8 23.Qf3 Ne5 24.Qh5 Qc4 25.Rdf2 Qd3 26.Rxf7 Nxf7 27.
Qxf7+ Kh8 28.Ne6 h6 29.Ndf4 Qe3+ 30.Kh1 Kh7 31.Qg6+ Kh8 32.Nh5 Qe2 33.
Rxf8+ 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Herzog, Adolf"]
[Black "Gatt, Anthony"]
[Result "1-0"]
[ECO "A00"]
[EventDate "1971.07.25"]
[PlyCount "35"]

1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5 4.Bc4 Qh4 5.d3 Be7 6.h3 Nf6 7.Bg5 Bg4 8.Bxh4 
Bxd1 9.Nxf6+ gxf6 10.Rxd1 Rg8 11.Nf3 Nd7 12.O-O Rg7 13.Rfe1 O-O-O 14.d4 
Rdg8 15.dxe5 Bc5 16.exf6 Rxg2+ 17.Kh1 Ne5 18.Rxe5 1-0

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Poutiainen, Pertti"]
[Black "Rosenberg, Michael"]
[Result "1/2-1/2"]
[ECO "C19"]
[EventDate "1971.07.25"]
[PlyCount "127"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.a3 Bxc3+ 6.bxc3 c5 7.Nf3 Nbc6 8.a4 
Qa5 9.Qd2 Bd7 10.Ba3 cxd4 11.cxd4 Qxd2+ 12.Kxd2 Nf5 13.Bb2 Rc8 14.a5 f6 
15.exf6 gxf6 16.c3 Nd6 17.Ke3 Ne7 18.Nd2 Nef5+ 19.Kf4 Bb5 20.g4 Ne7 21.Bg2
Kf7 22.Rhe1 h5 23.h3 hxg4 24.hxg4 Rh2 25.Rh1 Rxh1 26.Bxh1 Bd7 27.Ke3 Nb5 
28.Kd3 e5 29.f3 Ng6 30.Rc1 Nf4+ 31.Ke3 Rh8 32.dxe5 fxe5 33.c4 d4+ 34.Ke4 
Bc6+ 35.Kf5 Nd6+ 36.Kxe5 Nd3+ 37.Kxd6 Nxc1 38.Bxc1 Rxh1 39.Ba3 a6 40.Kc5 
Rh3 41.Kxd4 Bxf3 42.Nxf3 Rxf3 43.Bc1 Rf1 44.Bd2 Rd1 45.Kc3 Ke6 46.g5 Ke5 
47.Kd3 Rg1 48.Bc3+ Kd6 49.Bd2 Rg4 50.Bc1 Rg2 51.Bf4+ Ke6 52.Bd2 Rg1 53.Ke4
Ra1 54.Kd3 Kf5 55.Bc3 Ra3 56.Kc2 Ra2+ 57.Kb3 Rg2 58.Bf6 Ke4 59.Kb4 Kd3 60.
Kc5 Rg4 61.Kb6 Kxc4 62.Kxb7 Kb4 63.Kc7 Kxa5 64.Kd7 1/2-1/2

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Ribli, Zoltan"]
[Black "Makropoulos, Georgios"]
[Result "1/2-1/2"]
[WhiteElo "2440"]
[ECO "B36"]
[EventDate "1971.07.25"]
[PlyCount "121"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6 8.Be3 
Bg7 9.f3 O-O 10.Qd2 Bd7 11.Rc1 Bc6 12.Be2 a5 13.g4 h5 14.h3 Kh7 15.Nd5 
Bxd5 16.exd5 a4 17.Qd3 h4 18.Bg5 Nd7 19.Rc2 Bf6 20.Bd2 Qb6 21.g5 Bxb2 22.
f4 Bd4 23.Kf1 e5 24.Qf3 f5 25.gxf6 Nxf6 26.Ke1 e4 27.Qg2 e3 28.Bc1 Rae8 
29.Rg1 Rg8 30.Qg5 Qb4+ 31.Kf1 Rg7 32.Bd3 e2+ 33.Rxe2 Rxe2 34.Bxg6+ Kg8 35.
Bf7+ Kxf7 36.Qxg7+ Ke8 37.Qg6+ Kd8 38.Kxe2 Qxc4+ 39.Kd1 Qxd5 40.Rg2 Be3+ 
41.Rd2 Qh1+ 42.Kc2 Qc6+ 43.Kd3 Nd5 44.Qg5+ Kc7 45.Rc2 Nb4+ 46.Kxe3 Nxc2+ 
47.Kd2 Nb4 48.Qa5+ Qb6 49.Qxb6+ Kxb6 50.f5 Nd5 51.Bb2 Kc6 52.Ke2 Ne7 53.
Kf3 Nxf5 54.Kg4 Ne3+ 55.Kxh4 Kd5 56.Kg5 Ke6 57.h4 b5 58.h5 Nf5 59.a3 d5 
60.Kf4 d4 61.Ke4 1/2-1/2

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Gatt, Anthony"]
[Black "Poutiainen, Pertti"]
[Result "0-1"]
[ECO "A45"]
[EventDate "1971.07.25"]
[PlyCount "36"]

1.d4 Nf6 2.e3 g6 3.Bd3 Bg7 4.f4 O-O 5.e4 d6 6.Nf3 c5 7.c3 cxd4 8.cxd4 Nc6 
9.Qb3 Bg4 10.Be3 Bxf3 11.gxf3 Nh5 12.d5 Nd4 13.Qd1 Qb6 14.Nd2 Nc2+ 15.Bxc2
Qxe3+ 16.Qe2 Qxf4 17.Rb1 Rfc8 18.Bd1 Bd4 {time} 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Haigh, Geoff"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]
[BlackElo "2440"]
[ECO "D63"]
[EventDate "1971.07.25"]
[PlyCount "28"]

1.d4 Nf6 2.Nf3 e6 3.c4 d5 4.Nc3 Be7 5.Bg5 Nbd7 6.e3 O-O 7.Rc1 b6 8.cxd5 
exd5 9.Bd3 Bb7 10.O-O c5 11.Qe2 c4 12.Bb1 Re8 13.Qc2 g6 14.Rce1 a6 1/2-1/2

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Makropoulos, Georgios"]
[Black "Herzog, Adolf"]
[Result "0-1"]
[ECO "B20"]
[EventDate "1971.07.25"]
[PlyCount "96"]

1.e4 e6 2.d3 c5 3.g3 g6 4.Bg2 Bg7 5.Ne2 Nc6 6.O-O Nge7 7.c3 O-O 8.Be3 b6 
9.f4 Ba6 10.a4 Rc8 11.Bf2 f5 12.Na3 Kh8 13.Nb5 d6 14.Re1 e5 15.d4 cxd4 16.
cxd4 Nb4 17.Rf1 fxe4 18.Bxe4 d5 19.Bg2 e4 20.Be1 Nc2 21.Bc3 Nxa1 22.Qxa1 
Qe8 23.Nd6 Qd7 24.Nxc8 Bxe2 25.Re1 Rxc8 26.Rxe2 Nf5 27.Bh3 b5 28.Bxf5 gxf5
29.axb5 Qxb5 30.Re1 Qb6 31.Qa4 h6 32.Ra1 Rc7 33.Kh1 Qe6 34.Qb5 Kh7 35.Ra6 
Qf7 36.Rd6 Qh5 37.Qf1 e3 38.Re6 Bxd4 39.Bxd4 Rc2 40.h4 Rf2 41.Qxf2 exf2 
42.Bxf2 d4 43.Rd6 Qf3+ 44.Kg1 d3 45.Rd7+ Kg6 46.Be1 Kh5 47.Rxa7 Kg4 48.b4 
d2 0-1

[Event "11th World U20 ch prel. group 3"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Rosenberg, Michael"]
[Black "De Villiers, Charles"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1971.07.25"]
[PlyCount "55"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Nf3 c5 6.e5 dxe5 7.dxe5 Qxd1+ 8.Kxd1 
Ng4 9.Ke1 O-O 10.Bd3 Nc6 11.h3 Nh6 12.Be3 b6 13.g4 Bb7 14.Be4 Rad8 15.Kf2 
f6 16.e6 f5 17.Bxc6 Bxc6 18.g5 Ng4+ 19.hxg4 fxg4 20.Nh2 Bxh1 21.Rxh1 Rd6 
22.Nxg4 Rfd8 23.f5 Rf8 24.f6 Rxe6 25.Nd5 h5 26.gxh6 Bxf6 27.Ngxf6+ exf6 
28.h7+ 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Dieks, Roy"]
[Black "Shirazi, Kamran"]
[Result "1/2-1/2"]
[ECO "E99"]
[EventDate "1971.07.25"]
[PlyCount "118"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Nf3 Nc6 7.O-O e5 8.d5 Ne7 
9.Ne1 Nd7 10.Nd3 f5 11.f3 f4 12.Bd2 g5 13.Rc1 Ng6 14.c5 Nxc5 15.Nxc5 dxc5 
16.Na4 b6 17.b4 cxb4 18.Bxb4 Bd7 19.Bxf8 Bxa4 20.Qxa4 Bxf8 21.Bb5 a5 22.
Bd7 Bd6 23.Be6+ Kh8 24.Rc2 Nf8 25.Bf5 Qe7 26.Rfc1 Rd8 27.Rc6 Ra8 28.Qc4 
Ra7 29.Qb5 Kg7 30.R1c4 h5 31.Qb2 Kf7 32.h3 Nd7 33.Rxd6 cxd6 34.Rc8 Nf6 35.
Qxb6 Rb7 36.Qxa5 Rb1+ 37.Kf2 Rb2+ 38.Kf1 Rb1+ 39.Ke2 Rb7 40.Be6+ Kg7 41.
Qd8 Rb2+ 42.Kf1 Rb1+ 43.Ke2 Rb2+ 44.Kd1 Qxd8 45.Rxd8 Rxa2 46.Rxd6 Rxg2 47.
Rd8 g4 48.hxg4 hxg4 49.Bxg4 Nxg4 50.fxg4 f3 51.Ke1 Re2+ 52.Kf1 Rxe4 53.Kf2
Rf4 54.Re8 Rxg4 55.Rxe5 Kf6 56.Rh5 Rg5 57.Rh6+ Ke7 58.d6+ Kd7 59.Kxf3 Rd5 
1/2-1/2

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Kwan Ka Kin"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "B03"]
[EventDate "1971.07.25"]
[PlyCount "66"]

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.d4 d6 5.f4 Bf5 6.Nf3 e6 7.Be3 Be7 8.Nc3 O-O 
9.Be2 dxe5 10.dxe5 Na6 11.O-O Qe8 12.Qc1 Nb4 13.a3 Nd3 14.Bxd3 Bxd3 15.Rd1
Bxc4 16.Qc2 c5 17.Qf2 Qc6 18.Rdc1 Rfd8 19.Nd2 Bd3 20.Nb3 c4 21.Nd2 Nd5 22.
Nxd5 Qxd5 23.Nb1 b5 24.Kh1 a5 25.Rd1 b4 26.Qe1 Qc6 27.Rc1 Be4 28.Nd2 Bxg2+
29.Kg1 Bd5 30.Nb3 Bh1 31.Qg3 Rd3 32.Nd4 Qe4 33.Kf2 Bh4 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Pinal Borges, Nelson"]
[Black "Ost-Hansen, Jacob"]
[Result "1-0"]
[ECO "B11"]
[EventDate "1971.07.25"]
[PlyCount "82"]

1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bxf3 5.Qxf3 Nf6 6.d3 e6 7.g3 Bb4 8.Bd2 d4 
9.Nb1 Qb6 10.c3 Bc5 11.b3 Nbd7 12.c4 a5 13.Bf4 e5 14.Bg5 a4 15.Nd2 Bb4 16.
Qd1 Ng8 17.g4 f6 18.Bh4 Ne7 19.Be2 axb3 20.Qxb3 Nc5 21.Qc2 Qa5 22.a3 Bxd2+
23.Qxd2 Qxd2+ 24.Kxd2 Nb3+ 25.Kc2 Nxa1+ 26.Rxa1 Kd7 27.Bg3 Ng6 28.Bd1 Ra5 
29.Kb2 Nf8 30.f4 Ne6 31.f5 Nc5 32.Bc2 g6 33.Rf1 gxf5 34.Rxf5 Ke6 35.Bh4 
Nd7 36.Be1 Raa8 37.Bb3 Ke7 38.Bh4 c5 39.Bd1 Rhg8 40.Rh5 Rg7 41.Bc2 Ra6 {
time} 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Lev, Arieh"]
[Black "Pinal Borges, Nelson"]
[Result "0-1"]
[ECO "C86"]
[EventDate "1971.07.25"]
[PlyCount "68"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2 b5 6.Bb3 Be7 7.O-O d6 8.c3 O-O 
9.d4 Bg4 10.Rd1 exd4 11.cxd4 d5 12.e5 Ne4 13.Nc3 Nxc3 14.bxc3 Na5 15.Bc2 
Nc4 16.Qd3 g6 17.Bh6 Nb2 18.Qd2 Bxf3 19.gxf3 Nxd1 20.Bxf8 Bxf8 21.Qxd1 Qh4
22.Bd3 c5 23.Bf1 Re8 24.a4 b4 25.cxb4 cxd4 26.b5 Rxe5 27.f4 Qxf4 28.bxa6 
Rg5+ 29.Bg2 Bd6 30.Kf1 Bc5 31.Qf3 Qd2 32.Rd1 Qc2 33.Re1 Rf5 34.Qe2 d3 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Ost-Hansen, Jacob"]
[Black "Dieks, Roy"]
[Result "0-1"]
[ECO "A20"]
[EventDate "1971.07.25"]
[PlyCount "92"]

1.g3 e5 2.c4 d6 3.Bg2 g6 4.Nc3 Bg7 5.e3 Ne7 6.Nge2 O-O 7.O-O Nbc6 8.d3 Be6
9.Nd5 Qd7 10.Qa4 Nf5 11.Nec3 a6 12.Bd2 h5 13.Ne4 f6 14.Rab1 Nfe7 15.Nec3 
Rab8 16.b4 Rfc8 17.b5 axb5 18.cxb5 Nd8 19.Qb4 Nxd5 20.Nxd5 Qf7 21.e4 Bxd5 
22.exd5 b6 23.f4 Nb7 24.Qc4 f5 25.a4 Nc5 26.a5 exf4 27.gxf4 bxa5 28.Bxa5 
Qf6 29.Kh1 Qd4 30.Rf3 Ra8 31.Bb4 Ra4 32.Rg3 Kf7 33.b6 Ra1 34.Qc1 Rca8 35.
Bxc5 Qxc5 36.Qxc5 Rxb1+ 37.Qg1 Raa1 38.Bf3 Bd4 39.Qxb1 Rxb1+ 40.Kg2 cxb6 
41.Kh3 b5 42.Rg2 b4 43.Kh4 b3 44.Kg5 b2 45.Kh6 Rg1 46.Rc2 b1=Q 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Shirazi, Kamran"]
[Black "Kwan Ka Kin"]
[Result "1-0"]
[ECO "B34"]
[EventDate "1971.07.25"]
[PlyCount "79"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Nxc6 bxc6 7.e5 Ng8 8.Qf3
Qa5 9.Bf4 Ba6 10.e6 fxe6 11.Bxa6 Qxa6 12.Be5 Nf6 13.Bxf6 exf6 14.Qxf6 Rg8 
15.Qh4 Rg7 16.O-O-O Rb8 17.Rd3 Rf7 18.Qg3 Bh6+ 19.Kb1 Rb4 20.Rhd1 Qb7 21.
b3 Bf4 22.Qh3 e5 23.f3 d5 24.Qe6+ Kf8 25.g3 Bg5 26.Ne4 dxe4 27.Rd7 Rxd7 
28.Rxd7 Qxd7 29.Qxd7 exf3 30.Qxc6 e4 31.c3 Rb6 32.Qa8+ Kg7 33.Qxa7+ Kh6 
34.Qxb6 e3 35.h4 f2 36.hxg5+ Kh5 37.Qb5 Kg4 38.Qe2+ Kxg3 39.Qxe3+ Kg2 40.
Qe4+ 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Dieks, Roy"]
[Black "Lev, Arieh"]
[Result "1-0"]
[ECO "D93"]
[EventDate "1971.07.25"]
[PlyCount "43"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O-O 6.Rc1 c6 7.e3 h6 8.h3 Be6 9.
b3 Nbd7 10.Bd3 c5 11.cxd5 Nxd5 12.Nxd5 Bxd5 13.e4 Bc6 14.d5 Bb5 15.Bxb5 
Qa5+ 16.Qd2 Qxb5 17.Bxh6 Rad8 18.Bxg7 Kxg7 19.Qc3+ f6 20.Ng5 Ne5 21.Ne6+ 
Kg8 22.Rd1 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Kwan Ka Kin"]
[Black "Ost-Hansen, Jacob"]
[Result "0-1"]
[ECO "A02"]
[EventDate "1971.07.25"]
[PlyCount "70"]

1.f4 c5 2.Nf3 g6 3.e3 Bg7 4.c4 Nf6 5.Nc3 O-O 6.Be2 Nc6 7.O-O d5 8.cxd5 
Nxd5 9.Rb1 Bf5 10.Ra1 Ndb4 11.Ne1 Qd7 12.a3 Nd3 13.Nxd3 Bxd3 14.Bxd3 Qxd3 
15.Qe2 Rad8 16.Rf3 Qxe2 17.Nxe2 c4 18.Kf1 Na5 19.Ke1 Nb3 20.Rb1 f5 21.Kd1 
Rd3 22.Ng3 Rfd8 23.Rf2 Rxe3 24.Nf1 Red3 25.Re2 Kf7 26.Ne3 b5 27.a4 a6 28.
axb5 axb5 29.Nc2 e6 30.Nb4 R3d6 31.Nc2 h6 32.Ne1 g5 33.fxg5 hxg5 34.Nf3 g4
35.Ne1 Bh6 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Torre, Eugenio"]
[Black "Shirazi, Kamran"]
[Result "1-0"]
[WhiteElo "2400"]
[ECO "C43"]
[EventDate "1971.07.25"]
[PlyCount "53"]

1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Nc6 8.Nxc6 
bxc6 9.c5 Be7 10.Nd2 Bf6 11.Nxe4 dxe4 12.Bxe4 Ba6 13.Re1 Bxd4 14.Qc2 h6 
15.Be3 Bxe3 16.Rxe3 Rb8 17.Qc3 Qd7 18.Rg3 f6 19.Bc2 Rbd8 20.Qf3 Rfe8 21.h3
Re2 22.Rd1 Qe7 23.Rxd8+ Qxd8 24.Qf5 Qf8 25.Qh7+ Kf7 26.Bb3+ Ke8 27.Rxg7 
1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Lev, Arieh"]
[Black "Kwan Ka Kin"]
[Result "1-0"]
[ECO "B38"]
[EventDate "1971.07.25"]
[PlyCount "77"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 d6 7.Nc3 Nf6 8.Be2 
O-O 9.O-O a6 10.f3 Be6 11.Qd2 Qa5 12.a3 Rfc8 13.b4 Qd8 14.Nxe6 fxe6 15.Na4
Nd7 16.Rac1 e5 17.c5 Nd4 18.Bc4+ Kh8 19.Bxd4 exd4 20.Be6 dxc5 21.Bxd7 Qxd7
22.Nb6 Qb5 23.bxc5 d3 24.Nxa8 Rxa8 25.Rfd1 Rd8 26.Qb4 Qd7 27.Rb1 d2 28.
Qxb7 Qd4+ 29.Kh1 Qxc5 30.Rxd2 Rc8 31.Rbd1 Bf8 32.Qxa6 Qc3 33.Qd3 Qc7 34.
Qd4+ Kg8 35.Qd5+ Kh8 36.a4 Bh6 37.Rd3 Bf4 38.Qd7 Qc2 39.Qxc8+ 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Ost-Hansen, Jacob"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "A00"]
[EventDate "1971.07.25"]
[PlyCount "87"]

1.g3 g6 2.Bg2 Bg7 3.Nc3 e5 4.d3 Ne7 5.e4 c6 6.Nge2 d5 7.O-O d4 8.Nb1 O-O 
9.Nd2 c5 10.f4 f6 11.Nf3 Nbc6 12.Nh4 Qd6 13.f5 Nd8 14.h3 Nf7 15.Bd2 Bh6 
16.fxg6 hxg6 17.Rf2 Bxd2 18.Qxd2 Ng5 19.Kh2 Kg7 20.Raf1 Be6 21.b3 b5 22.
Ng1 c4 23.g4 Rac8 24.Ngf3 Nxf3+ 25.Rxf3 cxd3 26.cxd3 Bd7 27.Rg3 Rh8 28.Nf3
g5 29.Qf2 Rcf8 30.h4 Ng6 31.h5 Nf4 32.Qd2 Rc8 33.Rd1 Rc3 34.Ne1 Rhc8 35.
Bf3 Nxd3 36.Nxd3 Rc2 37.Rg2 Rxd2 38.Rgxd2 Rc3 39.Kg2 b4 40.Be2 Qc6 41.Nf2 
a5 42.Bc4 Qc8 43.Be2 Re3 44.Bf3 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Pinal Borges, Nelson"]
[Black "Dieks, Roy"]
[Result "1/2-1/2"]
[ECO "B31"]
[EventDate "1971.07.25"]
[PlyCount "49"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Nf6 5.Bxc6 bxc6 6.Nc3 Bg7 7.d3 O-O 8.Be3 
d6 9.h3 Rb8 10.Rb1 Nd7 11.Qd2 d5 12.Bh6 d4 13.Ne2 e5 14.Ng3 Qe7 15.Bxg7 
Kxg7 16.Nh2 Qh4 17.Nf3 Qf6 18.Nh2 Qh4 19.Nf3 Qf6 20.b3 Rb5 21.Rbe1 h6 22.
Nh2 Qg5 23.Nf3 Qf6 24.Nh2 Qf4 25.Qd1 1/2-1/2

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Kwan Ka Kin"]
[Black "Pinal Borges, Nelson"]
[Result "0-1"]
[ECO "C58"]
[EventDate "1971.07.25"]
[PlyCount "60"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.Qe2 
Nxc4 9.dxc4 Bd6 10.Nd4 O-O 11.Be3 Be5 12.c3 Re8 13.h3 Nd7 14.Nc2 c5 15.g4 
Qb6 16.Nca3 Qf6 17.Kd1 Bf4 18.Nc2 a6 19.Nd2 b5 20.h4 g6 21.g5 Qf5 22.gxh6 
Nf6 23.Bxf4 Qxf4 24.Ne3 Bg4 25.Nxg4 Nxg4 26.f3 Ne3+ 27.Kc1 Nxc4 28.Kc2 
exf3 29.Qd3 Re3 30.Qf1 Rxc3+ 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Shirazi, Kamran"]
[Black "Ost-Hansen, Jacob"]
[Result "0-1"]
[ECO "B17"]
[EventDate "1971.07.25"]
[PlyCount "64"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bc4 Bf5 8.
Ne5 e6 9.g4 Be4 10.f3 Bd5 11.Bd3 Bd6 12.g5 Bxe5 13.dxe5 Nd7 14.c4 Bxf3 15.
Qxf3 Nxe5 16.Qe3 Nxd3+ 17.Ke2 Nxc1+ 18.Raxc1 Qb6 19.Qxb6 axb6 20.a3 h6 21.
g6 f6 22.Rc3 O-O-O 23.Ke3 Rd7 24.a4 Rhd8 25.Rb3 Kc7 26.Ra1 Rd4 27.a5 bxa5 
28.Rxa5 Rxc4 29.Ra7 Rb8 30.Kf3 Rc5 31.h4 Rc4 32.Kg3 h5 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Torre, Eugenio"]
[Black "Lev, Arieh"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[ECO "B31"]
[EventDate "1971.07.25"]
[PlyCount "86"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.Re1 O-O 7.d4 Qb6 8.Bxc6 
bxc6 9.b3 cxd4 10.cxd4 d6 11.Nc3 Nd7 12.Bg5 Re8 13.Rc1 Bb7 14.Be3 Qa5 15.
Re2 c5 16.Rec2 cxd4 17.Bxd4 Bxd4 18.Nxd4 Rac8 19.f3 Qg5 20.Qd2 Qxd2 21.
Rxd2 Rc5 22.Rdc2 Rec8 23.Na4 Rxc2 24.Rxc2 Rxc2 25.Nxc2 Kf8 26.Kf2 e6 27.
Ke3 Ke7 28.Nc3 f5 29.Nd4 Ne5 30.h3 Nc6 31.Nxc6+ Bxc6 32.f4 Bxe4 33.Nxe4 
fxe4 34.Kxe4 h5 35.g4 hxg4 36.hxg4 Kd7 37.b4 Kc6 38.a4 Kb6 39.f5 exf5+ 40.
gxf5 gxf5+ 41.Kxf5 a6 42.Ke4 Kc6 43.Kd4 Kc7 1/2-1/2

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Lev, Arieh"]
[Black "Shirazi, Kamran"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1971.07.25"]
[PlyCount "67"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Nf3 O-O 6.Be2 Nbd7 7.O-O e5 8.dxe5 
dxe5 9.Nxe5 Nxe5 10.Qxd8 Rxd8 11.fxe5 Ng4 12.Bg5 Re8 13.Bf6 Ne3 14.Rfc1 
Bh6 15.h3 c6 16.Kf2 Bf4 17.Kf3 Nxg2 18.Rh1 Bxe5 19.Bxe5 Rxe5 20.Kxg2 f5 
21.Rad1 Be6 22.exf5 Bxf5 23.Bd3 Bxd3 24.Rxd3 Rae8 25.Rhd1 Rg5+ 26.Rg3 Rf5 
27.Rf3 Rxf3 28.Kxf3 Re7 29.Ne4 Kg7 30.Rd8 h6 31.Ra8 b6 32.Rc8 c5 33.Nd6 
Rd7 34.Rc7 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Dieks, Roy"]
[Black "Kwan Ka Kin"]
[Result "1/2-1/2"]
[ECO "A85"]
[EventDate "1971.07.25"]
[PlyCount "101"]

1.d4 f5 2.c4 Nf6 3.Nc3 b6 4.e3 Bb7 5.f3 e6 6.Bd3 Be7 7.Nge2 O-O 8.O-O Nc6 
9.a3 a5 10.Qc2 Qe8 11.Bd2 Rf7 12.Nb5 Rc8 13.e4 fxe4 14.fxe4 e5 15.d5 Nb8 
16.h3 d6 17.b4 axb4 18.axb4 Na6 19.Ng3 Qd7 20.Qb3 Ra8 21.Be3 Rff8 22.c5 
Qe8 23.c6 Bc8 24.Nc3 Nh5 25.Rxf8+ Bxf8 26.Nxh5 Nc5 27.Qb1 Rxa1 28.Qxa1 
Nxd3 29.Qb1 Qxh5 30.Qxd3 Qg6 31.Kh2 Be7 32.Bf2 h5 33.Qc2 h4 34.Nb5 Qg5 35.
Na7 Qf4+ 36.g3 hxg3+ 37.Bxg3 Qf8 38.Qa2 Bf6 39.Nb5 Qe8 40.Qa8 Kh7 41.Nxc7 
Qh5 42.Qxc8 Qe2+ 43.Kg1 Qd1+ 44.Kg2 Qe2+ 45.Bf2 Qxe4+ 46.Kg1 Qb1+ 47.Kh2 
Qc2 48.Kg1 Qb1+ 49.Kg2 Qe4+ 50.Kf1 Qd3+ 51.Kg1 1/2-1/2

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Pinal Borges, Nelson"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "B09"]
[EventDate "1971.07.25"]
[PlyCount "58"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be2 Na6 7.O-O c5 8.d5 Nc7 
9.a4 b6 10.Nd2 e6 11.Bf3 exd5 12.Nxd5 Nfxd5 13.exd5 Qd7 14.Ne4 Ba6 15.Re1 
Rae8 16.c3 Bc4 17.Be3 Nxd5 18.Bf2 Nxf4 19.Qxd6 Qf5 20.g4 Ne2+ 21.Kg2 Qc8 
22.Nf6+ Bxf6 23.Qxf6 Re6 24.Qg5 Rfe8 25.Rad1 Ba6 26.Bd5 Bb7 27.c4 Re5 28.
Qf6 Qxg4+ 29.Bg3 Bxd5+ 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Ost-Hansen, Jacob"]
[Black "Lev, Arieh"]
[Result "1-0"]
[ECO "B25"]
[EventDate "1971.07.25"]
[PlyCount "145"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e6 7.Nge2 Nge7 8.Be3 Nd4 
9.Rb1 Qa5 10.O-O O-O 11.a3 Nec6 12.g4 f5 13.gxf5 exf5 14.Ng3 Qd8 15.Qd2 
Rb8 16.b4 b6 17.Kh1 Qh4 18.Nd5 Ne7 19.bxc5 dxc5 20.Bf2 Nxd5 21.exd5 Bd7 
22.Nxf5 Qf6 23.Nxg7 Kxg7 24.Bg3 Nf5 25.c3 h5 26.Bf2 Nd6 27.Rbe1 Rf7 28.d4 
c4 29.Bg1 Rbf8 30.Re5 Qh4 31.Be3 Nf5 32.Bf2 Qg4 33.Rg1 Nd6 34.Be3 Qh4 35.
Qe2 Nf5 36.Be4 Rf6 37.Bd2 Nd6 38.Bf3 Bf5 39.Qg2 R6f7 40.Qg3 Qxg3 41.hxg3 
Bg4 42.Kg2 b5 43.Rh1 Bxf3+ 44.Kxf3 Nf5 45.Rb1 a6 46.Bc1 Rd8 47.a4 Rfd7 48.
axb5 Rb7 49.b6 Rd6 50.Re6 Kf7 51.Ba3 Rxe6 52.dxe6+ Kxe6 53.Bc5 Nd6 54.Rb4 
Kd5 55.Bxd6 Kxd6 56.Rxc4 Rxb6 57.Rc5 Rb3 58.Ke4 Ra3 59.Kd3 Ke6 60.Re5+ Kf6
61.d5 Ra1 62.Kc4 h4 63.gxh4 Ra4+ 64.Kc5 Rxf4 65.Re6+ Kf7 66.Rxa6 Rxh4 67.
Ra7+ Kf6 68.Ra8 g5 69.d6 Ke6 70.Re8+ Kd7 71.Re7+ Kd8 72.Rg7 Rg4 73.c4 1-0

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Shirazi, Kamran"]
[Black "Pinal Borges, Nelson"]
[Result "0-1"]
[ECO "C85"]
[EventDate "1971.07.25"]
[PlyCount "98"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6 dxc6 7.Nxe5 Nxe4 8.
Qe2 Nc5 9.Re1 Ne6 10.c3 O-O 11.d4 Qd5 12.Nd2 f6 13.Nef3 Bd7 14.c4 Qh5 15.
Nf1 Rfe8 16.Ng3 Qf7 17.Be3 c5 18.d5 Nf8 19.Rad1 Ng6 20.h3 Bd6 21.Qc2 h6 
22.Nf5 Bf8 23.b3 Ne5 24.Nh2 Qg6 25.g4 h5 26.f4 hxg4 27.hxg4 Nf3+ 28.Kf2 
Bxf5 29.gxf5 Nxe1 30.Rxe1 Qh5 31.Kg3 Bd6 32.Ng4 Qg5 33.Qd3 Re7 34.Rf1 Rae8
35.Bxc5 Qh5 36.Qf3 Qxf5 37.Bd4 Kf8 38.Rh1 Re4 39.Be3 g5 40.Rh6 Bxf4+ 41.
Bxf4 gxf4+ 42.Kf2 Re2+ 43.Kg1 Qb1+ 44.Qf1 Re1 45.Rxf6+ Kg7 46.Rxf4 Rxf1+ 
47.Rxf1 Re1 48.Ne3 Rxf1+ 49.Nxf1 Qxa2 0-1

[Event "11th World U20 ch prel. group 4"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Torre, Eugenio"]
[Black "Dieks, Roy"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[ECO "B92"]
[EventDate "1971.07.25"]
[PlyCount "62"]

1.e4 c5 2.Nf3 d6 3.Nc3 Nf6 4.d4 cxd4 5.Nxd4 a6 6.Be2 e5 7.Nb3 Be6 8.f4 Qc7
9.O-O Nbd7 10.f5 Bc4 11.a4 Be7 12.Be3 O-O 13.a5 b5 14.axb6 Nxb6 15.Kh1 
Rfc8 16.Bxb6 Qxb6 17.Bxc4 Rxc4 18.Qe2 Rb4 19.Ra2 Qb7 20.Na5 Qb6 21.Rd1 Rc8
22.Nb3 Rbc4 23.Nd2 R4c6 24.Na4 Qb5 25.c4 Qb7 26.b3 Ne8 27.Rb1 Bg5 28.Nf3 
Bh6 29.Rab2 Nf6 30.Ne1 Qa8 31.Nc3 Qa7 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Cappello, Renato"]
[Black "Wach, Slawomir"]
[Result "1/2-1/2"]
[ECO "B28"]
[EventDate "1971.07.25"]
[PlyCount "46"]

1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e6 6.Be2 Qc7 7.O-O Nf6 8.Nc3 
Bb4 9.Nxc6 dxc6 10.Qd3 O-O 11.Rd1 e5 12.a3 Be7 13.Qg3 Kh8 14.Be3 Nxe4 15.
Nxe4 f5 16.Bd3 fxe4 17.Bxe4 Be6 18.Rac1 Rad8 19.Bg5 Rxd1+ 20.Rxd1 Rd8 21.
Re1 Bxg5 22.Qxg5 Qd6 23.Qh5 Bg8 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Haik, Aldo"]
[Black "Piasetski, Leon David"]
[Result "0-1"]
[ECO "E80"]
[EventDate "1971.07.25"]
[PlyCount "138"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 c6 6.Be3 a6 7.Qd2 b5 8.O-O-O Qa5 
9.Kb1 Nbd7 10.h4 h5 11.Nh3 Nb6 12.Bd3 Bxh3 13.Rxh3 Nxc4 14.Bxc4 bxc4 15.
Rhh1 Rb8 16.Bg5 Qb4 17.e5 Nd5 18.Nxd5 cxd5 19.Qxb4 Rxb4 20.Bd2 Rb5 21.f4 
e6 22.Kc2 Kd7 23.Rhf1 Bf8 24.Rf3 Be7 25.g3 Rhb8 26.Bc3 a5 27.Rdf1 a4 28.
R3f2 R8b7 29.Rf3 Ke8 30.R3f2 R5b6 31.Rf3 Kf8 32.R3f2 Kg7 33.Rf3 a3 34.bxa3
dxe5 35.fxe5 Bxa3 36.R3f2 Bb2 37.Rb1 Bxc3 38.Rxb6 Rxb6 39.Kxc3 Rb1 40.Rf3 
Kf8 41.Kc2 Rg1 42.Kb2 Rd1 43.Kc3 Ke7 44.Re3 Rf1 45.Kc2 Rf2+ 46.Kb1 Rd2 47.
a4 Rxd4 48.a5 Rd1+ 49.Kb2 Rd2+ 50.Kb1 Rd1+ 51.Kb2 Rd2+ 52.Kb1 d4 53.Ra3 c3
54.a6 Rb2+ 55.Kc1 Rb8 56.a7 Ra8 57.Ra4 f6 58.Rxd4 Rxa7 59.Rc4 f5 60.Rxc3 
Ra5 61.Re3 Rd5 62.Kc2 Kf7 63.Kc3 g5 64.Re1 Kg6 65.Re2 f4 66.gxf4 gxf4 67.
Rg2+ Kf5 68.Rg5+ Ke4 69.Rxh5 f3 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Karakasoglou, Alexandros"]
[Black "Barle, Janez"]
[Result "0-1"]
[BlackElo "2260"]
[ECO "B80"]
[EventDate "1971.07.25"]
[PlyCount "58"]

1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.Nc3 cxd4 5.Nxd4 e6 6.g3 Be7 7.Bg2 O-O 8.O-O 
Bd7 9.b3 Nc6 10.Bb2 Qa5 11.Re1 Rfd8 12.Nxc6 Bxc6 13.Qe2 Rac8 14.Rad1 Nd7 
15.Nd5 Bf8 16.Nc3 b5 17.a3 Qb6 18.Kh1 a5 19.f4 b4 20.Na4 Bxa4 21.bxa4 Qc6 
22.axb4 axb4 23.a5 Qxc2 24.a6 Qxe2 25.Rxe2 Ra8 26.Ra1 Nc5 27.a7 Rd7 28.e5 
d5 29.Bd4 Nb3 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Pena Serrano, Virginio"]
[Black "Weber, Leon"]
[Result "0-1"]
[ECO "D15"]
[EventDate "1971.07.25"]
[PlyCount "58"]

1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 dxc4 5.e4 b5 6.a4 b4 7.e5 bxc3 8.exf6 cxb2
9.Bxb2 Qa5+ 10.Qd2 Qxd2+ 11.Nxd2 exf6 12.Bxc4 Bb4 13.Kd1 O-O 14.Re1 Ba6 
15.Rc1 Bxc4 16.Rxc4 a5 17.Re3 Rd8 18.Bc3 c5 19.Ke2 Bxc3 20.Rexc3 cxd4 21.
Rxd4 Nc6 22.Rxd8+ Nxd8 23.Nb3 g5 24.Kf3 Ne6 25.Kg4 Rb8 26.Kf5 Rxb3 27.Rc8+
Kg7 28.Ra8 Rb4 29.Rxa5 Rf4# 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Barle, Janez"]
[Black "Cappello, Renato"]
[Result "1-0"]
[WhiteElo "2260"]
[ECO "C09"]
[EventDate "1971.07.25"]
[PlyCount "86"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6 6.Bb5 Bd6 7.dxc5 Bxc5 8.
O-O Ne7 9.Nb3 Bd6 10.Nbd4 O-O 11.b3 Bg4 12.Bb2 Qb6 13.Nxc6 bxc6 14.Bd3 Ng6
15.h3 Bxf3 16.Qxf3 Rae8 17.Rfe1 Rxe1+ 18.Rxe1 Qa5 19.Ra1 Re8 20.Qf5 h6 21.
g3 Ba3 22.Bxa3 Qxa3 23.Qd7 Re6 24.Bf5 Qb2 25.Rd1 Rf6 26.Re1 Nf8 27.Re8 Qa3
28.Qc8 g6 29.Bd3 Qc5 30.Re2 Kg7 31.Qc7 Rd6 32.Qe7 Kg8 33.c3 a5 34.Re3 d4 
35.Bc4 Qf5 36.Re5 Qf6 37.Bxf7+ Kg7 38.Bc4+ Qxe7 39.Rxe7+ Kh8 40.cxd4 Rxd4 
41.Ra7 Nd7 42.Rxa5 Kg7 43.Ra7 Kf6 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Pena Serrano, Virginio"]
[Black "Haik, Aldo"]
[Result "0-1"]
[ECO "E60"]
[EventDate "1971.07.25"]
[PlyCount "52"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.e4 d6 6.Ne2 Nbd7 7.O-O e5 8.d5 a5 9.
Nbc3 Nc5 10.Be3 Ng4 11.Bxc5 dxc5 12.h3 Nh6 13.Qd2 f5 14.f4 Nf7 15.Rad1 Nd6
16.b3 fxe4 17.Nxe4 Nxe4 18.Bxe4 Bxh3 19.Rf2 Qd7 20.Qe3 Rae8 21.fxe5 Rxf2 
22.Qxf2 Bxe5 23.Qxc5 Qg4 24.Qe3 Bg7 25.Qf4 Rxe4 26.Qxg4 Bxg4 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Piasetski, Leon David"]
[Black "Karakasoglou, Alexandros"]
[Result "1/2-1/2"]
[ECO "C07"]
[EventDate "1971.07.25"]
[PlyCount "128"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 a6 5.Bd3 dxe4 6.Nxe4 cxd4 7.Nxd4 Be7 8.c3 
Nf6 9.Qc2 h6 10.Bf4 Nxe4 11.Bxe4 O-O 12.O-O Nd7 13.Bg3 Bh4 14.Rfd1 Bxg3 
15.hxg3 Qc7 16.Rd2 Nf6 17.Bf3 Bd7 18.Rad1 Rad8 19.c4 b6 20.b4 e5 21.Nf5 
Bxf5 22.Qxf5 Rxd2 23.Rxd2 Qxc4 24.Qxe5 Qxb4 25.Rb2 Qc5 26.Qxc5 bxc5 27.Rc2
Nd7 28.Bc6 Ne5 29.Bb7 Nd3 30.Rd2 Rb8 31.Bxa6 Nb2 32.Be2 c4 33.Rc2 Kf8 34.
f3 Ke7 35.g4 g5 36.Kh2 Kd6 37.Bxc4 Nxc4 38.Rxc4 Rb2 39.Ra4 Ke5 40.Kg3 Ke6 
41.Ra8 Kf6 42.a4 Ra2 43.a5 Kg6 44.a6 Kg7 45.Kh2 Kf6 46.Kg1 Ke5 47.g3 Kf6 
48.Kf1 Kg7 49.Ke1 Ra3 50.Ke2 Kh7 51.Kf2 Kg7 52.Kg2 Ra2+ 53.Kf1 Kh7 54.Ke1 
Ra3 55.Kf2 Kg7 56.Ke2 Kh7 57.Kd2 Rxf3 58.Rf8 Ra3 59.Rxf7+ Kg6 60.Ra7 Rxg3 
61.Ra8 Ra3 62.Kc2 Kg7 63.Kb2 Ra4 64.Kb3 Ra1 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Weber, Leon"]
[Black "Wach, Slawomir"]
[Result "0-1"]
[ECO "A56"]
[EventDate "1971.07.25"]
[PlyCount "70"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Be2 O-O 7.Nf3 Ne8 8.O-O g6 9.
a3 f5 10.b4 b6 11.bxc5 bxc5 12.Rb1 Rf7 13.Ne1 Bg5 14.Nf3 Bxc1 15.Qxc1 f4 
16.h3 g5 17.Nh2 Nf6 18.Qd1 Nbd7 19.Ng4 Kg7 20.Nxf6 Nxf6 21.Kh2 Rf8 22.Rh1 
h5 23.g3 Qe8 24.Kg2 Qg6 25.Qd3 Bd7 26.Rb7 Rf7 27.h4 Bh3+ 28.Rxh3 Rxb7 29.
hxg5 Qxg5 30.Nb5 Rd8 31.Qd1 a6 32.Nc3 Ng4 33.Qa4 Rb2 34.Qd1 f3+ 35.Bxf3 
Ne3+ 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Cappello, Renato"]
[Black "Piasetski, Leon David"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1971.07.25"]
[PlyCount "147"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Bc4 a6 7.O-O b5 8.Bb3 
Bb7 9.Re1 Be7 10.Nf5 exf5 11.Nd5 Qb8 12.Bf4 Ne5 13.Bxe5 Qxe5 14.exf5 Qxf5 
15.Qd4 Kf8 16.Re3 Re8 17.Rf3 Qg6 18.Nb6 Nf6 19.Nxd7+ Nxd7 20.Rxf7+ Qxf7 
21.Bxf7 Kxf7 22.Qxd7 Bc8 23.Qc7 Be6 24.Re1 Rd8 25.Qe5 Rd6 26.f4 Re8 27.
Qh5+ Kf8 28.Qxh7 Bg8 29.Qf5+ Rf6 30.Qg5 Bf7 31.Rf1 Rc6 32.Qf5 Bf6 33.c3 
Bg6 34.Qd7 Rec8 35.h3 a5 36.a3 Bf7 37.Re1 R8c7 38.Qf5 b4 39.axb4 axb4 40.
cxb4 Rc2 41.Ra1 Rxb2 42.Ra8+ Be8 43.Qh7 Re7 44.Qh8+ Kf7 45.Qh5+ g6 46.Qd5+
Kg7 47.Rb8 Bf7 48.Qc5 Rd7 49.Qc8 Rd8 50.Qxd8 Bxd8 51.Rxd8 Rxb4 52.g3 Be6 
53.h4 Rb3 54.Kg2 Bf5 55.Re8 Kh6 56.Rh8+ Kg7 57.Re8 Bg4 58.Re5 Rb2+ 59.Kg1 
Rb1+ 60.Kg2 Rb2+ 61.Kg1 Kf6 62.Rg5 Bf3 63.g4 Rg2+ 64.Kf1 Rxg4 65.Kf2 Rxf4 
66.Kg3 Ra4 67.Kxf3 Rxh4 68.Ra5 g5 69.Kg3 Rb4 70.Ra3 Kg6 71.Kh3 Kh5 72.Kg3 
Rb1 73.Rc3 Rg1+ 74.Kh2 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Haik, Aldo"]
[Black "Weber, Leon"]
[Result "1-0"]
[ECO "D12"]
[EventDate "1971.07.25"]
[PlyCount "109"]

1.Nf3 d5 2.c4 c6 3.d4 Nf6 4.e3 Bf5 5.Nbd2 h6 6.Be2 e6 7.O-O Be7 8.b3 O-O 
9.Bb2 Nbd7 10.Ne5 Nxe5 11.dxe5 Ne4 12.Nf3 Bb4 13.Qc1 Qa5 14.a3 Bd2 15.Qd1 
Bc3 16.b4 Qc7 17.Qb3 Bxb2 18.Qxb2 Bg4 19.cxd5 cxd5 20.Rac1 Qd7 21.Nd4 Bxe2
22.Nxe2 f6 23.f3 Ng5 24.h4 Nh7 25.Nf4 f5 26.h5 Rfc8 27.Ng6 Nf8 28.Nf4 Rxc1
29.Rxc1 Rc8 30.Rxc8 Qxc8 31.Qd4 b6 32.a4 Qc7 33.Kh2 Qc6 34.a5 Kf7 35.axb6 
axb6 36.Qa1 Qc7 37.Kh3 g5 38.hxg6+ Nxg6 39.Nxg6 Kxg6 40.Qa8 Kg7 41.f4 Qe7 
42.Qc8 Qf7 43.Kg3 Qe7 44.b5 Kh7 45.Qc6 Qg7+ 46.Kf2 Qe7 47.Qxb6 Qb4 48.Kf3 
Qe1 49.Qc7+ Kg6 50.Qd8 Qf1+ 51.Kg3 Qe1+ 52.Kh2 Qxe3 53.Qg8+ Kh5 54.Qf7+ 
Kh4 55.Qg6 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Karakasoglou, Alexandros"]
[Black "Pena Serrano, Virginio"]
[Result "1-0"]
[ECO "C79"]
[EventDate "1971.07.25"]
[PlyCount "165"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6 6.Bxc6+ bxc6 7.d4 Bg4 8.dxe5
Bxf3 9.Qxf3 dxe5 10.Nc3 Be7 11.Qg3 Qd7 12.Qxe5 O-O 13.Be3 Rfe8 14.Qd4 Qe6 
15.f3 Rad8 16.Qa4 Rb8 17.Rab1 a5 18.a3 Nd7 19.Qd4 Bf6 20.Qd2 Nb6 21.Bxb6 
cxb6 22.Rfd1 Red8 23.Qe2 Rd4 24.Rxd4 Bxd4+ 25.Kh1 Bxc3 26.bxc3 b5 27.Qd2 
a4 28.Rd1 Re8 29.Qd7 Kf8 30.Qxe6 Rxe6 31.Kg1 Ke7 32.Kf2 g5 33.Ke3 f5 34.
Rd4 h5 35.Kd3 f4 36.c4 c5 37.Rd5 b4 38.Rxc5 Rd6+ 39.Ke2 Ra6 40.Rb5 bxa3 
41.Rb1 Rc6 42.Ra1 Rxc4 43.Kd3 Rc7 44.Rxa3 Ra7 45.Kc3 Rc7+ 46.Kb2 Rc4 47.
Rc3 Rd4 48.Rc5 Kf6 49.Kc1 h4 50.c3 Rd7 51.Ra5 h3 52.gxh3 Rh7 53.Ra6+ Ke5 
54.Rg6 Rxh3 55.Rxg5+ Ke6 56.Kd2 Rxf3 57.Ra5 Rf2+ 58.Kd3 Rxh2 59.Rxa4 Rh3+ 
60.Kd4 Rh1 61.Ra6+ Ke7 62.e5 f3 63.Rf6 Rf1 64.c4 f2 65.Kc5 Kd7 66.Rd6+ Ke7
67.Rd2 Re1 68.Rxf2 Rxe5+ 69.Kc6 Re1 70.Rd2 Rc1 71.c5 Ke8 72.Kb6 Rb1+ 73.
Kc7 Ke7 74.c6 Ke8 75.Re2+ Kf7 76.Kc8 Rb3 77.c7 Rb4 78.Re5 Kf6 79.Re1 Kf7 
80.Kd7 Rd4+ 81.Kc6 Rc4+ 82.Kd6 Rd4+ 83.Kc5 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Wach, Slawomir"]
[Black "Barle, Janez"]
[Result "1-0"]
[BlackElo "2260"]
[ECO "B93"]
[EventDate "1971.07.25"]
[PlyCount "71"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Nbd7 8.a4 Be7
9.Bc4 O-O 10.O-O b6 11.Qe2 Bb7 12.fxe5 dxe5 13.Bg5 Qc7 14.Rad1 Rfc8 15.Bb3
Nc5 16.Bxf6 Bxf6 17.Nd5 Bxd5 18.Bxd5 Ra7 19.b3 Ne6 20.Bxe6 fxe6 21.c4 Raa8
22.Rd3 Rd8 23.Rfd1 a5 24.Kf1 Rxd3 25.Rxd3 Rd8 26.Rxd8+ Qxd8 27.Qd2 Qxd2 
28.Nxd2 Be7 29.Nf3 Bf6 30.Ke2 Kf7 31.c5 bxc5 32.Kd3 h5 33.h3 Ke7 34.Kc4 
Kd6 35.Kb5 Bd8 36.Nd2 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Haik, Aldo"]
[Black "Karakasoglou, Alexandros"]
[Result "1-0"]
[ECO "D77"]
[EventDate "1971.07.25"]
[PlyCount "127"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.d4 d5 5.c4 O-O 6.O-O Nc6 7.Nc3 h6 8.cxd5 
Nxd5 9.Nxd5 Qxd5 10.Ne5 Qd8 11.Nxc6 bxc6 12.Bxc6 Bh3 13.Re1 Rb8 14.d5 Bxb2
15.Bxh6 Bxa1 16.Qxa1 f6 17.Bxf8 Qxf8 18.Qd4 Qh6 19.a4 a5 20.Bb5 Kg7 21.e4 
Qh5 22.Qc3 c6 23.dxc6 Rd8 24.Be2 Bg4 25.Bxg4 Qxg4 26.c7 Rh8 27.e5 Qb4 28.
exf6+ exf6 29.Qxb4 axb4 30.Re7+ Kh6 31.Re4 Rc8 32.Rh4+ Kg7 33.Rxb4 Rxc7 
34.Kg2 Rc2 35.h4 Ra2 36.Kf3 Kf7 37.Rc4 Ke7 38.Rc7+ Ke6 39.Ra7 f5 40.a5 Kf6
41.a6 Ke6 42.Rg7 Kf6 43.Ra7 Ke6 44.Ra8 Kf7 45.Ra7+ Kf6 46.Ra8 Kg7 47.a7 
Kh7 48.Ke3 Kg7 49.f3 Ra4 50.Kd3 Ra1 51.Kd4 Ra2 52.Ke5 Ra1 53.Kf4 Ra3 54.
Kg5 Ra5 55.g4 fxg4+ 56.Kxg4 Kh7 57.f4 Kg7 58.h5 gxh5+ 59.Kh4 Ra1 60.f5 
Ra4+ 61.Kxh5 Ra5 62.Kg4 Ra4+ 63.Kf3 Ra1 64.Ke2 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Pena Serrano, Virginio"]
[Black "Cappello, Renato"]
[Result "0-1"]
[ECO "C00"]
[EventDate "1971.07.25"]
[PlyCount "30"]

1.e4 e6 2.b3 d5 3.Bb2 dxe4 4.Nc3 Nf6 5.Qe2 Be7 6.g4 Nc6 7.Nxe4 O-O 8.O-O-O
a5 9.f4 a4 10.g5 Nd5 11.Qf3 axb3 12.axb3 Ba3 13.Ne2 Qe7 14.d4 Bxb2+ 15.
Kxb2 Qa3+ 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Piasetski, Leon David"]
[Black "Wach, Slawomir"]
[Result "1-0"]
[ECO "B42"]
[EventDate "1971.07.25"]
[PlyCount "69"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Qc7 6.O-O Nf6 7.Qe2 d6 8.c4 
Nbd7 9.b3 g6 10.Bb2 Bg7 11.Nc3 O-O 12.Rac1 Nh5 13.Qe3 Qd8 14.Rfd1 Nc5 15.
Be2 Nf4 16.b4 e5 17.bxc5 Bh6 18.Kh1 exd4 19.Qxd4 Ne6 20.Qxd6 Bxc1 21.Bxc1 
Qxd6 22.cxd6 f6 23.d7 Bxd7 24.Rxd7 Nc5 25.Rd5 Rac8 26.Be3 Ne6 27.Na4 Rc6 
28.f3 Re8 29.c5 f5 30.e5 f4 31.Bg1 Nc7 32.Rd7 Rxe5 33.Bc4+ Ne6 34.Rxb7 Kf8
35.Rb6 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Weber, Leon"]
[Black "Barle, Janez"]
[Result "0-1"]
[BlackElo "2260"]
[ECO "D80"]
[EventDate "1971.07.25"]
[PlyCount "94"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Bh4 c5 6.cxd5 Nxc3 7.bxc3 Qxd5 8.e3 
Bg7 9.Qf3 Qd8 10.Bb5+ Nd7 11.Ne2 cxd4 12.exd4 O-O 13.O-O Nf6 14.Rfe1 a6 
15.Bc4 Rb8 16.Nf4 b5 17.Bb3 Bb7 18.Qe3 e6 19.Nd3 Qc8 20.Nc5 Nd5 21.Qd2 Ba8
22.c4 bxc4 23.Bxc4 Rb4 24.Rac1 Qc6 25.f3 Qb6 26.Bf2 Rc8 27.Bb3 Rd8 28.Red1
h5 29.Na4 Qd6 30.Nc5 Rb6 31.Ne4 Qe7 32.Qa5 Rdb8 33.Qc5 Qd8 34.Bg3 Rc6 35.
Qa3 Rxc1 36.Qxc1 Rc8 37.Qd2 Qb6 38.Bf2 Rc7 39.Nc5 Kh7 40.Qd3 Nb4 41.Qe2 a5
42.Na4 Qc6 43.Nc5 Nd5 44.Bg3 Bxd4+ 45.Rxd4 Qxc5 46.Bf2 Qc3 47.Rd3 Nf4 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Barle, Janez"]
[Black "Piasetski, Leon David"]
[Result "1-0"]
[WhiteElo "2260"]
[ECO "B42"]
[EventDate "1971.07.25"]
[PlyCount "117"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5 6.c3 Nc6 7.Be3 Qb6 8.Nd2 
Nxd4 9.Nc4 Qa7 10.cxd4 Bxd4 11.O-O b5 12.Nd6+ Ke7 13.Bxb5 Bxe3 14.fxe3 Nh6
15.Ba4 Qxe3+ 16.Kh1 Qc5 17.e5 Qxe5 18.Nxf7 Nxf7 19.Qf3 Nh6 20.Rae1 Qd6 21.
Qh5 Bb7 22.Qg5+ Ke8 23.Rd1 Bd5 24.Bb3 Qe7 25.Qh5+ Kd8 26.Bxd5 exd5 27.Qxd5
Ra7 28.Rc1 d6 29.Rfe1 Re8 30.Rxe7 Rexe7 31.Qxd6+ Ke8 32.h3 g6 33.Rf1 Rad7 
34.Qb8+ Rd8 35.Rf8+ Kxf8 36.Qxd8+ Kf7 37.Qd2 Nf5 38.g4 Ng3+ 39.Kg1 Ne4 40.
Qf4+ Kg7 41.Kg2 Nf6 42.Qd4 Kf7 43.Qc4+ Kg7 44.Qxa6 Nd5 45.Qa5 Ne3+ 46.Kf3 
Nc4 47.Qc3+ Ne5+ 48.Ke4 Kf6 49.h4 h6 50.Kf4 g5+ 51.hxg5+ hxg5+ 52.Kg3 Kg6 
53.Qc2+ Kg7 54.b4 Nd7 55.b5 Nf6 56.Qf5 Re3+ 57.Kf2 Re5 58.Qb1 Nxg4+ 59.Kg3
1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Cappello, Renato"]
[Black "Haik, Aldo"]
[Result "1/2-1/2"]
[ECO "B02"]
[EventDate "1971.07.25"]
[PlyCount "84"]

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 e6 7.Be3 d5 8.cxd6 
cxd6 9.Nf3 d5 10.Bd3 Nc6 11.O-O Bd7 12.Rc1 Be7 13.Bb1 Na5 14.Nd4 Qc7 15.f4
O-O-O 16.Qe2 g6 17.c4 dxc4 18.Nb3 Bc6 19.Nxa5 Qxa5 20.Qxc4 Kb8 21.Be4 Bb5 
22.Qb3 Qa4 23.Qxa4 Bxa4 24.g3 Bb5 25.Rfd1 Rxd1+ 26.Rxd1 Rd8 27.Rxd8+ Bxd8 
28.Kf2 a6 29.Bc5 Kc7 30.Ke3 Bc6 31.Bd3 Bd5 32.a3 Kc6 33.b4 Bg2 34.Kd4 h5 
35.h4 Bd5 36.Be2 Bg2 37.Bd3 Bc7 38.a4 b5 39.axb5+ axb5 40.Be2 Bd8 41.Bd3 
Bf3 42.Bf1 Bd5 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Karakasoglou, Alexandros"]
[Black "Weber, Leon"]
[Result "0-1"]
[ECO "B97"]
[EventDate "1971.07.25"]
[PlyCount "68"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 
Qxb2 9.Rb1 Qa3 10.Bxf6 gxf6 11.f5 Bh6 12.Qd3 Qc5 13.Be2 Rg8 14.O-O Nc6 15.
Kh1 Ne5 16.Qd1 Qxc3 17.fxe6 fxe6 18.Rxf6 Bg5 19.Nxe6 Nf7 20.Rxf7 Kxf7 21.
Nxg5+ Rxg5 22.Qxd6 Ke8 23.Rf1 Qg7 24.Bc4 Rg6 25.Qa3 Rf6 26.Rd1 Rf2 27.g3 
Qg4 28.Rd8+ Kxd8 29.Qa5+ Ke8 30.Qe5+ Be6 31.Qh8+ Rf8 32.Qe5 Qf3+ 33.Kg1 
Qf2+ 34.Kh1 Qe1+ 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Wach, Slawomir"]
[Black "Pena Serrano, Virginio"]
[Result "1-0"]
[ECO "B19"]
[EventDate "1971.07.25"]
[PlyCount "83"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nf3 Nd7 7.h4 h6 8.Bd3 
Bxd3 9.Qxd3 e6 10.Bd2 Qc7 11.O-O-O O-O-O 12.Qe2 Ngf6 13.Ne5 Nxe5 14.dxe5 
Nd7 15.f4 Bc5 16.Ne4 Kb8 17.Bc3 Bb6 18.Rh3 Ka8 19.Qc4 g5 20.hxg5 hxg5 21.
Rxh8 Rxh8 22.Nxg5 Be3+ 23.Kb1 Nb6 24.Qd3 Nd5 25.g3 Rd8 26.Ka1 Rd7 27.Be1 
Nb6 28.Qe2 Nc4 29.Rxd7 Qxd7 30.Bc3 Bb6 31.Qd3 Qxd3 32.cxd3 Ne3 33.Nxf7 Nf5
34.g4 Ne3 35.Nh6 Kb8 36.f5 exf5 37.gxf5 Nd5 38.e6 Kc8 39.Be5 Bc5 40.f6 Kd8
41.Nf5 Nxf6 42.Bxf6+ 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Haik, Aldo"]
[Black "Wach, Slawomir"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1971.07.25"]
[PlyCount "43"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Bd3 O-O 7.Nge2 Nh5 8.Be3 Bg5 
9.Qd2 Bxe3 10.Qxe3 g6 11.O-O-O f5 12.exf5 gxf5 13.g4 fxg4 14.Qh6 Nf6 15.h3
e4 16.Nxe4 Nxe4 17.Bxe4 Qe7 18.Ng3 gxh3 19.Nh5 Rf7 20.Bxh7+ Rxh7 21.Rhg1+ 
Kh8 22.Nf6 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Karakasoglou, Alexandros"]
[Black "Cappello, Renato"]
[Result "0-1"]
[ECO "C01"]
[EventDate "1971.07.25"]
[PlyCount "122"]

1.e4 e6 2.d4 d5 3.exd5 exd5 4.Bd3 Bd6 5.Nf3 Nf6 6.O-O O-O 7.Bg5 Bg4 8.Nbd2
Nbd7 9.c3 c6 10.Qc2 Qc7 11.Rae1 Rae8 12.Bf5 Bh5 13.Qb1 Bg6 14.Bxg6 hxg6 
15.Rxe8 Rxe8 16.Re1 Qb8 17.Bxf6 gxf6 18.h4 Kg7 19.h5 Bf4 20.hxg6 fxg6 21.
g3 Bxd2 22.Nxd2 Kf7 23.Kg2 Rxe1 24.Qxe1 Qe8 25.Qxe8+ Kxe8 26.Kf3 Kf7 27.
Kg4 Nb6 28.b3 Nc8 29.a4 Nd6 30.b4 Ke6 31.Kf4 b6 32.g4 Nf7 33.Nf3 g5+ 34.
Ke3 f5 35.Nh2 Nd6 36.f3 Nc4+ 37.Kd3 Nb2+ 38.Kc2 Nc4 39.Nf1 Kf6 40.Kb3 a6 
41.Kc2 f4 42.Kb3 Ke6 43.Kc2 Kd6 44.Kb3 Kc7 45.Kc2 Kb7 46.Kb3 a5 47.Kc2 Ka6
48.Kb3 b5 49.axb5+ Kxb5 50.bxa5 Kxa5 51.Kc2 Ka4 52.Nd2 Nxd2 53.Kxd2 Ka3 
54.Kc2 Ka2 55.c4 dxc4 56.Kc3 Kb1 57.Kxc4 Kc2 58.Kb4 Kd3 59.Kc5 Ke3 60.Kc4 
Kxf3 61.Kd3 Kxg4 0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Pena Serrano, Virginio"]
[Black "Barle, Janez"]
[Result "0-1"]
[BlackElo "2260"]
[ECO "D70"]
[EventDate "1971.07.25"]
[PlyCount "42"]

1.d4 Nf6 2.c4 g6 3.g3 d5 4.c5 Bg7 5.Bg2 O-O 6.Nc3 c6 7.e3 b6 8.a3 bxc5 9.
dxc5 Nbd7 10.b4 Ne4 11.Nxe4 Bxa1 12.Nd2 Ba6 13.Ne2 Bg7 14.Nf3 Qc7 15.O-O 
Bc4 16.Re1 a5 17.Nfd4 axb4 18.axb4 e5 19.Nc2 Rfb8 20.Bd2 Ra2 21.Qb1 Nxc5 
0-1

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Weber, Leon"]
[Black "Piasetski, Leon David"]
[Result "1/2-1/2"]
[ECO "A56"]
[EventDate "1971.07.25"]
[PlyCount "233"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.h3 Nbd7 7.Nf3 Nf8 8.Bd3 Ng6 
9.a3 Bd7 10.b4 b6 11.bxc5 bxc5 12.Rb1 Qc8 13.Qc2 h5 14.Bg5 h4 15.Qb3 Nh5 
16.Qb7 Nhf4 17.Qxc8+ Rxc8 18.Bf1 Bxg5 19.Nxg5 f6 20.Nf3 Ke7 21.g3 hxg3 22.
fxg3 Nh5 23.Kf2 Rb8 24.Bg2 a6 25.Rxb8 Rxb8 26.Rb1 Rxb1 27.Nxb1 Kd8 28.Nfd2
Ne7 29.Bf3 g6 30.Bg4 Be8 31.Nc3 Kc7 32.a4 Kb6 33.Nb3 f5 34.a5+ Kc7 35.Bf3 
Nf6 36.g4 fxg4 37.hxg4 Bd7 38.Kg3 g5 39.Nc1 Ng6 40.Bd1 Nf4 41.Bf3 Ng8 42.
Bd1 Nh6 43.Bf3 Nf7 44.Bd1 Nd8 45.Bc2 Nb7 46.Nb3 Ng6 47.Bd1 Ne7 48.Bc2 Ng8 
49.Bd1 Nf6 50.Bf3 Nd8 51.Nc1 Nf7 52.Nd3 Nh6 53.Nf2 Kd8 54.Bd1 Nh7 55.Nd3 
Nf8 56.Bf3 Ng6 57.Bd1 Nf4 58.Nc1 Ng8 59.Bf3 Nf6 60.Bd1 Kc7 61.Bf3 Kb7 62.
Bd1 Ka7 63.Bf3 Ne8 64.Bd1 Nc7 65.Ba4 Bxa4 66.Nxa4 Kb7 67.Nc3 Ne8 68.Nd1 
Nf6 69.Nf2 Kc7 70.Kf3 Ng8 71.Kg3 Nh6 72.Kf3 Nf7 73.Nfd3 Kd7 74.Ne1 Nd8 75.
Nb3 Nb7 76.Kf2 Ke7 77.Kf3 Ng6 78.Ng2 Nf8 79.Ne3 Nh7 80.Nd1 Nf6 81.Nf2 Nd8 
82.Nc1 Kd7 83.Nb3 Kc7 84.Nh3 Nf7 85.Nf2 Kb7 86.Nd1 Ne8 87.Nc1 Nc7 88.Nc3 
Nh6 89.Nb3 Ka7 90.Nc1 Kb8 91.Nb3 Ng8 92.Ke3 Kc8 93.Kf3 Kd8 94.Kg3 Kd7 95.
Kf3 Ne8 96.Nd1 Nc7 97.Nc3 Ne7 98.Nd2 Nc8 99.Ndb1 Na7 100.Na3 Kd8 101.Kg3 
Ne8 102.Nd1 Nf6 103.Nf2 Nc8 104.Nb1 Kd7 105.Kf3 Kc7 106.Nh3 Nh7 107.Nf2 
Kb7 108.Nd1 Ne7 109.Nd2 Ng6 110.Nb3 Nf4 111.Nc1 Nf8 112.Nf2 N8g6 113.Kg3 
Nh4 114.Nh3 Nxh3 115.Kxh3 Nf3 116.Nb3 Nd4 117.Nd2 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Barle, Janez"]
[Black "Haik, Aldo"]
[Result "1/2-1/2"]
[WhiteElo "2260"]
[ECO "D26"]
[EventDate "1971.07.25"]
[PlyCount "38"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O Nc6 7.Nc3 a6 8.Qe2 Be7
9.Rd1 Qc7 10.d5 exd5 11.Nxd5 Nxd5 12.Bxd5 O-O 13.b3 Bf6 14.Bb2 Bxb2 15.
Qxb2 Nb4 16.Be4 Bg4 17.a3 Bxf3 18.Bxf3 Nc6 19.Rd5 Ne7 1/2-1/2

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Cappello, Renato"]
[Black "Weber, Leon"]
[Result "1-0"]
[ECO "B98"]
[EventDate "1971.07.25"]
[PlyCount "55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.O-O-O O-O 10.Bd3 Nbd7 11.Rhe1 Nc5 12.e5 Nxd3+ 13.Rxd3 dxe5 14.fxe5 Nd5 
15.Bxe7 Nxe7 16.Qg3 Rd8 17.Ne4 Ng6 18.Nd6 Qa5 19.Kb1 f6 20.Nxc8 Raxc8 21.
exf6 gxf6 22.Rxe6 Qc5 23.c3 Kf7 24.Qf3 Qg5 25.Qxb7+ Kg8 26.Rh3 Qg4 27.
Qxh7+ Kf8 28.Rxf6+ 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Piasetski, Leon David"]
[Black "Pena Serrano, Virginio"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1971.07.25"]
[PlyCount "65"]

1.g3 d5 2.Bg2 Nf6 3.Nf3 e6 4.b3 Be7 5.Bb2 Nbd7 6.c4 b6 7.Qc2 Bb7 8.d3 c5 
9.O-O Qc7 10.Nbd2 O-O 11.Rac1 d4 12.e4 e5 13.Nh4 Bd6 14.Nf5 g6 15.Nxd6 
Qxd6 16.Qd1 Rac8 17.f4 Kg7 18.Rc2 Qe7 19.Bc1 h5 20.Nf3 Ng4 21.Qe1 f6 22.
Nh4 Rf7 23.Bf3 f5 24.Re2 fxe4 25.Bxe4 Bxe4 26.Rxe4 Re8 27.f5 Ref8 28.Nxg6 
Qd6 29.Nxf8 Qxf8 30.h3 Nh6 31.Bxh6+ Kxh6 32.Qd2+ Kh7 33.Qg5 1-0

[Event "11th World U20 ch prel. group 5"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Wach, Slawomir"]
[Black "Karakasoglou, Alexandros"]
[Result "1-0"]
[ECO "C08"]
[EventDate "1971.07.25"]
[PlyCount "89"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Bb5+ Bd7 6.Qe2+ Qe7 7.Bxd7+ Nxd7 8.
dxc5 Nxc5 9.Nb3 Nf6 10.Be3 Nxb3 11.axb3 a6 12.Rd1 Rc8 13.c3 Qe4 14.Bg5 Be7
15.Qxe4 dxe4 16.Rd4 Rd8 17.Bxf6 gxf6 18.Rxe4 Rg8 19.g3 f5 20.Re5 Rg6 21.
Nf3 Kf8 22.Rxf5 Re6+ 23.Re5 Rxe5+ 24.Nxe5 Rd5 25.Nc4 b5 26.Ne3 Re5 27.Kd2 
Bc5 28.Re1 b4 29.h4 Re8 30.Re2 Rd8+ 31.Kc2 Re8 32.Kd1 Rb8 33.c4 Re8 34.Nd5
a5 35.Nf4 Ra8 36.Nd3 Bd4 37.Re4 Bg7 38.Kc2 Bf6 39.f4 Be7 40.Re5 a4 41.bxa4
Rxa4 42.Kb3 Ra1 43.Nxb4 Rg1 44.Re3 Bc5 45.Rf3 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Hausner, Ivan"]
[Black "Buscio, Jorge"]
[Result "1-0"]
[ECO "C02"]
[EventDate "1971.07.25"]
[PlyCount "45"]

1.e4 e6 2.d4 d5 3.e5 c5 4.dxc5 Nc6 5.Nf3 Bxc5 6.Bd3 Nge7 7.O-O Ng6 8.Bxg6 
hxg6 9.Bf4 Bd7 10.Nbd2 Qb6 11.c4 Ne7 12.Rc1 Bc6 13.Nb3 Rd8 14.Bd2 Ba4 15.
Ba5 Qxa5 16.Nxa5 Bxd1 17.Rfxd1 b6 18.Nb7 Rc8 19.cxd5 exd5 20.Nd6+ Bxd6 21.
exd6 Rxc1 22.Rxc1 Ng8 23.Ne5 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Vassiades, Constantinos"]
[Black "Borngasser, Rene"]
[Result "0-1"]
[BlackElo "2340"]
[ECO "A89"]
[EventDate "1971.07.25"]
[PlyCount "48"]

1.Nf3 f5 2.d4 Nf6 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.c4 d6 7.Nc3 Nc6 8.d5 Ne5 
9.Nxe5 dxe5 10.e4 e6 11.f4 Nxe4 12.Nxe4 fxe4 13.Bxe4 exf4 14.gxf4 exd5 15.
Bxd5+ Kh8 16.Qb3 c6 17.Bg2 Re8 18.Kh1 Qb6 19.Qf3 Bf5 20.a4 Rad8 21.Ra3 Qc5
22.Be3 Qxc4 23.Bxa7 Be4 24.Qg3 Qxf1+ 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.25"]
[Round "1"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Leow, Leslie"]
[Result "0-1"]
[ECO "C02"]
[EventDate "1971.07.25"]
[PlyCount "56"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd4 7.cxd4 Bd7 8.O-O 
Nxd4 9.Nxd4 Qxd4 10.Nc3 a6 11.Re1 Ne7 12.a4 Nc6 13.Qe2 Be7 14.Kh1 Rc8 15.
f4 Nb4 16.Bb1 g6 17.Be3 Qc4 18.Qd2 O-O 19.Ne2 Nc6 20.Qd1 f6 21.a5 fxe5 22.
b3 Qb4 23.fxe5 Nxe5 24.Nd4 Ng4 25.Bxg6 e5 26.Bf5 Bxf5 27.Nxf5 Rxf5 28.Ra4 
Nxe3 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Borngasser, Rene"]
[Black "Hausner, Ivan"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[ECO "B27"]
[EventDate "1971.07.25"]
[PlyCount "37"]

1.e4 g6 2.d4 Bg7 3.Nf3 c5 4.dxc5 Qa5+ 5.c3 Qxc5 6.Be3 Qc7 7.Bd3 Nf6 8.O-O 
Nc6 9.Na3 O-O 10.Nb5 Qd8 11.c4 Ng4 12.Bc1 a6 13.Nc3 b5 14.c5 d6 15.h3 Nge5
16.Nxe5 Nxe5 17.cxd6 Qxd6 18.Be2 Qxd1 19.Rxd1 1/2-1/2

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Buscio, Jorge"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "0-1"]
[ECO "A48"]
[EventDate "1971.07.25"]
[PlyCount "118"]

1.d4 Nf6 2.Nf3 g6 3.e3 Bg7 4.Bd3 O-O 5.Nbd2 b6 6.c3 Bb7 7.Qc2 d6 8.Ne4 
Nbd7 9.Ng3 e5 10.Bd2 exd4 11.cxd4 c5 12.Bc3 Rc8 13.Qe2 Nd5 14.O-O Re8 15.
Ba6 Nf4 16.Qb5 Bc6 17.Qb3 Nh3+ 18.Kh1 cxd4 19.Nxd4 Nc5 20.Nxc6 Rxc6 21.Qb5
Qa8 22.Bxg7 Nxa6 23.Qxa6 Kxg7 24.e4 Nf4 25.Rac1 Qc8 26.Qxc8 Rexc8 27.Rcd1 
Rc2 28.Rxd6 Rxb2 29.a4 Ra2 30.Rd4 Rcc2 31.e5 Ne6 32.Rd7 Rxa4 33.h3 Nc5 34.
Rc7 Raa2 35.Kg1 b5 36.Rb1 a6 37.Rd1 b4 38.Rd6 Rxf2 39.Rf6 Rxf6 40.exf6+ 
Kxf6 41.Rxc5 b3 42.Ne4+ Ke6 43.Nc3 Rc2 44.Kh2 b2 45.Rc6+ Kd7 46.Rb6 Rxc3 
47.Rxb2 Kc7 48.g4 Rc6 49.Rf2 f6 50.Re2 Kd6 51.Re8 g5 52.Ra8 Kc5 53.Kg3 Kb5
54.Kf3 a5 55.Ke4 a4 56.Kd5 Ra6 57.Rb8+ Rb6 58.Ra8 Kb4 59.Ra7 a3 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.26"]
[Round "2"]
[White "Gresh, Nohad"]
[Black "Vassiades, Constantinos"]
[Result "1/2-1/2"]
[ECO "D87"]
[EventDate "1971.07.25"]
[PlyCount "47"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 c5 7.Bc4 Bg7 8.Be3 
O-O 9.Ne2 Nc6 10.O-O Qc7 11.Rc1 Rd8 12.h3 b6 13.Qe1 Na5 14.Bb3 e6 15.f4 
Bb7 16.e5 Nxb3 17.axb3 cxd4 18.Nxd4 a6 19.Qf2 Rd7 20.c4 Bf8 21.Nc2 Bc5 22.
b4 Bxe3 23.Nxe3 Rad8 24.Rfd1 1/2-1/2

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Hausner, Ivan"]
[Black "Gresh, Nohad"]
[Result "1-0"]
[ECO "B99"]
[EventDate "1971.07.25"]
[PlyCount "85"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.O-O-O Nbd7 10.g4 b5 11.Bxf6 gxf6 12.f5 Ne5 13.Qh3 O-O 14.Nce2 Kh8 15.Nf4
Rg8 16.Be2 Qb7 17.Qe3 Nc4 18.Bxc4 bxc4 19.fxe6 fxe6 20.Ndxe6 Bxe6 21.Nxe6 
Rxg4 22.Nf4 Rb8 23.b3 cxb3 24.axb3 Re8 25.Rhg1 Rxg1 26.Rxg1 Bf8 27.Qh3 
Qxe4 28.Ng6+ Kg8 29.Ne7+ Kf7 30.Nf5 Rc8 31.Qxh7+ Ke6 32.Ng7+ Ke5 33.Qh5+ 
f5 34.Qd1 Rxc2+ 35.Qxc2 Qe3+ 36.Kb2 Qxg1 37.Qxf5+ Kd4 38.Ne6+ Ke3 39.Qf4+ 
Ke2 40.Nxf8 Qg7+ 41.Ka2 Kd3 42.Qxd6+ Kc2 43.Qg6+ 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Leow, Leslie"]
[Black "Buscio, Jorge"]
[Result "1/2-1/2"]
[ECO "B28"]
[EventDate "1971.07.25"]
[PlyCount "45"]

1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 d6 6.Nc3 e6 7.Be3 Nf6 8.Be2 Be7
9.O-O O-O 10.Qd2 Bd7 11.Nc2 Rc8 12.f4 Na5 13.Na3 d5 14.cxd5 Bxa3 15.bxa3 
exd5 16.Nxd5 Nxe4 17.Qb4 Re8 18.Bb6 Qh4 19.Qxa5 Rc2 20.Bd3 Rxg2+ 21.Kxg2 
Qg4+ 22.Kh1 Ng3+ 23.Kg2 1/2-1/2

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.27"]
[Round "3"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Borngasser, Rene"]
[Result "0-1"]
[BlackElo "2340"]
[ECO "A90"]
[EventDate "1971.07.25"]
[PlyCount "90"]

1.d4 e6 2.c4 f5 3.Nc3 Nf6 4.g3 Bb4 5.Bg2 O-O 6.a3 Bxc3+ 7.bxc3 d6 8.Nf3 
Nc6 9.O-O Na5 10.Qd3 b6 11.Bg5 Ba6 12.Nd2 Rb8 13.d5 Qe8 14.Bxf6 Rxf6 15.
dxe6 Kh8 16.Rfe1 Qxe6 17.Qd5 Re8 18.e4 f4 19.Bf1 Bb7 20.Qd4 Nc6 21.Qd5 Qc8
22.Qh5 Ne5 23.gxf4 Rxf4 24.Re3 Ref8 25.Bh3 Qd8 26.Rf1 Rh4 27.Qe2 Qf6 28.
Rg3 Qh6 29.Kg2 Ng6 30.f4 Nxf4+ 31.Kh1 Rxh3 32.Rg4 Ng6 33.Rfg1 Qe3 34.Qd1 
Rf2 35.R1g2 Rxg2 36.Kxg2 Ne5 37.Nf1 Qh6 38.Qa4 Nc6 39.Qb5 Rh5 40.Qb2 Rg5 
41.h3 Rxg4+ 42.hxg4 Qf4 43.Ng3 Ne5 44.Qe2 Qxg4 45.Qe3 h6 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Borngasser, Rene"]
[Black "Leow, Leslie"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[ECO "C00"]
[EventDate "1971.07.25"]
[PlyCount "61"]

1.e4 e6 2.d3 d5 3.Nd2 c5 4.Ngf3 Nc6 5.g3 Nge7 6.b3 g6 7.Bb2 d4 8.c3 Bg7 9.
cxd4 Nxd4 10.Nxd4 cxd4 11.Bg2 O-O 12.O-O e5 13.b4 a5 14.b5 Be6 15.Qa4 Nc8 
16.Ba3 Re8 17.f4 Nb6 18.Qd1 f6 19.f5 Bf7 20.fxg6 hxg6 21.Bh3 Bf8 22.Bc1 a4
23.Nf3 a3 24.Nh4 Bg7 25.Bd2 Nd7 26.Nf3 Nc5 27.Qc2 Ne6 28.Rab1 Rc8 29.Qa4 
Ra8 30.Qc2 Rc8 31.Qa4 1/2-1/2

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Gresh, Nohad"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "0-1"]
[ECO "A67"]
[EventDate "1971.07.25"]
[PlyCount "84"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+ Bd7 
9.e5 Qe7 10.Nf3 O-O 11.O-O Ne8 12.Re1 Bxb5 13.Nxb5 Qd7 14.a4 a6 15.Na3 b5 
16.Be3 Nc7 17.Rc1 Rd8 18.exd6 Qxd6 19.Bxc5 Qxd5 20.Bb6 Qxd1 21.Rexd1 Rxd1+
22.Rxd1 Ne6 23.Ng5 Bxb2 24.Nxe6 fxe6 25.Rd8+ Kf7 26.Bc5 e5 27.Bd6 exf4 28.
Nc2 bxa4 29.Rxb8 Rxb8 30.Bxb8 Ke6 31.Bxf4 Kd5 32.Kf1 Kc4 33.Ke1 a3 34.Kd1 
a2 35.g4 a1=Q+ 36.Nxa1 Bxa1 37.h4 Kb3 38.h5 a5 39.hxg6 hxg6 40.Kc1 a4 41.
Kb1 Bc3 42.Bc1 g5 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.28"]
[Round "4"]
[White "Vassiades, Constantinos"]
[Black "Hausner, Ivan"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1971.07.25"]
[PlyCount "60"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 Nc6 4.d4 Bf5 5.O-O Qd7 6.b3 Bh3 7.c4 Bxg2 8.Kxg2 
O-O-O 9.cxd5 Qxd5 10.Bb2 Ne4 11.Nc3 Nxc3 12.Bxc3 g5 13.Kg1 Bg7 14.e3 h5 
15.h4 gxh4 16.Nxh4 Bf6 17.Qf3 Qd7 18.Qf5 Qxf5 19.Nxf5 e6 20.Nh4 Bxh4 21.
gxh4 Rhg8+ 22.Kh2 Rg4 23.Kh3 Rdg8 24.Be1 Ne7 25.f3 Rg2 26.Bf2 R8g6 27.e4 
Nc6 28.Rad1 e5 29.d5 Nd4 30.Rd3 Ne2 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Buscio, Jorge"]
[Black "Borngasser, Rene"]
[Result "0-1"]
[BlackElo "2340"]
[ECO "A89"]
[EventDate "1971.07.25"]
[PlyCount "84"]

1.c4 f5 2.g3 Nf6 3.Bg2 g6 4.Nf3 Bg7 5.O-O O-O 6.d4 d6 7.Nc3 Nc6 8.Rb1 e5 
9.dxe5 dxe5 10.b4 e4 11.Nd2 Be6 12.Qb3 Ng4 13.h3 Nge5 14.Nb5 a6 15.Na3 b5 
16.Qe3 bxc4 17.Bb2 Qe7 18.Rfc1 Nxb4 19.Naxc4 Nd5 20.Qa3 Qxa3 21.Bxa3 Rfb8 
22.Nxe5 Bxe5 23.Rxb8+ Rxb8 24.Rc6 Rb6 25.Rxb6 Nxb6 26.f3 exf3 27.exf3 Bxg3
28.Bf1 a5 29.Nb3 a4 30.Nc1 Bf4 31.Nd3 Be3+ 32.Kg2 Bxa2 33.Ne5 c5 34.Bb5 c4
35.Kf1 Bf4 36.Bb2 a3 37.Bd4 Bb3 38.Ke2 a2 39.Be8 Na4 40.Bf7+ Kf8 41.Bd5 
Bxe5 42.Bxe5 c3 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Leow, Leslie"]
[Black "Gresh, Nohad"]
[Result "1-0"]
[ECO "B93"]
[EventDate "1971.07.25"]
[PlyCount "57"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Qc7 8.Bd3 Be7
9.O-O b5 10.Qe1 O-O 11.Kh1 Bb7 12.a3 Nbd7 13.Nh4 Rfe8 14.Nf5 Bf8 15.Qg3 g6
16.fxe5 Nh5 17.Qf2 Nxe5 18.Be2 gxf5 19.Bxh5 fxe4 20.Be3 Ng6 21.Ne2 Bg7 22.
Nd4 Bxd4 23.Bxd4 Qe7 24.Qe3 Bd5 25.Rf5 Ne5 26.Qh6 Kh8 27.Raf1 e3 28.Rxf7 
Rg8 29.Qxh7# 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.29"]
[Round "5"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Vassiades, Constantinos"]
[Result "1-0"]
[ECO "B33"]
[EventDate "1971.07.25"]
[PlyCount "71"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nb3 Bb4 7.Bd3 d5 8.Nd2 
Bxc3 9.bxc3 dxe4 10.Nxe4 Nxe4 11.Bxe4 Qxd1+ 12.Kxd1 O-O 13.Ke2 Be6 14.Rd1 
Rfd8 15.Rxd8+ Rxd8 16.Be3 Bd5 17.f3 b6 18.Bxd5 Rxd5 19.c4 Rd8 20.Rb1 g6 
21.c3 Ne7 22.Bg5 Rd7 23.Rb5 Nc6 24.Rd5 Rxd5 25.cxd5 Nb8 26.Kd3 Nd7 27.Kc4 
f6 28.Be3 a6 29.d6 Kf7 30.Kd5 h5 31.Kc6 Ke6 32.c4 f5 33.Bxb6 Nxb6 34.Kxb6 
Kxd6 35.c5+ Kd7 36.Kb7 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Gresh, Nohad"]
[Black "Buscio, Jorge"]
[Result "1/2-1/2"]
[ECO "E01"]
[EventDate "1971.07.25"]
[PlyCount "89"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c6 5.Nf3 Nbd7 6.O-O Bd6 7.Nc3 O-O 8.Qd3 Re8
9.e4 dxc4 10.Qxc4 e5 11.Rd1 Nb6 12.Qe2 exd4 13.Rxd4 Qc7 14.Bg5 Ng4 15.Rc1 
a6 16.a4 Qb8 17.Qd2 h6 18.Rxd6 Nc4 19.Rd8 Nxd2 20.Rxe8+ Kh7 21.Bxd2 Qa7 
22.Nd1 Be6 23.Re7 Rd8 24.h3 Nf6 25.Be3 Qa8 26.Nd4 Rd7 27.Rxd7 Bxd7 28.Nc3 
Qf8 29.e5 Ne8 30.Ne4 Qb4 31.b3 Nc7 32.Rc4 Qe1+ 33.Kh2 Be6 34.Nxe6 Nxe6 35.
Nd6 Qd1 36.Be4+ Kg8 37.Nxb7 Qxb3 38.Na5 Qb2 39.Rxc6 Qxe5 40.Rc8+ Nf8 41.
Bc2 Qxa5 42.Bc5 g6 43.Bxf8 Kh7 44.Bc5 Qc3 45.Be4 1/2-1/2

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Hausner, Ivan"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "1-0"]
[ECO "B35"]
[EventDate "1971.07.25"]
[PlyCount "89"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Bc4 
Nc6 9.Bb3 Nxd4 10.Bxd4 Be6 11.Qd2 Qa5 12.O-O-O Bxb3 13.cxb3 Rfc8 14.Kb1 
Rc6 15.g4 Rac8 16.h4 h5 17.g5 Ne8 18.Bxg7 Nxg7 19.f4 e6 20.Nd5 Qxd2 21.
Nf6+ Kf8 22.Rxd2 Ne8 23.Rhd1 Ke7 24.e5 d5 25.f5 R8c7 26.Rf2 Rc5 27.fxg6 
fxg6 28.Rdf1 d4 29.Nxe8 Kxe8 30.Rf6 Rxe5 31.Rxg6 Rf7 32.Rgf6 Rxf6 33.Rxf6 
Ke7 34.Rf4 Rd5 35.g6 Rd8 36.Rf7+ Kd6 37.Kc2 Rg8 38.g7 Kc6 39.Kd3 e5 40.Ke4
a6 41.Rf6+ Kd7 42.Rb6 Kc7 43.Rg6 b6 44.Kxe5 d3 45.Kf6 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.07.30"]
[Round "6"]
[White "Vassiades, Constantinos"]
[Black "Leow, Leslie"]
[Result "0-1"]
[ECO "A46"]
[EventDate "1971.07.25"]
[PlyCount "76"]

1.Nf3 Nf6 2.g3 b5 3.d4 Bb7 4.Bg2 d6 5.c4 bxc4 6.Qa4+ Nbd7 7.Qxc4 Bd5 8.Qa4
e6 9.Nc3 Bb7 10.O-O Be7 11.Re1 O-O 12.e4 c5 13.e5 Nd5 14.Nxd5 Bxd5 15.Bf4 
Nb6 16.Qd1 c4 17.Qd2 Rb8 18.b3 Rb7 19.Rab1 cxb3 20.axb3 dxe5 21.dxe5 Nd7 
22.Qd1 Nc5 23.b4 Na6 24.b5 Nc7 25.Qa4 Qd7 26.Nd4 Bxg2 27.Kxg2 a6 28.Nc6 
axb5 29.Nxe7+ Qxe7 30.Qb3 Nd5 31.Bd2 b4 32.Rec1 h6 33.Be3 Rc7 34.Rxc7 Qxc7
35.Rc1 Qxe5 36.Rc5 Nxe3+ 37.Qxe3 Qxe3 38.fxe3 Rb8 0-1

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Borngasser, Rene"]
[Black "Gresh, Nohad"]
[Result "1-0"]
[WhiteElo "2340"]
[ECO "D04"]
[EventDate "1971.07.25"]
[PlyCount "61"]

1.d4 Nf6 2.Nf3 c5 3.e3 d5 4.b3 Nc6 5.Bb2 Bg4 6.Nbd2 cxd4 7.exd4 e6 8.Bd3 
Bd6 9.O-O O-O 10.a3 e5 11.dxe5 Bxe5 12.c3 Rc8 13.b4 Bb8 14.h3 Bh5 15.Bf5 
Rc7 16.Re1 Ne7 17.Bd3 Qd7 18.Qb3 Bxf3 19.Nxf3 Ng6 20.c4 dxc4 21.Bxc4 Rfc8 
22.Rad1 Qf5 23.Rd4 a5 24.g4 Nxg4 25.hxg4 Qf6 26.bxa5 Nh4 27.Nxh4 Qxh4 28.
Rde4 h6 29.Re8+ Kh7 30.Qd3+ g6 31.R1e7 1-0

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Buscio, Jorge"]
[Black "Vassiades, Constantinos"]
[Result "1/2-1/2"]
[ECO "D87"]
[EventDate "1971.07.25"]
[PlyCount "23"]

1.c4 Nf6 2.Nc3 g6 3.d4 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 c5 7.Be3 Bg7 8.Bc4 
O-O 9.Ne2 Nc6 10.O-O Qc7 11.Rc1 Rd8 12.Qd2 1/2-1/2

[Event "11th World U20 ch prel. group 6"]
[Site "Athens GRE"]
[Date "1971.08.01"]
[Round "7"]
[White "Leow, Leslie"]
[Black "Hausner, Ivan"]
[Result "0-1"]
[ECO "B04"]
[EventDate "1971.07.25"]
[PlyCount "100"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 c6 6.O-O Bg7 7.Bb3 O-O 8.c4 Nc7 
9.h3 d5 10.Nc3 h6 11.Be3 Be6 12.c5 f5 13.Nh2 Nd7 14.Qd2 Kh7 15.Ba4 Bg8 16.
b4 Ne6 17.Ne2 Qc7 18.Rac1 a6 19.Bb3 Rad8 20.Rc2 Rf7 21.a4 Ndf8 22.Rcc1 Qd7
23.Rb1 Nc7 24.Bc2 Nfe6 25.Bd3 Rdf8 26.g4 Kh8 27.f3 h5 28.gxh5 gxh5 29.Qe1 
Bh7 30.Qh4 f4 31.Bxh7 Kxh7 32.Qxh5+ Kg8 33.Bd2 Rf5 34.Qh4 Qe8 35.Kg2 Rh5 
36.Qf2 Qg6+ 37.Ng4 Qh7 38.Rh1 Rxh3 39.Rxh3 Qxb1 40.Nh6+ Bxh6 41.Rxh6 Rf7 
42.Qh4 Rg7+ 43.Kf2 Qf5 44.Bxf4 Kf7 45.Rh8 Qg6 46.Rb8 Nxd4 47.Qg4 Qh7 48.
Qc8 Qc2 49.e6+ Ncxe6 50.Qe8+ Kf6 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Borngasser, Rene"]
[Black "Ribli, Zoltan"]
[Result "1-0"]
[WhiteElo "2340"]
[BlackElo "2440"]
[ECO "A48"]
[EventDate "1971.08.02"]
[PlyCount "113"]

1.d4 Nf6 2.Nf3 g6 3.Nbd2 Bg7 4.e4 d6 5.Bd3 O-O 6.O-O Nc6 7.Re1 e5 8.dxe5 
dxe5 9.Nc4 Nh5 10.Be3 Qe7 11.c3 a5 12.a4 h6 13.Nfd2 Be6 14.f3 Rad8 15.Qc2 
b6 16.Rad1 Kh7 17.Bf1 Bf6 18.Bf2 Nf4 19.Ne3 Bg7 20.Kh1 Kh8 21.Ndc4 Qg5 22.
Rxd8 Rxd8 23.Rd1 Rxd1 24.Qxd1 f5 25.Qc1 Qd8 26.Qd2 Qg8 27.g3 fxe4 28.fxe4 
Nh3 29.Bxh3 Bxh3 30.Kg1 Nd8 31.Nd5 Ne6 32.Be3 Kh7 33.Qf2 Qd8 34.Qf7 Ng5 
35.Bxg5 Qxg5 36.Kf2 h5 37.Nce3 c6 38.Qe7 Qxe7 39.Nxe7 Bd7 40.Nc4 b5 41.
axb5 cxb5 42.Nxa5 Bf8 43.Nd5 Bc5+ 44.Ke2 Bg4+ 45.Kd3 Bg1 46.Nf6+ Kg7 47.
Nxg4 hxg4 48.Ke2 Kf6 49.b4 Ke6 50.Nb3 Kd6 51.Na1 Kc6 52.Nc2 Kd6 53.Ne3 
Bxe3 54.Kxe3 Kc7 55.Kd3 Kb6 56.c4 Kc6 57.cxb5+ 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Haik, Aldo"]
[Black "Torre, Eugenio"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[ECO "B02"]
[EventDate "1971.08.02"]
[PlyCount "49"]

1.e4 Nf6 2.e5 Nd5 3.Nc3 Nxc3 4.bxc3 d5 5.Ba3 b6 6.f4 c5 7.d4 e6 8.Nf3 Qd7 
9.Rb1 Ba6 10.Bxa6 Nxa6 11.O-O g6 12.Qe2 Qa4 13.f5 gxf5 14.Ng5 h6 15.Nxf7 
Kxf7 16.g4 Qxa3 17.gxf5 Rg8+ 18.Kh1 Rg7 19.Qh5+ Kg8 20.f6 Qxc3 21.fxg7 
Bxg7 22.Rf7 Qe3 23.Rg1 Qe4+ 24.Rg2 Qe1+ 25.Rg1 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Ogaard, Leif"]
[Black "Hug, Werner"]
[Result "0-1"]
[WhiteElo "2340"]
[ECO "A77"]
[EventDate "1971.08.02"]
[PlyCount "84"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 d6 5.Nf3 Bg7 6.e4 O-O 7.Be2 e6 8.O-O exd5 
9.cxd5 Re8 10.Nd2 Nbd7 11.Re1 Ne5 12.Nf1 a6 13.a4 Qc7 14.a5 c4 15.Be3 Bd7 
16.Bb6 Qc8 17.f4 Neg4 18.h3 Nh6 19.Bf3 Bb5 20.g4 Nd7 21.g5 Nxb6 22.axb6 
Qxh3 23.Ne3 Qg3+ 24.Ng2 Bxc3 25.bxc3 Nf5 26.exf5 Rxe1+ 27.Qxe1 Qxf3 28.Qd2
Qd3 29.Qxd3 cxd3 30.Kf2 Rc8 31.Ra3 Rc5 32.Ne3 d2 33.Ra1 Rxc3 34.Rd1 Rd3 
35.Nf1 Rxd5 36.Rxd2 Rxf5 37.Ne3 Rxf4+ 38.Kg3 Re4 39.Ng4 Re6 40.Rh2 h5 41.
Nf6+ Kg7 42.Rc2 Re5 {time} 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Pinal Borges, Nelson"]
[Black "Barle, Janez"]
[Result "1-0"]
[BlackElo "2260"]
[ECO "C03"]
[EventDate "1971.08.02"]
[PlyCount "67"]

1.e4 e6 2.d4 d5 3.Nd2 b6 4.Ngf3 Nf6 5.e5 Nfd7 6.Bd3 c5 7.c3 Ba6 8.Bxa6 
Nxa6 9.O-O Be7 10.Re1 O-O 11.Nf1 b5 12.Bf4 b4 13.Qe2 Qb6 14.Bg5 Bxg5 15.
Nxg5 bxc3 16.Qd3 g6 17.Qh3 h5 18.bxc3 Kg7 19.Ng3 Rh8 20.Ne2 Rab8 21.Nf4 
Nf8 22.Qf3 Rb7 23.Qd3 c4 24.Qc2 Qd8 25.h4 Nc7 26.Reb1 Rb6 27.a4 f6 28.
exf6+ Qxf6 29.g3 Nd7 30.a5 Rc6 31.Rb7 e5 32.Rxc7 Rxc7 33.Nfe6+ Kg8 34.Nxc7
1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Rogoff, Kenneth"]
[Black "Hausner, Ivan"]
[Result "1-0"]
[WhiteElo "2425"]
[ECO "B51"]
[EventDate "1971.08.02"]
[PlyCount "105"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Nd7 4.d4 Nf6 5.Nc3 cxd4 6.Qxd4 g6 7.Bg5 Bg7 8.Qd2 
O-O 9.Bh6 Nc5 10.Bxg7 Kxg7 11.Bd3 Bg4 12.Nd4 e5 13.Nb3 Rc8 14.Qe3 Be6 15.
Rd1 Qb6 16.Nxc5 dxc5 17.Qc1 Rfd8 18.O-O Rd4 19.Rfe1 Bg4 20.Be2 Bxe2 21.
Rxe2 Rcd8 22.Rde1 c4 23.Nb1 Qd6 24.f3 Nh5 25.g3 Nf6 26.Kg2 b5 27.Nc3 Qc6 
28.a3 a5 29.Qg5 Qc5 30.Qe3 b4 31.axb4 axb4 32.Na2 Qb5 33.Nxb4 R4d6 34.c3 
Nd7 35.Rd2 Nc5 36.Red1 Nd3 37.Nxd3 cxd3 38.b4 Qc4 39.Qc5 Qe6 40.b5 Rc8 41.
Qb4 Rc4 42.Qb3 f5 43.Rxd3 Rxd3 44.Rxd3 fxe4 45.fxe4 Qc8 46.Rf3 Kh6 47.b6 
Rxe4 48.b7 Qc6 49.Qb2 Qc4 50.b8=Q Re2+ 51.Qxe2 Qxe2+ 52.Rf2 Qe4+ 53.Kh3 
1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Vaganian, Rafael"]
[Black "Poutiainen, Pertti"]
[Result "1-0"]
[WhiteElo "2510"]
[ECO "E62"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nc6 7.O-O e5 8.d5 Na5 
9.Nd2 c6 10.dxc6 Nxc6 11.Nde4 Ne8 12.Nb5 Nd4 13.Bg5 f6 14.Nxd4 exd4 15.Bf4
f5 16.Ng5 Qf6 17.Bd5+ Kh8 18.Nf3 h6 19.h4 Nc7 20.Qd2 Kh7 21.Rfd1 Nxd5 22.
cxd5 Qf7 23.Bxd6 Rd8 24.Bc5 Rxd5 25.Bxd4 Be6 26.Qf4 Rad8 27.Rd2 Rc8 28.
Rad1 Ra5 29.b3 Ra6 30.Bxg7 Qxg7 31.Rd6 Rxd6 32.Rxd6 Bd7 33.Ne5 Be8 34.h5 
Rc5 35.hxg6+ 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Barle, Janez"]
[Black "Poutiainen, Pertti"]
[Result "1-0"]
[WhiteElo "2260"]
[ECO "B06"]
[EventDate "1971.08.02"]
[PlyCount "89"]

1.e4 g6 2.d4 Bg7 3.c3 d6 4.f4 Nh6 5.Nf3 O-O 6.Bd3 c5 7.O-O cxd4 8.cxd4 Nc6
9.d5 Nb4 10.Bc4 Bd7 11.Nc3 Rc8 12.Bb3 Ng4 13.Qe2 Qb6+ 14.Kh1 Rxc3 15.bxc3 
Bb5 16.c4 Bxa1 17.cxb5 Rc8 18.h3 Nd3 19.Qxd3 Nf2+ 20.Rxf2 Qxf2 21.Be3 Qb2 
22.Kh2 Qf6 23.Nd2 g5 24.fxg5 Qe5+ 25.g3 Qb2 26.Qb1 Qc3 27.Qe1 Qd3 28.Bf4 
Bd4 29.Qf1 Qc3 30.Nc4 Qb4 31.Qd3 Bf2 32.Kg2 Bc5 33.Ne3 Bb6 34.Nf5 Rc3 35.
Bd2 Qc5 36.Qf1 Rd3 37.Bc1 f6 38.Nxe7+ Kf7 39.Nf5 Rc3 40.Bd2 Rd3 41.Bb4 
Qxb4 42.Qxd3 Qe1 43.Nd4 Qa1 44.Nf3 Qb2+ 45.Qd2 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Hausner, Ivan"]
[Black "Ogaard, Leif"]
[Result "1-0"]
[BlackElo "2340"]
[ECO "B23"]
[EventDate "1971.08.02"]
[PlyCount "77"]

1.e4 c5 2.Nc3 Nc6 3.f4 e6 4.Nf3 d5 5.e5 d4 6.Ne4 f5 7.Nf2 Nh6 8.Bc4 Be7 9.
O-O Bd7 10.c3 Qb6 11.b3 O-O-O 12.Ba3 dxc3 13.d4 Kb8 14.Rc1 Nxd4 15.Nxd4 
Bc8 16.Rxc3 cxd4 17.Bxe7 dxc3 18.Bxd8 Rxd8 19.Qc1 Rd2 20.Qxc3 Rxa2 21.h3 
Nf7 22.Qg3 g5 23.fxg5 Qd4 24.h4 Rd2 25.h5 f4 26.Qh4 Qxe5 27.Nh3 Rd4 28.Qf2
f3 29.Re1 Qg7 30.Qxf3 Nd6 31.Bxe6 Bxe6 32.Rxe6 Rd2 33.Qf4 Rd4 34.Qf6 Rd1+ 
35.Kh2 Qc7 36.Qe5 a5 37.g6 hxg6 38.hxg6 Qb6 39.g7 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Hug, Werner"]
[Black "Vaganian, Rafael"]
[Result "1-0"]
[BlackElo "2510"]
[ECO "A04"]
[EventDate "1971.08.02"]
[PlyCount "93"]

1.e4 e6 2.d3 c5 3.Nf3 Nc6 4.g3 g6 5.Bg2 Bg7 6.O-O Nge7 7.Re1 O-O 8.Nbd2 
Qc7 9.a4 d5 10.exd5 Nxd5 11.Nc4 b6 12.c3 Bb7 13.Ng5 Rad8 14.Qg4 h6 15.Nf3 
e5 16.Qh4 g5 17.Bxg5 hxg5 18.Nxg5 Rfe8 19.Bxd5 Rxd5 20.Ne3 Qd8 21.Qh7+ Kf8
22.Qh5 Rd7 23.Nf5 Rc7 24.Re4 Bc8 25.Nh7+ Kg8 26.Nh6+ Bxh6 27.Qxh6 f5 28.
Nf6+ Kf7 29.Nxe8 Kxe8 30.Rh4 Kd7 31.Qg6 Ne7 32.Rh7 Rc6 33.Qxf5+ Re6 34.Re1
Kd6 35.Qg5 Qf8 36.f4 exf4 37.Rxe6+ Bxe6 38.gxf4 Nf5 39.Rxa7 Qh8 40.a5 Kc6 
41.Qg6 Nd4 42.cxd4 Qxd4+ 43.Kg2 Qxb2+ 44.Kg3 Kd6 45.Ra6 Qd4 46.Rxb6+ Kc7 
47.Qxe6 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Pinal Borges, Nelson"]
[Black "Borngasser, Rene"]
[Result "0-1"]
[BlackElo "2340"]
[ECO "C00"]
[EventDate "1971.08.02"]
[PlyCount "130"]

1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.g3 Nc6 5.Bg2 dxe4 6.dxe4 e5 7.Ngf3 Bc5 8.O-O 
O-O 9.c3 Qd3 10.Ne1 Qd6 11.Qc2 Be6 12.Nef3 h6 13.Nh4 Rfd8 14.Nf5 Qd3 15.
Qxd3 Rxd3 16.Nb3 Bf8 17.Be3 b6 18.Rfd1 Rxd1+ 19.Rxd1 a5 20.f3 a4 21.Nc1 
Na5 22.Bf1 Nd7 23.Bf2 Nc5 24.Ne3 c6 25.Kg2 b5 26.Be2 Ncb7 27.f4 exf4 28.
gxf4 f6 29.Kf3 Nd6 30.Bd3 Ndc4 31.Nxc4 Nxc4 32.Bxc4 Bxc4 33.Rd7 Bf7 34.a3 
Bh5+ 35.Kg3 Be8 36.Rd2 c5 37.Nd3 Rd8 38.Be3 Bc6 39.Nf2 Re8 40.Re2 Kf7 41.
Bd2 f5 42.e5 Ke6 43.Bc1 Rd8 44.Rd2 Rxd2 45.Bxd2 Kd5 46.Nd3 Kc4 47.Nc1 Be7 
48.h3 Be4 49.Be1 Kd5 50.Bd2 Bc2 51.Kf3 g5 52.Ne2 Bd1 53.Ke3 Bxe2 54.Kxe2 
Ke4 55.fxg5 hxg5 56.e6 Kd5 57.Kd3 c4+ 58.Ke3 Kxe6 59.Kd4 Kd6 60.Be1 Bf6+ 
61.Ke3 Kd5 62.Kf3 Bg7 63.Bd2 g4+ 64.hxg4 fxg4+ 65.Ke2 Ke4 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Ribli, Zoltan"]
[Black "Haik, Aldo"]
[Result "1/2-1/2"]
[WhiteElo "2440"]
[ECO "E67"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.c4 d6 6.d4 Nbd7 7.Nc3 e5 8.b3 Re8 
9.Qc2 c6 10.Rd1 Qc7 11.e4 b5 12.Ba3 Bf8 13.cxb5 cxb5 14.Qd3 a6 15.dxe5 
dxe5 16.Bxf8 Nxf8 17.Rac1 Qa7 18.Qd6 Kg7 19.Qb4 Bg4 20.Nd5 Bxf3 21.Bxf3 
Rad8 22.Nxf6 Kxf6 23.Rc6+ Ne6 24.Rxd8 Rxd8 25.Bg4 Qb7 26.Qc5 Rc8 27.Rb6 
Rxc5 28.Rxb7 Rc1+ 29.Kg2 Ra1 30.Bxe6 fxe6 31.Rxh7 Rxa2 32.h4 Rb2 33.g4 g5 
34.h5 Rxb3 35.Ra7 Rb4 36.f3 Rb2+ 37.Kg3 b4 38.Rxa6 Rb1 39.Rb6 Rb2 40.Rb7 
Rb3 41.h6 Rb1 42.h7 Rh1 43.Kg2 Rh4 44.Kf2 b3 45.Ke3 b2 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Torre, Eugenio"]
[Black "Rogoff, Kenneth"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[BlackElo "2425"]
[ECO "C43"]
[EventDate "1971.08.02"]
[PlyCount "124"]

1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Nd7 6.Nxd7 Bxd7 7.O-O Be7 8.
Re1 O-O 9.Bxe4 dxe4 10.Rxe4 Bc6 11.d5 Bf6 12.c4 Bd7 13.Nc3 Bxc3 14.bxc3 
Bf5 15.Re5 Qd7 16.Qd4 c6 17.Re1 Rfe8 18.Bf4 b6 19.c5 Rxe1+ 20.Rxe1 Re8 21.
Rxe8+ Qxe8 22.h3 f6 23.cxb6 axb6 24.Qxb6 cxd5 25.Qd4 Qc6 26.a4 Bc8 27.a5 
h6 28.Be3 Kh7 29.Qc5 Qa8 30.Bd4 Ba6 31.Qc7 Kg8 32.f3 Bc4 33.Bb6 Kh7 34.Bc5
Qe8 35.Bd4 Kh8 36.Qd6 Qc8 37.Qe7 Qc6 38.Qd8+ Kh7 39.Qb8 Qa4 40.Qc7 Kg6 41.
Kh2 Qa2 42.h4 h5 43.Bb6 Qe2 44.Bd4 Qa2 45.Bc5 Bf1 46.Qg3+ Kf7 47.Bb6 Qa4 
48.Qf2 Qf4+ 49.Qg3 Qd2 50.Bd4 Bc4 51.Qc7+ Kg6 52.Qb8 Qe2 53.Bc5 Qe5+ 54.
Qxe5 fxe5 55.Kg3 Kf5 56.Kf2 g6 57.Ke3 Ba6 58.Bd6 Ke6 59.Bb8 Bc4 60.g3 Ba6 
61.f4 exf4+ 62.Bxf4 Kd7 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Borngasser, Rene"]
[Black "Barle, Janez"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[BlackElo "2260"]
[ECO "E05"]
[EventDate "1971.08.02"]
[PlyCount "31"]

1.d4 Nf6 2.Nf3 d5 3.c4 e6 4.g3 Be7 5.Bg2 O-O 6.O-O dxc4 7.Qa4 a6 8.Qxc4 b5
9.Qc2 Bb7 10.Nc3 b4 11.Na4 Nbd7 12.Be3 Be4 13.Qb3 Bd5 14.Qc2 Be4 15.Qb3 
Bd5 16.Qc2 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Haik, Aldo"]
[Black "Pinal Borges, Nelson"]
[Result "1/2-1/2"]
[ECO "A46"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.d4 Nf6 2.Nf3 e6 3.Bg5 Be7 4.Nbd2 d5 5.e3 b6 6.c3 c5 7.Bd3 Bb7 8.O-O Nbd7
9.Ne5 Nxe5 10.dxe5 Nd7 11.Bxe7 Qxe7 12.f4 O-O-O 13.a4 g5 14.a5 c4 15.Bc2 
Qc5 16.Qf3 gxf4 17.Qxf4 Qc7 18.Nf3 Rdf8 19.axb6 axb6 20.Ba4 Nc5 21.Bc2 Nd7
22.Rad1 Kb8 23.Rd2 f6 24.exf6 e5 25.Qg4 Rxf6 26.Bf5 Nc5 27.Rdf2 Rhf8 28.
Ne1 h6 29.Qh4 Qg7 30.Bc2 Rxf2 31.Rxf2 Rxf2 32.Kxf2 Qf8+ 33.Ke2 Qg7 34.Qd8+
Ka7 35.Qh4 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Ogaard, Leif"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[WhiteElo "2340"]
[BlackElo "2400"]
[ECO "E61"]
[EventDate "1971.08.02"]
[PlyCount "100"]

1.Nf3 g6 2.d4 Nf6 3.c4 Bg7 4.Nc3 d6 5.Bf4 c6 6.e3 Qa5 7.Nd2 Nh5 8.Nb3 Qf5 
9.Bd3 Qg4 10.Qxg4 Bxg4 11.Bg5 h6 12.Bh4 g5 13.f3 Bxf3 14.gxf3 gxh4 15.Rg1 
Nd7 16.Kf2 Bf6 17.Rg4 e6 18.Rag1 Ke7 19.Ne4 a5 20.Be2 a4 21.Nc1 c5 22.dxc5
dxc5 23.Nd3 b6 24.f4 Rad8 25.Rb1 h3 26.Rgg1 Bh4+ 27.Kf3 f5 28.Nc3 Nhf6 29.
Bf1 Ng4 30.Bxh3 Ndf6 31.Ke2 Rxd3 32.Bxg4 Rhd8 33.Nd5+ Nxd5 34.Kxd3 Nf6+ 
35.Ke2 fxg4 36.Rgd1 Rxd1 37.Rxd1 Ne4 38.Rg1 h5 39.Kd3 Nd6 40.e4 Bf2 41.Rg2
Bd4 42.b3 a3 43.h3 gxh3 44.Rh2 h4 45.Rxh3 Bf2 46.Ke2 Bg3 47.Kf3 e5 48.fxe5
Nf7 49.Ke3 Ng5 50.Rh1 h3 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Poutiainen, Pertti"]
[Black "Hug, Werner"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1971.08.02"]
[PlyCount "113"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Qc7 6.g3 a6 7.Bg2 Nf6 8.O-O 
Be7 9.Re1 Nxd4 10.Qxd4 d6 11.Qd3 O-O 12.Bf4 Rd8 13.Rad1 h6 14.e5 dxe5 15.
Bxe5 Rxd3 16.Bxc7 Rxd1 17.Rxd1 Bd7 18.Bd6 Bxd6 19.Rxd6 Rb8 20.Ne4 Bc6 21.
Nxf6+ gxf6 22.Bxc6 bxc6 23.b3 Rc8 24.Rd7 Rb8 25.Rc7 Rb6 26.c4 Kf8 27.c5 
Rb5 28.Rxc6 a5 29.Rc8+ Ke7 30.Rc7+ Ke8 31.c6 Rc5 32.Ra7 Rxc6 33.Rxa5 e5 
34.b4 e4 35.b5 Rc1+ 36.Kg2 Rc2 37.Kf1 Rb2 38.a4 f5 39.Ra7 Kf8 40.Ke1 Kg7 
41.Kd1 Kf6 42.Kc1 Rxf2 43.b6 e3 44.b7 Rf1+ 45.Kc2 e2 46.b8=Q e1=Q 47.Qd6+ 
Kg5 48.Qd2+ Qxd2+ 49.Kxd2 Rf2+ 50.Ke3 Rxh2 51.Rxf7 Ra2 52.Rg7+ Kf6 53.Ra7 
Kg5 54.Rg7+ Kh5 55.Kf4 Rxa4+ 56.Kxf5 Ra5+ 57.Kf4 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Rogoff, Kenneth"]
[Black "Ribli, Zoltan"]
[Result "1-0"]
[WhiteElo "2425"]
[BlackElo "2440"]
[ECO "B52"]
[EventDate "1971.08.02"]
[PlyCount "77"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nf6 6.e5 dxe5 7.Nxe5 Qc7 8.
d4 cxd4 9.Qxd4 e6 10.Qa4+ Nbd7 11.Bf4 Bd6 12.Nxd7 Qxd7 13.Qxd7+ Kxd7 14.
Rd1 Ne8 15.Be3 Kc6 16.Nd2 Bc7 17.Nf3 b6 18.c4 Nf6 19.Bd4 Rhf8 20.Rd3 Rad8 
21.Rad1 Nh5 22.Bc3 Rxd3 23.Rxd3 Nf6 24.Ne5+ Bxe5 25.Bxe5 Ne8 26.Rd8 f6 27.
Bb8 a5 28.f4 g5 29.fxg5 fxg5 30.g4 Rg8 31.Be5 Rf8 32.b3 Kb7 33.Kg2 Kc6 34.
h3 Kb7 35.Rd7+ Kc8 36.Rxh7 Nf6 37.Rc7+ Kd8 38.Ra7 Nd7 39.Bd6 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Vaganian, Rafael"]
[Black "Hausner, Ivan"]
[Result "1-0"]
[WhiteElo "2510"]
[ECO "A67"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+ Nfd7
9.Bd3 O-O 10.Nf3 Na6 11.O-O Rb8 12.Be3 Nc7 13.a4 a6 14.Bf2 Nf6 15.Bh4 Qd7 
16.Qd2 b5 17.axb5 axb5 18.Bxf6 Bxf6 19.e5 Bg7 20.Ne4 dxe5 21.d6 f5 22.Nxc5
Qc6 23.Rfc1 Na8 24.fxe5 Kh8 25.Bf1 Rd8 26.Ng5 Kg8 27.Qe3 Qd5 28.Rd1 f4 29.
Qc3 Bxe5 30.Rxd5 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Barle, Janez"]
[Black "Hug, Werner"]
[Result "0-1"]
[WhiteElo "2260"]
[ECO "B47"]
[EventDate "1971.08.02"]
[PlyCount "110"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Qc7 6.g3 a6 7.Bg2 d6 8.O-O Bd7
9.Re1 Nf6 10.Nxc6 bxc6 11.Na4 Rd8 12.c4 c5 13.Bg5 Be7 14.f4 h6 15.Bh4 Bxa4
16.Qxa4+ Nd7 17.Bxe7 Kxe7 18.Rad1 Nb8 19.Re3 Nc6 20.Ra3 Rb8 21.e5 Nd4 22.
Qxa6 dxe5 23.fxe5 Rxb2 24.Qd6+ Qxd6 25.exd6+ Kxd6 26.Ra6+ Ke5 27.Re1+ Kf6 
28.Rf1+ Kg6 29.Be4+ f5 30.Bxf5+ Nxf5 31.Rxe6+ Kg5 32.h4+ Kg4 33.Rf4+ Kxg3 
34.Rxf5 Rb1+ 35.Rf1 Rxf1+ 36.Kxf1 Kxh4 37.Rg6 Rf8+ 38.Ke2 Rf7 39.Ke3 Ra7 
40.Ke4 Kh5 41.Rg2 g5 42.Kd5 Ra5 43.Kc6 g4 44.Kb6 Ra3 45.Kxc5 g3 46.Kb4 Rf3
47.c5 Kg4 48.c6 h5 49.Rd2 Rf8 50.c7 Rc8 51.Rd7 g2 52.Rg7+ Kh3 53.a4 Rxc7 
54.Rg5 h4 55.a5 Kh2 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Borngasser, Rene"]
[Black "Haik, Aldo"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[ECO "A01"]
[EventDate "1971.08.02"]
[PlyCount "68"]

1.b3 Nf6 2.Bb2 d5 3.e3 e6 4.f4 Be7 5.Nf3 O-O 6.Be2 c5 7.O-O Nc6 8.c4 b6 9.
a3 Bb7 10.Qc2 Rc8 11.Nc3 d4 12.Nd1 Qc7 13.Nf2 Rcd8 14.Rae1 Bd6 15.Ng5 h6 
16.Nge4 Nxe4 17.Nxe4 f5 18.Nxd6 Qxd6 19.Bf3 Rf7 20.Rf2 dxe3 21.dxe3 Rfd7 
22.Bc3 Qe7 23.e4 fxe4 24.Bxe4 Nd4 25.Bxd4 Rxd4 26.Bf5 R8d6 27.Rfe2 Bc8 28.
Rxe6 Rxe6 29.Bxe6+ Bxe6 30.Qe2 Rxf4 31.Qxe6+ Qxe6 32.Rxe6 Kf8 33.Rc6 Rd4 
34.Rc7 Rd3 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Hausner, Ivan"]
[Black "Poutiainen, Pertti"]
[Result "1-0"]
[ECO "B06"]
[EventDate "1971.08.02"]
[PlyCount "45"]

1.e4 g6 2.d4 Bg7 3.h4 h5 4.Nc3 c6 5.Bc4 d6 6.Bb3 Nd7 7.Bg5 Qc7 8.a4 a5 9.
Qd2 e5 10.dxe5 dxe5 11.O-O-O Ngf6 12.Nf3 O-O 13.Bxf6 Nxf6 14.Ng5 b6 15.Qd6
Qxd6 16.Rxd6 Bb7 17.f3 Rac8 18.Rhd1 Rc7 19.Kb1 Kh8 20.Rd8 Kg8 21.Bxf7+ 
Rxf7 22.Nxf7 Kxf7 23.R8d7+ 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Pinal Borges, Nelson"]
[Black "Rogoff, Kenneth"]
[Result "0-1"]
[BlackElo "2425"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 a6 5.c4 Nc6 6.Qd2 Nf6 7.Nc3 g6 8.b3 Bg7 
9.Bb2 O-O 10.Be2 Rb8 11.a3 Bg4 12.Rb1 b5 13.cxb5 axb5 14.b4 Qd7 15.O-O 
Rfc8 16.Rfd1 Bxf3 17.Bxf3 Ne5 18.Be2 Qb7 19.f3 Nc4 20.Bxc4 Rxc4 21.Rbc1 
Rbc8 22.Nb1 Qa7+ 23.Kh1 h5 24.Rxc4 Rxc4 25.Nc3 Qb7 26.h4 Qa6 27.Rc1 Qc6 
28.Ne2 Kh7 29.Nd4 Nxe4 30.Rxc4 Ng3+ 31.Kh2 Nf1+ 32.Kg1 Qxc4 33.Ne2 Nxd2 
0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Ribli, Zoltan"]
[Black "Ogaard, Leif"]
[Result "1-0"]
[WhiteElo "2440"]
[BlackElo "2340"]
[ECO "B60"]
[EventDate "1971.08.02"]
[PlyCount "87"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 Bd7 7.Bxf6 gxf6 8.
Nf5 Qa5 9.Bb5 a6 10.Bxc6 Bxc6 11.Qh5 Qe5 12.O-O-O e6 13.Rhe1 O-O-O 14.Ng3 
Qg5+ 15.Kb1 Qg6 16.f4 Bh6 17.Qf3 f5 18.Qf2 fxe4 19.Ngxe4 d5 20.Nc5 Bg7 21.
g3 Qf5 22.Nb3 Kb8 23.Nd4 Bxd4 24.Qxd4 f6 25.Re3 Rhe8 26.Rde1 h5 27.a4 Bd7 
28.Qb6 Bc8 29.Ne2 e5 30.Nd4 Qd7 31.fxe5 fxe5 32.Rxe5 Rxe5 33.Rxe5 Rh8 34.
Re7 Rh6 35.Rxd7 Rxb6 36.Rxd5 Rh6 37.a5 h4 38.Nf5 Bxf5 39.Rxf5 Rg6 40.gxh4 
Rg2 41.h5 Rxh2 42.b3 Kc7 43.Kb2 Rh3 44.b4 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Torre, Eugenio"]
[Black "Vaganian, Rafael"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[BlackElo "2510"]
[ECO "C01"]
[EventDate "1971.08.02"]
[PlyCount "20"]

1.e4 e6 2.d4 d5 3.exd5 exd5 4.Bd3 Bd6 5.Qf3 Nc6 6.c3 Be6 7.Ne2 Qd7 8.Bf4 
Nf6 9.Nd2 O-O 10.h3 Bxf4 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Haik, Aldo"]
[Black "Barle, Janez"]
[Result "0-1"]
[BlackElo "2260"]
[ECO "D31"]
[EventDate "1971.08.02"]
[PlyCount "104"]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.e4 b5 6.a4 Bb4 7.Bd2 a5 8.axb5 Bxc3 
9.bxc3 cxb5 10.Rb1 Bd7 11.Qc2 Nf6 12.e5 Nd5 13.Ng5 f5 14.exf6 Nxf6 15.Bf4 
O-O 16.Bd6 Re8 17.Be2 h6 18.h4 Bc6 19.Be5 hxg5 20.hxg5 Be4 21.Qd2 Nd5 22.
g6 Bxg6 23.Rxb5 Nd7 24.Rh8+ Kf7 25.Rxe8 Qxe8 26.Bxc4 Nxe5 27.dxe5 Nc7 28.
Rc5 Qe7 29.Rc6 a4 30.Qd1 Kg8 31.Qd6 Qxd6 32.exd6 Nd5 33.d7 Ne7 34.Rxe6 Kf8
35.Ra6 Rd8 36.Rxa4 Bf5 37.Bb5 Nd5 38.Bc6 Bxd7 39.Bxd7 Rxd7 40.c4 Nc3 41.
Ra8+ Ke7 42.f3 Rc7 43.Kd2 Rxc4 44.Ra7+ Kf6 45.Kd3 Ra4 46.Rb7 Nd5 47.Rb2 
Ra2 48.Rxa2 Nb4+ 49.Ke4 Nxa2 50.g4 Kg5 51.Ke5 Nc3 52.Kd4 Kf4 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Hug, Werner"]
[Black "Hausner, Ivan"]
[Result "1-0"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "139"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Bd7 5.c4 Nc6 6.Qd2 g6 7.Nc3 Bg7 8.b3 Qa5
9.Bb2 Nf6 10.Rb1 O-O 11.Be2 Rfc8 12.O-O a6 13.Rfe1 Bg4 14.Nd5 Qxd2 15.Nxd2
Bxe2 16.Rxe2 Nd7 17.Bxg7 Kxg7 18.Nf3 b5 19.Rc2 b4 20.Ne1 a5 21.Nd3 e6 22.
N5f4 a4 23.Rd2 axb3 24.axb3 Nc5 25.f3 Ra3 26.Nc1 Rca8 27.Nfe2 Ra1 28.Rxa1 
Rxa1 29.Kf2 Na5 30.Rxd6 Naxb3 31.Nxb3 Nxb3 32.Rb6 Ra4 33.Rb5 Kf6 34.Ke3 
Na5 35.e5+ Ke7 36.c5 Kd7 37.Nd4 b3 38.Nxb3 Nxb3 39.Rxb3 Kc7 40.g3 Ra5 41.
Rc3 Kc6 42.Kd4 Ra4+ 43.Rc4 Ra2 44.h4 h5 45.Ke4 Rd2 46.Rd4 Rc2 47.Rd6+ Kc7 
48.Ra6 Rc4+ 49.Ke3 Rxc5 50.Ra7+ Kd8 51.Rxf7 Rxe5+ 52.Kf4 Ke8 53.Rf6 Re1 
54.Rxg6 e5+ 55.Kg5 Rf1 56.Kxh5 Rxf3 57.Kg4 Re3 58.Kf5 Kf7 59.h5 Re1 60.Ra6
e4 61.h6 e3 62.Ra7+ Kf8 63.Kg6 Rg1 64.Rf7+ Ke8 65.Rf3 e2 66.h7 e1=Q 67.
h8=Q+ Kd7 68.Qd4+ Kc6 69.Rc3+ Kb5 70.Qc5+ 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Ogaard, Leif"]
[Black "Pinal Borges, Nelson"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[ECO "D34"]
[EventDate "1971.08.02"]
[PlyCount "52"]

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Be7 7.Bg2 Nf6 8.O-O 
O-O 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 12.Nxc6 bxc6 13.Rc1 Bg4 14.Re1 Qd7 
15.Na4 Bh3 16.Bh1 Ng4 17.Bc5 Qf5 18.Qc2 Qf6 19.e4 d4 20.Bxe7 Rxe7 21.Nc5 
g5 22.Nd3 Rc8 23.Qd2 Ne5 24.Nxe5 Qxe5 25.b4 c5 26.bxc5 Rxc5 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Poutiainen, Pertti"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "B09"]
[EventDate "1971.08.02"]
[PlyCount "50"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be2 Na6 7.O-O c5 8.e5 Ne8 
9.d5 Nac7 10.Be3 b6 11.Qd2 a6 12.Rad1 Bb7 13.a4 Qd7 14.Bc4 b5 15.axb5 axb5
16.e6 fxe6 17.dxe6 Qc6 18.Be2 b4 19.Nb1 Nf6 20.c3 Ng4 21.Ne1 Nxe3 22.Qxe3 
Nd5 23.Rxd5 Qxd5 24.Bf3 Qb3 25.Bxb7 Bd4 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Rogoff, Kenneth"]
[Black "Borngasser, Rene"]
[Result "1-0"]
[WhiteElo "2425"]
[BlackElo "2340"]
[ECO "C03"]
[EventDate "1971.08.02"]
[PlyCount "101"]

1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 g6 5.c3 Bg7 6.Bd3 Nf6 7.O-O O-O 8.e5 Nd7 
9.Qe2 f6 10.exf6 Qxf6 11.Bb5 e5 12.Bxc6 bxc6 13.Nxe5 Nxe5 14.dxe5 Qxe5 15.
Qxe5 Bxe5 16.Nb3 a5 17.Re1 a4 18.Nd4 Bxd4 19.cxd4 Ba6 20.Bd2 Rfe8 21.f3 
Bc4 22.a3 Rxe1+ 23.Rxe1 Kf7 24.Kf2 Re8 25.Ba5 Rxe1 26.Kxe1 Ke6 27.Bxc7 h5 
28.g4 Kf6 29.Kf2 hxg4 30.fxg4 Bb3 31.Bd8+ Ke6 32.Ke3 Bc4 33.Kf4 Be2 34.Kg5
Kf7 35.h4 Bd1 36.h5 gxh5 37.Kxh5 Bc2 38.Kg5 Bd1 39.Ba5 Bb3 40.Bd2 Bc2 41.
Bc1 Bd1 42.Kf5 Bc2+ 43.Ke5 Bd3 44.g5 Bc4 45.Kd6 Bb3 46.Kxc6 Ke6 47.Kc7 Ke7
48.Bd2 Kf7 49.Kd6 Kg7 50.Ke7 Kg8 51.Kf6 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Vaganian, Rafael"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[WhiteElo "2510"]
[BlackElo "2440"]
[ECO "E63"]
[EventDate "1971.08.02"]
[PlyCount "114"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nc6 7.O-O a6 8.h3 Rb8 
9.e4 b5 10.cxb5 axb5 11.Re1 Nd7 12.Be3 Na5 13.b3 c5 14.Rc1 Nc6 15.dxc5 
Nxc5 16.e5 Nxe5 17.Nxe5 Bxe5 18.Bxc5 Bxc3 19.Rxc3 dxc5 20.Rxc5 Qxd1 21.
Rxd1 Be6 22.Kf1 Rfc8 23.Rdc1 Bc4+ 24.R5xc4 bxc4 25.bxc4 Rc5 26.a4 Rb4 27.
a5 Rbxc4 28.Rxc4 Rxc4 29.a6 Ra4 30.Bb7 Ra2 31.Kg2 Ra3 32.h4 Kf8 33.g4 Ke8 
34.f3 Kd7 35.Kg3 Kc7 36.Kf4 h6 37.Ke4 Kb6 38.Bd5 Ra4+ 39.Ke5 Ra5 40.Kd4 f5
41.gxf5 gxf5 42.Bb7 e5+ 43.Ke3 Ra4 44.Bc8 Rxh4 45.Bxf5 Kxa6 46.Bg4 h5 47.
Bd7 Rf4 48.Kf2 Kb6 49.Be8 h4 50.Bd7 Kc7 51.Be6 Kd6 52.Bc8 Ke7 53.Kg2 Kf6 
54.Bb7 Kg5 55.Kh3 Rf8 56.Bc6 Kf4 57.Bb7 Ke3 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Barle, Janez"]
[Black "Hausner, Ivan"]
[Result "1/2-1/2"]
[WhiteElo "2260"]
[ECO "B77"]
[EventDate "1971.08.02"]
[PlyCount "135"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 8.Qd2 
O-O 9.Bc4 Qa5 10.h4 Nxd4 11.Bxd4 Qb4 12.Qd3 d5 13.Bb3 dxe4 14.fxe4 Bg4 15.
a3 Qa5 16.e5 Bf5 17.Qf3 Ng4 18.O-O-O Nxe5 19.Qxb7 Bg4 20.Nd5 e6 21.Bc3 Qc5
22.Bb4 Qf2 23.Bxf8 Rxf8 24.Rdf1 Nd3+ 25.Kb1 Qd4 26.c3 Qc5 27.Nf6+ Bxf6 28.
Rxf6 Nf2 29.Rf1 Bf5+ 30.Bc2 Ng4 31.R6xf5 exf5 32.Bb3 Ne3 33.Re1 h5 34.Qa6 
Kg7 35.Qb7 f4 36.Qf3 Qf5+ 37.Ka2 Rb8 38.Qc6 Qb5 39.Qxb5 Rxb5 40.Re2 Re5 
41.Rf2 Rf5 42.Ba4 Kf8 43.Bd7 Rf6 44.b4 Ke7 45.Ba4 Kd6 46.Bb3 Ke5 47.c4 g5 
48.hxg5 Rf5 49.b5 Rxg5 50.c5 Rxg2 51.Rxg2 Nxg2 52.b6 axb6 53.cxb6 Kd6 54.
Bd5 Ne1 55.a4 f3 56.a5 f2 57.Bc4 Kc6 58.Bf1 Nc2 59.Bg2+ Kd7 60.a6 Nb4+ 61.
Kb3 Nxa6 62.Kc4 Kd6 63.Kd3 f1=Q+ 64.Bxf1 Nc5+ 65.Ke3 Kc6 66.Kf4 Kxb6 67.
Kg5 Kc6 68.Kf6 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Borngasser, Rene"]
[Black "Ogaard, Leif"]
[Result "1-0"]
[WhiteElo "2340"]
[BlackElo "2340"]
[ECO "B44"]
[EventDate "1971.08.02"]
[PlyCount "117"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nb5 d6 6.Bf4 e5 7.Be3 Nf6 8.Bg5 
Be6 9.N1c3 a6 10.Bxf6 gxf6 11.Na3 Qb6 12.Nc4 Qd4 13.Ne3 Bh6 14.Qf3 O-O-O 
15.Bd3 Bxe3 16.fxe3 Qc5 17.O-O-O Rhg8 18.Rd2 Kb8 19.Nd5 Nb4 20.Nxb4 Qxb4 
21.a3 Qc5 22.Qxf6 Qxe3 23.Qh4 Rc8 24.Re1 Qg5 25.Qf2 Rc6 26.Kb1 Rgc8 27.c3 
Qd8 28.Ka1 Qa5 29.Rc1 Qa4 30.Bb1 b5 31.Rcd1 Bb3 32.Re1 a5 33.Qf6 Be6 34.
Red1 b4 35.Rxd6 Rxd6 36.Rxd6 bxa3 37.Rb6+ Ka8 38.b3 Qd7 39.Qxe5 Qa7 40.Rb5
Rc6 41.Rxa5 Ra6 42.Qh8+ Kb7 43.Rb5+ Rb6 44.Qe5 Qa6 45.Bd3 Rxb5 46.Bxb5 Qb6
47.Ka2 Qf2+ 48.Kxa3 Qxg2 49.Kb4 Qc2 50.Ba4 Qg2 51.Qb5+ Kc7 52.Qc6+ Kd8 53.
Qd6+ Kc8 54.Bc6 Qc2 55.c4 Qe2 56.e5 Qe1+ 57.Kb5 Qh4 58.Kb6 Qf2+ 59.c5 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Haik, Aldo"]
[Black "Rogoff, Kenneth"]
[Result "0-1"]
[BlackElo "2425"]
[ECO "D91"]
[EventDate "1971.08.02"]
[PlyCount "86"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 dxc4 6.e4 O-O 7.Bxc4 Bg4 8.Qd2 
Bxf3 9.gxf3 Nfd7 10.Rd1 Nc6 11.Ne2 Qc8 12.Bb3 e5 13.d5 Nd4 14.Nxd4 exd4 
15.h4 Ne5 16.Qf4 Qd7 17.Bf6 Qd6 18.Qxe5 Bxf6 19.Qxd6 cxd6 20.Kd2 Rfc8 21.
Kd3 a5 22.a4 Rc5 23.Bc4 Rac8 24.Rc1 Kg7 25.h5 g5 26.Rc2 Be5 27.Rb1 R8c7 
28.Bb3 Kh6 29.Rxc5 Rxc5 30.Rh1 b5 31.Bc2 bxa4 32.Bxa4 Rc8 33.Bc6 Rb8 34.
Kc2 d3+ 35.Kxd3 Rxb2 36.Ra1 Rb3+ 37.Kc2 Rxf3 38.Rxa5 Rxf2+ 39.Kd3 Kxh5 40.
Ra7 g4 41.Be8 Kg6 42.Rb7 Bh2 43.Kc3 g3 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Pinal Borges, Nelson"]
[Black "Vaganian, Rafael"]
[Result "1-0"]
[BlackElo "2510"]
[ECO "B62"]
[EventDate "1971.08.02"]
[PlyCount "109"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nb3 Be7 8.f4 a6
9.Qf3 Qc7 10.O-O-O Bd7 11.Bd3 O-O-O 12.Rhe1 h6 13.Bh4 g5 14.fxg5 Ne5 15.
Qf1 Nh5 16.Bf2 Bxg5+ 17.Kb1 Rdg8 18.Bxa6 Be7 19.Bb5 Nf6 20.Bxd7+ Nfxd7 21.
Nb5 Qc4 22.Nxd6+ Bxd6 23.Rxd6 Qxf1 24.Rxf1 Rxg2 25.Bg3 Re2 26.Rfd1 Rxe4 
27.Rxd7 Nxd7 28.Rxd7 Kxd7 29.Nc5+ Kc6 30.Nxe4 f5 31.Nf2 Kd5 32.Nd3 Ke4 33.
a4 h5 34.Kc1 h4 35.Be5 Rg8 36.b4 h3 37.a5 Rd8 38.Bg3 Rg8 39.Be5 Rd8 40.b5 
Rd5 41.a6 Rxb5 42.a7 Ra5 43.Bb8 b6 44.Nb4 f4 45.Kd2 Ra4 46.Nd3 f3 47.Nf2+ 
Kd5 48.Nxh3 e5 49.Nf2 e4 50.Nd1 Kc6 51.Nc3 Rd4+ 52.Ke3 Kb7 53.Nb5 Rd1 54.
Nc7 Re1+ 55.Kf2 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Ribli, Zoltan"]
[Black "Poutiainen, Pertti"]
[Result "1-0"]
[WhiteElo "2440"]
[ECO "E62"]
[EventDate "1971.08.02"]
[PlyCount "60"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.c4 d6 6.d4 Nc6 7.Nc3 Bg4 8.d5 Na5 
9.Nd2 c6 10.h3 Bd7 11.Qc2 a6 12.b3 b5 13.Bb2 Rb8 14.Rad1 bxc4 15.bxc4 e5 
16.e3 Ne8 17.Ne2 f5 18.Bc3 Qc7 19.Rb1 Nf6 20.Rb2 Ra8 21.Rfb1 Bc8 22.Rb6 
Nb7 23.Rxc6 Qe7 24.Rbb6 a5 25.Ra6 Bd7 26.Qb2 Bxc6 27.Rxa8 Rxa8 28.dxc6 e4 
29.cxb7 Rb8 30.Nb3 Qxb7 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Torre, Eugenio"]
[Black "Hug, Werner"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[ECO "B44"]
[EventDate "1971.08.02"]
[PlyCount "96"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.Bf4 e5 7.Be3 Nf6 8.Bg5 
Qa5+ 9.Qd2 Nxe4 10.Qxa5 Nxa5 11.Be3 Kd7 12.N1c3 Nxc3 13.Nxc3 b6 14.O-O-O 
Bb7 15.f4 f6 16.fxe5 fxe5 17.Rd2 Be7 18.Be2 h5 19.Nd5 Bxd5 20.Rxd5 Nc6 21.
c3 Kc7 22.a4 Bf6 23.Rhd1 Rad8 24.Bf3 e4 25.Be2 Be5 26.h3 g6 27.Kc2 Ne7 28.
Rb5 Nc6 29.Bc4 Rhf8 30.Bh6 Rf2+ 31.Rd2 Rxd2+ 32.Kxd2 Bf6 33.Be3 Ne7 34.a5 
Rb8 35.axb6+ axb6 36.Bf7 Kc6 37.Rb4 d5 38.Be8+ Rxe8 39.Rxb6+ Kd7 40.Rxf6 
Rb8 41.b4 Ra8 42.Bc5 Nf5 43.Rxg6 Ra2+ 44.Ke1 Ra1+ 45.Kd2 Ra2+ 46.Kd1 e3 
47.g3 Ra1+ 48.Ke2 Ra2+ 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Hausner, Ivan"]
[Black "Torre, Eugenio"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[ECO "B05"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.exd6 
cxd6 9.h3 Bh5 10.Nc3 O-O 11.b3 d5 12.c5 Bxf3 13.Bxf3 Nc8 14.Bf4 Nc6 15.b4 
Bf6 16.Ne2 a6 17.Rb1 Re8 18.a4 N8e7 19.b5 Na5 20.Rb4 axb5 21.axb5 Qd7 22.
Qc2 Nc4 23.Qc3 Rec8 24.Qd3 Ra3 25.Rb3 Rxb3 26.Qxb3 Nf5 27.Rd1 Ra8 28.Bg4 
Ne7 29.Ng3 g6 30.Ne4 Bg7 31.Nd6 h5 32.Bf3 Nxd6 33.Bxd6 Nf5 34.Be5 Bxe5 35.
dxe5 Qc7 36.Qc3 Ra4 37.Be2 Re4 38.b6 Qc6 39.Bd3 Rf4 40.Bxf5 exf5 41.e6 Re4
42.exf7+ Kxf7 43.Qh8 Re8 44.Qd4 Rd8 45.f4 Qf6 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Hug, Werner"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]
[BlackElo "2440"]
[ECO "A04"]
[EventDate "1971.08.02"]
[PlyCount "81"]

1.e4 c5 2.Nf3 e6 3.d3 Nc6 4.g3 g6 5.Bg2 Bg7 6.O-O Nge7 7.c3 d5 8.Re1 O-O 
9.e5 b5 10.Bf4 b4 11.Nbd2 Rb8 12.h4 bxc3 13.bxc3 Ba6 14.Nb3 Bxd3 15.Nxc5 
Bc4 16.Qd2 Rb5 17.Nd3 d4 18.Nb2 Bd5 19.c4 Bxf3 20.cxb5 Bxg2 21.Kxg2 Qd5+ 
22.Kh2 Qxb5 23.Nd3 Nd5 24.Rab1 Qc4 25.Rb3 Nc3 26.Rc1 Rd8 27.Bg5 Rd5 28.
Rbxc3 dxc3 29.Rxc3 Qa6 30.Qc1 h6 31.Rxc6 Qxd3 32.Bxh6 Bxe5 33.Rc8+ Kh7 34.
Qe3 Qf5 35.Bf8 Qh5 36.Kg2 a5 37.a3 Bf6 38.Rc7 Kg8 39.Rc8 Kh7 40.Rc7 Kg8 
41.Rc8 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Ogaard, Leif"]
[Black "Haik, Aldo"]
[Result "1-0"]
[WhiteElo "2340"]
[ECO "E97"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.e4 d6 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 
9.Nd2 c5 10.f4 exf4 11.Nf3 h6 12.Bxf4 Nh5 13.Be3 Bg4 14.Qd2 Kh7 15.e5 Nf5 
16.Bf2 dxe5 17.Bxc5 Re8 18.Ng5+ hxg5 19.Bxg4 Nf4 20.g3 Ne6 21.Rxf5 gxf5 
22.Bxf5+ Kg8 23.Be3 Nd4 24.Rf1 Qc7 25.b3 Qa5 26.Kg2 Rad8 27.Bxg5 Rd6 28.
Be4 f6 29.Be3 Rf8 30.g4 a6 31.Qd3 Kh8 32.Bd2 f5 33.gxf5 Bh6 34.Bxh6 Rxh6 
35.Kh1 Qd8 36.Qg3 Qf6 37.Rg1 Rh4 38.c5 Qh6 39.Qxe5+ Qf6 40.Qxf6+ Rxf6 41.
Rg5 Ne2 42.Nxe2 Rxe4 43.Nc3 Re3 44.Rg3 Re1+ 45.Kg2 Rxf5 46.Rd3 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Poutiainen, Pertti"]
[Black "Pinal Borges, Nelson"]
[Result "0-1"]
[ECO "C68"]
[EventDate "1971.08.02"]
[PlyCount "38"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5 7.d4 Bxf3 8.Qxf3 
Qxd4 9.Rd1 Qc4 10.Nc3 Bd6 11.b3 Qe6 12.Be3 O-O-O 13.a4 Ne7 14.Rdb1 a5 15.
Na2 Rdg8 16.Bd2 g5 17.Qd3 Ng6 18.Kh1 g4 19.Rg1 Bc5 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Rogoff, Kenneth"]
[Black "Barle, Janez"]
[Result "1-0"]
[WhiteElo "2425"]
[BlackElo "2260"]
[ECO "A04"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.e4 c5 2.Nf3 e6 3.d3 Nc6 4.g3 g6 5.Bg2 Bg7 6.O-O Nge7 7.Re1 d6 8.c3 O-O 
9.Nbd2 b5 10.Nb3 e5 11.Nbd2 f5 12.Qb3+ c4 13.dxc4 Na5 14.Qxb5 Bd7 15.Qb4 
Bc6 16.Ng5 Rf6 17.Nb3 Nb7 18.c5 d5 19.exd5 Nxd5 20.Qc4 e4 21.Nd4 Qd7 22.b4
a6 23.Nxc6 Qxc6 24.Bf4 Nd6 25.Bxd6 Rxd6 26.Rad1 Rd7 27.Nxe4 fxe4 28.Bxe4 
Rad8 29.Rxd5 Rxd5 30.Rd1 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Vaganian, Rafael"]
[Black "Borngasser, Rene"]
[Result "1-0"]
[WhiteElo "2510"]
[BlackElo "2340"]
[ECO "A89"]
[EventDate "1971.08.02"]
[PlyCount "79"]

1.d4 f5 2.Nf3 Nf6 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.c4 d6 7.Nc3 Nc6 8.d5 Ne5 
9.Nd2 c5 10.h3 Bd7 11.Rb1 Ne8 12.f4 Nf7 13.Qc2 Nc7 14.e4 e5 15.dxe6 Nxe6 
16.Qd3 Nd4 17.Nb3 fxe4 18.Nxe4 d5 19.cxd5 Bb5 20.Qd1 Be2 21.Qe1 Bxf1 22.
Qxf1 Nxb3 23.axb3 Bd4+ 24.Kh2 Kh8 25.b4 cxb4 26.Qd3 Qb6 27.Bd2 Rfd8 28.Rd1
a5 29.Be1 Rxd5 30.Bf2 Rad8 31.Qc4 Bxf2 32.Rxd5 Rxd5 33.Qxd5 Kg7 34.b3 Bg1+
35.Kh1 Qd4 36.Qxb7 Qd1 37.h4 Bd4+ 38.Kh2 Qxb3 39.Qd7 Bf6 40.Nc5 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Barle, Janez"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[WhiteElo "2260"]
[BlackElo "2400"]
[ECO "B02"]
[EventDate "1971.08.02"]
[PlyCount "107"]

1.e4 Nf6 2.Nc3 d5 3.exd5 Nxd5 4.Bc4 e6 5.d4 Nxc3 6.bxc3 Be7 7.Nf3 O-O 8.
O-O b6 9.Qe2 Bb7 10.Re1 Nd7 11.Bd3 c5 12.Bf4 Nf6 13.Rad1 Qc8 14.Ne5 Nd5 
15.Qh5 f5 16.Bd2 Bf6 17.c4 Ne7 18.c3 Nc6 19.Nxc6 Qxc6 20.d5 exd5 21.Qxf5 
g6 22.Qg4 Qc8 23.Qg3 Qd8 24.Bh6 Rf7 25.Re6 Bc8 26.Rd6 Qe7 27.cxd5 Bg4 28.
Qxg4 Qxd6 29.Bxg6 Re7 30.Bf5+ Kh8 31.Be6 Bxc3 32.Rd3 Qe5 33.Re3 Qd4 34.Re4
Qd3 35.h3 Bg7 36.Bg5 Ree8 37.Re3 Qb1+ 38.Kh2 Qb2 39.Re2 Qd4 40.Qxd4 cxd4 
41.d6 d3 42.Re1 h6 43.Bd2 Rad8 44.d7 Re7 45.Bb4 Rdxd7 46.Bxd7 Rxd7 47.Bd2 
Rc7 48.Kg3 h5 49.Re6 Kh7 50.Kf3 Rf7+ 51.Ke3 Bh6+ 52.Kxd3 Rd7+ 53.Kc3 Bxd2+
54.Kc2 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Borngasser, Rene"]
[Black "Poutiainen, Pertti"]
[Result "1-0"]
[WhiteElo "2340"]
[ECO "A48"]
[EventDate "1971.08.02"]
[PlyCount "85"]

1.d4 Nf6 2.Nf3 g6 3.Nbd2 Bg7 4.e4 O-O 5.Bd3 d6 6.O-O Nc6 7.Re1 e5 8.d5 Ne7
9.c4 Nh5 10.b4 f5 11.Bb2 Nf4 12.Bf1 fxe4 13.Nxe4 Bg4 14.Ned2 Qd7 15.h3 
Bxf3 16.Nxf3 Qf5 17.Re3 Bh6 18.Rb3 Rf7 19.Qe1 Raf8 20.Nd2 b5 21.Ne4 bxc4 
22.Bxc4 Kh8 23.Rd1 g5 24.f3 Neg6 25.Bf1 Ne7 26.b5 Rg7 27.Ng3 Qc8 28.Qe4 
Qb7 29.Kh2 Qb6 30.Bc1 Rgf7 31.Be3 Qb7 32.Ra3 Nc8 33.Qc4 Nb6 34.Qc6 Rb8 35.
Ne4 Nbxd5 36.Qxb7 Rxb7 37.Bxa7 Nf6 38.Be3 Rf8 39.Nxf6 Rxf6 40.Ra8+ Bf8 41.
a4 Kg7 42.a5 c5 43.a6 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Haik, Aldo"]
[Black "Vaganian, Rafael"]
[Result "0-1"]
[BlackElo "2510"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "98"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Bg4 5.Nc3 Nc6 6.Bb5 Bxf3 7.gxf3 Nf6 8.
Bg5 Nd7 9.Qd2 a6 10.Bxc6 bxc6 11.f4 Rb8 12.Nd1 h6 13.Bh4 g5 14.fxg5 Ne5 
15.Qc3 hxg5 16.Bxg5 Qd7 17.Bf4 Rh4 18.Bxe5 Rxe4+ 19.Ne3 Rxe5 20.Rg1 Qb7 
21.O-O-O f6 22.b3 Bh6 23.Qc4 Kd7 24.Rg3 Qb4 25.Qxb4 Rxb4 26.c3 Rf4 27.Kb1 
Rh5 28.Ng4 Bg7 29.Ne3 Bh8 30.Rg2 Rfh4 31.Rh1 f5 32.Kc2 Rh3 33.Rf1 f4 34.
Nd1 Rxh2 35.Rg8 Re5 36.Ra8 Re2+ 37.Kb1 Rh3 38.Rxa6 Bxc3 39.Ra7+ Ke6 40.
Nxc3 Rxc3 41.Ra4 Rf3 42.Rc4 Rfxf2 43.Rxf2 Rxf2 44.Rxc6 Rg2 45.Rc1 Kf5 46.
a4 e5 47.a5 f3 48.Rf1 e4 49.a6 Kf4 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Pinal Borges, Nelson"]
[Black "Hug, Werner"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1971.08.02"]
[PlyCount "40"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.g3 a6 7.Bg2 d6 8.O-O Bd7
9.Re1 Nf6 10.Nxc6 bxc6 11.Na4 Rd8 12.c4 c5 13.Bf4 Bc6 14.Nc3 Be7 15.Qe2 
Qb7 16.Nd5 e5 17.Nxe7 Qxe7 18.Bd2 O-O 19.Rad1 Ne8 20.b3 Nc7 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Ribli, Zoltan"]
[Black "Hausner, Ivan"]
[Result "1-0"]
[WhiteElo "2440"]
[ECO "A39"]
[EventDate "1971.08.02"]
[PlyCount "67"]

1.c4 c5 2.Nf3 Nc6 3.Nc3 Nf6 4.g3 g6 5.Bg2 Bg7 6.O-O O-O 7.d4 cxd4 8.Nxd4 
Nxd4 9.Qxd4 d6 10.Qd3 Nd7 11.b3 Nc5 12.Qd2 Bf5 13.Bb2 Qd7 14.Rfe1 a5 15.
Rad1 Be6 16.h4 a4 17.b4 a3 18.Ba1 Na4 19.Nd5 Nb2 20.Nb6 Qd8 21.Nxa8 Nxd1 
22.Bxg7 Kxg7 23.Bxb7 Qb8 24.Bg2 Nb2 25.c5 Nc4 26.Qc3+ Kg8 27.Nb6 Nxb6 28.
cxb6 Bxa2 29.Qxa3 Bc4 30.Qa7 d5 31.Ra1 Qd6 32.b7 Kg7 33.Qd4+ e5 34.Qc5 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Rogoff, Kenneth"]
[Black "Ogaard, Leif"]
[Result "1/2-1/2"]
[WhiteElo "2425"]
[BlackElo "2340"]
[ECO "B04"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 c6 6.exd6 Qxd6 7.O-O Bg7 8.Nbd2 
O-O 9.Ne4 Qc7 10.h3 h6 11.Re1 Nd7 12.c3 b5 13.Bb3 Bb7 14.Ng3 Rfe8 15.Qd3 
a6 16.a4 bxa4 17.Bxa4 e5 18.dxe5 Nxe5 19.Nxe5 Rxe5 20.Rxe5 Qxe5 21.Bd2 c5 
22.Bb3 Ne7 23.Re1 Qc7 24.Qe2 Nd5 25.Ne4 Rd8 26.Bc1 Kh7 27.Rd1 f5 28.Ng3 
Nf4 29.Bxf4 Rxd1+ 30.Qxd1 Qxf4 31.Qd8 c4 32.Bc2 h5 33.h4 Qc1+ 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Hausner, Ivan"]
[Black "Pinal Borges, Nelson"]
[Result "1-0"]
[ECO "C55"]
[EventDate "1971.08.02"]
[PlyCount "121"]

1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3 Nc6 5.e5 d5 6.Bb5 Nd7 7.O-O Be7 8.Bf4 
Nc5 9.Nxd4 Bd7 10.Bxc6 bxc6 11.Nc3 Ne6 12.Bg3 Nxd4 13.Qxd4 O-O 14.b3 Bf5 
15.Rac1 Ba3 16.Rcd1 Qe7 17.Qa4 Bd7 18.Qf4 Qb4 19.Na4 Qxf4 20.Bxf4 Rfe8 21.
Rfe1 Be6 22.c3 a5 23.Be3 Rab8 24.Bc5 Bxc5 25.Nxc5 Rb5 26.Na6 Rb7 27.Nc5 
Rb5 28.Na6 Rb7 29.Rb1 Ra8 30.Nc5 Rb5 31.Nd3 Bf5 32.Rbd1 Bxd3 33.Rxd3 a4 
34.b4 Rd8 35.Red1 Kf8 36.a3 Re8 37.f4 f6 38.exf6 gxf6 39.Kf2 Re4 40.Rd4 
Rxd4 41.cxd4 Ke7 42.Re1+ Kd7 43.Re3 Rb8 44.f5 Rg8 45.h3 Rg5 46.g4 h5 47.
Kf3 hxg4+ 48.hxg4 Rg7 49.Re6 Rf7 50.Kf4 Rf8 51.Kg3 Rf7 52.Re2 Rh7 53.Rh2 
Re7 54.Kf3 Re4 55.Rh7+ Ke8 56.Rxc7 Rxd4 57.Rxc6 Kf7 58.b5 Rd3+ 59.Kf4 Rxa3
60.b6 Rb3 61.Rc7+ 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Hug, Werner"]
[Black "Borngasser, Rene"]
[Result "1-0"]
[BlackElo "2340"]
[ECO "A80"]
[EventDate "1971.08.02"]
[PlyCount "93"]

1.d4 f5 2.Bg5 g6 3.Nc3 Bg7 4.e4 fxe4 5.Nxe4 d5 6.Ng3 Nf6 7.Nf3 O-O 8.Be2 
Nc6 9.Ne5 Qd6 10.Nxc6 bxc6 11.O-O c5 12.c3 cxd4 13.cxd4 Rb8 14.Qd2 Qb4 15.
b3 Qxd2 16.Bxd2 Ne8 17.Be3 Rb4 18.Rad1 c6 19.Rd2 Bd7 20.Bf3 Nd6 21.Rc1 a5 
22.Bd1 a4 23.a3 Rb7 24.b4 Nc4 25.Rd3 e5 26.Ra1 Nb2 27.Rd2 Nc4 28.Rd3 h5 
29.Ra2 Re8 30.h4 e4 31.Rc3 c5 32.Rxc4 dxc4 33.dxc5 c3 34.Bc2 Bc6 35.Ra1 
Rd7 36.Rc1 Bd4 37.Ne2 Be5 38.Kf1 Bf6 39.g3 Bb5 40.Ke1 Kf7 41.Bb1 Kg7 42.
Nxc3 Bxc3+ 43.Rxc3 Red8 44.Bc2 Rd5 45.c6 Rc8 46.Bxe4 Rd6 47.c7 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Ogaard, Leif"]
[Black "Barle, Janez"]
[Result "0-1"]
[WhiteElo "2340"]
[BlackElo "2260"]
[ECO "D94"]
[EventDate "1971.08.02"]
[PlyCount "96"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2 c5 7.dxc5 Na6 8.cxd5 
Nxc5 9.Bc4 a6 10.a4 Bf5 11.O-O Rc8 12.Qe2 Nfe4 13.Rfd1 Nxc3 14.Bxc3 Bxc3 
15.bxc3 Ne4 16.Rd4 Qa5 17.Qb2 Qxc3 18.Qxc3 Nxc3 19.Nd2 Rfd8 20.Ra3 e5 21.
dxe6 Rxd4 22.exf7+ Kg7 23.exd4 Nb1 24.Nxb1 Rxc4 25.Nc3 Rxd4 26.f3 Rd3 27.
Kf2 Be6 28.Nb1 Rd1 29.Nc3 Rd2+ 30.Kg3 Rd3 31.a5 Kxf7 32.Kf4 Ke7 33.h4 h6 
34.Ke5 Bc4 35.f4 Be6 36.g4 Re3+ 37.Kd4 Rf3 38.f5 gxf5 39.gxf5 Rxf5 40.Ne4 
Rh5 41.Rc3 Rxh4 42.Rc7+ Kd8 43.Rxb7 Bf5 44.Ra7 Bxe4 45.Ke3 Bd5 46.Rxa6 
Re4+ 47.Kf2 Re6 48.Ra7 Kc8 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Poutiainen, Pertti"]
[Black "Haik, Aldo"]
[Result "1-0"]
[ECO "A26"]
[EventDate "1971.08.02"]
[PlyCount "77"]

1.g3 g6 2.Bg2 Bg7 3.Nf3 Nf6 4.O-O O-O 5.d3 d6 6.c4 e5 7.Nc3 Nc6 8.Rb1 Nh5 
9.b4 f5 10.Bd2 f4 11.b5 Ne7 12.Qb3 Kh8 13.Rfc1 Bg4 14.Nd5 Nxd5 15.cxd5 Qd7
16.Rc2 Bh3 17.Rbc1 Qg4 18.Qb4 Bxg2 19.Kxg2 e4 20.dxe4 fxg3 21.hxg3 Be5 22.
Be3 Bxg3 23.fxg3 Nxg3 24.Nh2 Qh4 25.Qd4+ Kg8 26.Rxc7 Nh5 27.Bh6 Rf6 28.Qe3
Raf8 29.Bxf8 Nf4+ 30.Kh1 Nxe2 31.Qxe2 Rf2 32.Qxf2 Qxf2 33.Bxd6 Qe3 34.Rc8+
Kf7 35.R1c7+ Kf6 36.Rf8+ Kg5 37.Bf4+ Qxf4 38.Rxf4 Kxf4 39.Kg2 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Torre, Eugenio"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[WhiteElo "2400"]
[BlackElo "2440"]
[ECO "B85"]
[EventDate "1971.08.02"]
[PlyCount "108"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 a6 7.O-O Be7 8.f4 Qc7
9.a4 Nc6 10.Be3 O-O 11.Kh1 Bd7 12.Nb3 b6 13.Bf3 Rab8 14.Qe2 Na5 15.Bd4 e5 
16.fxe5 dxe5 17.Nd5 Nxd5 18.exd5 Bd6 19.Bc3 f5 20.Nxa5 bxa5 21.Qxa6 Ra8 
22.Qd3 Rae8 23.Qd2 e4 24.Qg5 Be5 25.d6 Qxd6 26.Rad1 Qc7 27.Bh5 Rd8 28.Bxe5
Qxe5 29.Be2 h6 30.Bc4+ Kh7 31.Qh4 Rc8 32.Rxd7 Rxc4 33.c3 Rxa4 34.Rfd1 Ra2 
35.h3 Rxb2 36.Re7 Qxc3 37.Rd6 Qc1+ 38.Kh2 Qg5 39.Qxg5 hxg5 40.Rdd7 Kg6 41.
Re6+ Kh7 42.Ree7 Kh6 43.Rxg7 f4 44.h4 gxh4 45.Rg4 f3 46.Rd6+ Kh5 47.Kh3 
Rxg2 48.Rd5+ Kh6 49.Rd6+ Kh7 50.Rd7+ Kh8 51.Rxh4+ Kg8 52.Rdh7 Rf6 53.Rh8+ 
Kf7 54.Rf4 Rh2+ 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Vaganian, Rafael"]
[Black "Rogoff, Kenneth"]
[Result "1-0"]
[WhiteElo "2510"]
[BlackElo "2425"]
[ECO "D87"]
[EventDate "1971.08.02"]
[PlyCount "73"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 
Nc6 9.Be3 O-O 10.O-O Qc7 11.Rc1 Rd8 12.Kh1 b6 13.f4 Na5 14.Bd3 f5 15.exf5 
Bxf5 16.Bxf5 gxf5 17.d5 Nc4 18.Qd3 b5 19.Qxf5 Qd6 20.Bg1 Qxd5 21.Ng3 Rac8 
22.Rfe1 Bf6 23.Qh3 Kh8 24.Ne4 Rc7 25.Rcd1 Qxd1 26.Rxd1 Rxd1 27.Qh6 Kg8 28.
Nxf6+ exf6 29.Qxf6 h6 30.Qe6+ Kh7 31.Qf5+ Kh8 32.h3 Rg7 33.Qxc5 a6 34.Qh5 
Ra1 35.f5 Kh7 36.f6 Rg6 37.Qf5 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Barle, Janez"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[WhiteElo "2260"]
[BlackElo "2440"]
[ECO "B57"]
[EventDate "1971.08.02"]
[PlyCount "44"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Qb6 7.Nde2 e6 8.O-O 
a6 9.Bb3 Be7 10.Kh1 O-O 11.Bg5 Qc7 12.f4 b5 13.Qd3 Bb7 14.Rf3 b4 15.e5 
dxe5 16.Bxf6 bxc3 17.Bxg7 Kxg7 18.f5 e4 19.Qxe4 cxb2 20.Raf1 Qe5 21.Qg4+ 
Kh8 22.Ng3 Na5 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Borngasser, Rene"]
[Black "Hausner, Ivan"]
[Result "1-0"]
[WhiteElo "2340"]
[ECO "B90"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Ng4 7.Bg5 Qa5 8.Qd2 
Nc6 9.Nb3 Qd8 10.O-O-O Bd7 11.Bh4 Rc8 12.f4 Nf6 13.Bd3 e6 14.g4 h6 15.Bg3 
Nxg4 16.Be2 e5 17.f5 Nf6 18.Kb1 Na5 19.Nxa5 Qxa5 20.Bf3 b5 21.Be1 Qb6 22.
Qg2 Bc6 23.Bf2 Qc7 24.Rd2 b4 25.Ne2 Qb7 26.Ng3 Be7 27.Re1 a5 28.Nh5 Nxh5 
29.Bxh5 Rg8 30.f6 Bxf6 31.Rxd6 Kf8 32.Rxf6 Bxe4 33.Qxe4 Qxe4 34.Rxf7+ Ke8 
35.Rxg7+ 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Haik, Aldo"]
[Black "Hug, Werner"]
[Result "0-1"]
[ECO "B48"]
[EventDate "1971.08.02"]
[PlyCount "52"]

1.e4 c5 2.Nc3 Nc6 3.Nge2 e6 4.d4 cxd4 5.Nxd4 Qc7 6.Be3 Nf6 7.Bd3 Nxd4 8.
Bxd4 Bc5 9.Bxf6 gxf6 10.Qg4 Bb4 11.Qg7 Bxc3+ 12.bxc3 Qxc3+ 13.Ke2 Rf8 14.
Qxh7 b6 15.h4 Bb7 16.Qh6 Ke7 17.h5 Rg8 18.Rag1 Rg5 19.f4 Ra5 20.f5 Bxe4 
21.Bxe4 Re5 22.Rh4 Rc8 23.Qd2 Qg3 24.Rf4 Rxc2 25.Qxc2 Qxf4 26.Kd1 Rxe4 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Ogaard, Leif"]
[Black "Vaganian, Rafael"]
[Result "1-0"]
[WhiteElo "2340"]
[BlackElo "2510"]
[ECO "D40"]
[EventDate "1971.08.02"]
[PlyCount "93"]

1.Nf3 Nf6 2.c4 e6 3.Nc3 c5 4.e3 d5 5.d4 Nc6 6.Bd3 a6 7.cxd5 exd5 8.O-O Bg4
9.Be2 Bd6 10.b3 O-O 11.Bb2 Re8 12.Rc1 Bxf3 13.Bxf3 cxd4 14.exd4 Bb4 15.Na4
Ne4 16.a3 Bd6 17.Nc5 Qe7 18.b4 Rad8 19.Qc2 Ng5 20.Qb3 Bxc5 21.Rxc5 Nxf3+ 
22.Qxf3 Qe2 23.Qc3 Rd6 24.a4 h5 25.b5 axb5 26.Rxb5 Re4 27.Rxb7 Rg6 28.Qh3 
Na5 29.Rb8+ Kh7 30.g3 Nc4 31.Qc8 Rf6 32.Bc1 Kg6 33.Qh8 Nd6 34.Rg8 Ne8 35.
Qh6+ Kf5 36.Qg5+ Ke6 37.Rxe8+ Kd6 38.Ba3+ Kc6 39.Rxe4 Qxe4 40.Qd2 Rf3 41.
Qc1+ Kd7 42.Qc5 Ke6 43.Qd6+ Kf5 44.Qd7+ Kg6 45.Qd6+ Rf6 46.Qb4 h4 47.Qb1 
1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Pinal Borges, Nelson"]
[Black "Torre, Eugenio"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[ECO "B03"]
[EventDate "1971.08.02"]
[PlyCount "117"]

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.d4 d6 5.f4 Bf5 6.Nc3 e6 7.Nf3 Be7 8.Be3 O-O 
9.exd6 cxd6 10.b3 d5 11.c5 N6d7 12.Bd3 Bxd3 13.Qxd3 Nc6 14.O-O Bf6 15.Rfd1
b6 16.cxb6 axb6 17.Qb5 Qc7 18.Rac1 Rfc8 19.Ne5 Bxe5 20.fxe5 f6 21.exf6 
Nxf6 22.Qe2 Qd7 23.Bf4 Qe7 24.Be5 Nxe5 25.Qxe5 h6 26.h3 Kh8 27.Na4 Qa3 28.
Rxc8+ Rxc8 29.Rf1 Rc1 30.Qxe6 Rxf1+ 31.Kxf1 Qc1+ 32.Qe1 Qc2 33.Nxb6 Qxa2 
34.Nxd5 Qa6+ 35.Kg1 Qd3 36.Nxf6 Qxd4+ 37.Qf2 Qa1+ 38.Kh2 gxf6 39.Qf4 Kg7 
40.b4 Qb2 41.Qb8 f5 42.Qd6 Kf7 43.Qc7+ Kf6 44.Qf4 h5 45.Qb8 Qf2 46.Qd6+ 
Kf7 47.b5 f4 48.Qd5+ Ke7 49.Qd3 h4 50.b6 Qxb6 51.Qh7+ Kf8 52.Qxh4 Qd6 53.
Qh8+ Ke7 54.Qg7+ Ke8 55.Qh8+ Ke7 56.Qh7+ Kf8 57.Qf5+ Kg7 58.Qg4+ Kh6 59.
Qf3 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Rogoff, Kenneth"]
[Black "Poutiainen, Pertti"]
[Result "0-1"]
[WhiteElo "2425"]
[ECO "B08"]
[EventDate "1971.08.02"]
[PlyCount "108"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O c6 7.a4 a5 8.Re1 Na6 
9.h3 Nb4 10.Bf1 e5 11.Bg5 h6 12.Be3 Re8 13.dxe5 dxe5 14.Qxd8 Rxd8 15.Rac1 
Re8 16.Nd2 Be6 17.Nc4 Nd7 18.Nb1 Reb8 19.Nbd2 b6 20.Na3 Na6 21.Bc4 Nac5 
22.Bxe6 Nxe6 23.Rcd1 Ndc5 24.b3 b5 25.axb5 cxb5 26.f3 Nd4 27.Rb1 Ra6 28.c3
Nde6 29.Nc2 Rd6 30.c4 Rbd8 31.Nf1 b4 32.Bxc5 Nxc5 33.Na1 Rd3 34.Re2 Rd1 
35.Reb2 f5 36.Kh2 fxe4 37.fxe4 Nxe4 38.Ne3 Rxb1 39.Rxb1 Nc3 40.Re1 e4 41.
Nac2 Be5+ 42.Kg1 Rd2 43.c5 Ne2+ 44.Kh1 Ng3+ 45.Kg1 Ne2+ 46.Kh1 Bc7 47.Rd1 
Rxd1+ 48.Nxd1 a4 49.bxa4 b3 50.Nce3 Bf4 51.Nd5 e3 52.Nb2 Ng3+ 53.Kh2 e2 
54.Nd3 b2 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Hausner, Ivan"]
[Black "Haik, Aldo"]
[Result "1-0"]
[ECO "B05"]
[EventDate "1971.08.02"]
[PlyCount "55"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 g6 6.exd6 Qxd6 7.h3 Bxf3 8.Bxf3 
c6 9.O-O Bg7 10.c3 O-O 11.Nd2 Nd7 12.Re1 Rfe8 13.Nc4 Qc7 14.Bg5 N5b6 15.
Nxb6 Nxb6 16.Bh4 Bh6 17.a4 a5 18.Qb3 Bf4 19.Re4 Nd5 20.Rae1 Kg7 21.c4 Nf6 
22.Bxf6+ Kxf6 23.d5 Kg7 24.dxc6 bxc6 25.Qc3+ Kg8 26.Rxf4 Qxf4 27.Bxc6 e6 
28.Bxe8 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Hug, Werner"]
[Black "Rogoff, Kenneth"]
[Result "1/2-1/2"]
[BlackElo "2425"]
[ECO "B25"]
[EventDate "1971.08.02"]
[PlyCount "37"]

1.e4 c5 2.Nc3 d6 3.g3 g6 4.Bg2 Bg7 5.d3 Nc6 6.Nh3 Nf6 7.O-O O-O 8.f3 Bxh3 
9.Bxh3 Rb8 10.Be3 b5 11.Qd2 b4 12.Ne2 Qc7 13.f4 Nd7 14.Rab1 Rb6 15.f5 Ra6 
16.Nf4 Qd8 17.fxg6 hxg6 18.Nxg6 fxg6 19.Be6+ 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Poutiainen, Pertti"]
[Black "Ogaard, Leif"]
[Result "0-1"]
[BlackElo "2340"]
[ECO "B03"]
[EventDate "1971.08.02"]
[PlyCount "62"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 7.Be3 Bf5 8.Nc3 e6
9.Nf3 Nb4 10.Rc1 c5 11.Be2 Be7 12.O-O O-O 13.a3 cxd4 14.Nxd4 Nc6 15.Nxf5 
exf5 16.Rxf5 g6 17.Rf1 Bg5 18.Bxg5 Qxg5 19.Qd3 Rad8 20.Ne4 Qxe5 21.Nf6+ 
Kg7 22.Qh3 h6 23.Ng4 Qg5 24.Rcd1 Nd4 25.Bd3 Na4 26.Rf2 Nc5 27.Kf1 Nf5 28.
Be2 Ne4 29.Rxf5 Qxf5+ 30.Kg1 Rxd1+ 31.Bxd1 h5 0-1

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Ribli, Zoltan"]
[Black "Pinal Borges, Nelson"]
[Result "1-0"]
[WhiteElo "2440"]
[ECO "B87"]
[EventDate "1971.08.02"]
[PlyCount "89"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.O-O Be7
9.f4 O-O 10.e5 dxe5 11.fxe5 Nfd7 12.Bf4 Bb7 13.Qg4 Kh8 14.Kh1 Nc5 15.Rad1 
Qc7 16.Rde1 Nc6 17.Nf3 Rad8 18.Ng5 Nd4 19.Qh5 Bxg5 20.Bxg5 Qc6 21.Qh3 Rd7 
22.Ne2 Nxe2 23.Rxe2 Nxb3 24.cxb3 Qd5 25.Qh5 Qd3 26.h3 Qg6 27.Qh4 Rc8 28.
Rff2 Qb1+ 29.Kh2 Qg6 30.Be7 Rc1 31.Bd6 Qb1 32.Rd2 Rh1+ 33.Kg3 Qg6+ 34.Qg4 
Qh6 35.Rde2 Bd5 36.Rc2 Bb7 37.Rf4 f5 38.exf6 gxf6 39.Qxe6 Rg7+ 40.Rg4 
Rxg4+ 41.Qxg4 Qe3+ 42.Kh4 f5 43.Qg5 Qd4+ 44.Bf4 Rf1 45.g3 1-0

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Torre, Eugenio"]
[Black "Borngasser, Rene"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[BlackElo "2340"]
[ECO "A00"]
[EventDate "1971.08.02"]
[PlyCount "52"]

1.g3 f5 2.Bg2 Nf6 3.d3 g6 4.c4 Bg7 5.Nc3 O-O 6.f4 d6 7.Nf3 Nc6 8.O-O e5 9.
e3 Re8 10.Qd2 h6 11.Ne1 Be6 12.b4 Nxb4 13.Rb1 Nc6 14.Rxb7 Na5 15.Rb1 c6 
16.Nc2 Bf7 17.fxe5 dxe5 18.e4 Be6 19.Ne3 Ng4 20.Na4 Qd4 21.h3 Nxe3 22.Qxe3
Rad8 23.Qxd4 Rxd4 24.Nc5 Bc8 25.Be3 Rdd8 26.Kh2 Bf8 1/2-1/2

[Event "11th World U20 final A"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Vaganian, Rafael"]
[Black "Barle, Janez"]
[Result "1-0"]
[WhiteElo "2510"]
[BlackElo "2260"]
[ECO "D47"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 
Bb7 9.e4 b4 10.Na4 c5 11.e5 Nd5 12.O-O cxd4 13.Re1 Be7 14.Nxd4 O-O 15.Qg4 
Re8 16.Bh6 Bf8 17.Bg5 Qb8 18.Qg3 f6 19.Qh3 Nxe5 20.Qxh7+ Kf7 21.Qh5+ Ke7 
22.Nc5 fxg5 23.Nxb7 Nxd3 24.Rxe6+ Kd7 25.Qf7+ Ne7 26.Rd6+ Qxd6 27.Nxd6 
Kxd6 28.Qe6+ Kc5 29.Nb3+ Kb5 30.Qd7+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Cox, David"]
[Black "Herzog, Adolf"]
[Result "1/2-1/2"]
[BlackElo "2400"]
[ECO "A36"]
[EventDate "1971.08.02"]
[PlyCount "50"]

1.c4 g6 2.Nc3 Bg7 3.g3 c5 4.Bg2 Nc6 5.e3 d6 6.Nge2 Nf6 7.O-O O-O 8.b3 Bf5 
9.d3 Qc8 10.Bb2 Bh3 11.Nf4 Bxg2 12.Kxg2 e6 13.Ne4 Nxe4 14.Bxg7 Nxf2 15.
Rxf2 Kxg7 16.Qg4 Kh8 17.Qg5 Qd8 18.Qh6 Ne7 19.e4 Ng8 20.Qh3 Qg5 21.Raf1 
Rae8 22.Nxe6 Rxe6 23.Rxf7 Rxf7 24.Rxf7 Nf6 25.Qxe6 Qd2+ 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "De Villiers, Charles"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1-0"]
[ECO "C21"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 e5 2.d4 exd4 3.c3 d5 4.exd5 Qxd5 5.cxd4 Nc6 6.Be3 Nf6 7.Nc3 Qa5 8.Nf3
Bb4 9.Qc2 O-O 10.Bd3 Bg4 11.Nd2 Rfe8 12.O-O Rad8 13.a3 Bf8 14.Bb5 Nxd4 15.
Bxd4 Rxd4 16.Bxe8 Nxe8 17.Nb3 Qb6 18.Nxd4 Qxd4 19.Qe4 Qd7 20.h3 Bf5 21.
Qxb7 h6 22.Rad1 Nd6 23.Qxa7 Qc6 24.Qd4 Kh7 25.Rc1 Be6 26.Rfe1 Qb7 27.b4 
Qa8 28.a4 Be7 29.a5 Bg5 30.Rcd1 Bf6 31.Qc5 Nf5 32.Nd5 Nh4 33.Re3 Kh8 34.
Rg3 Be5 35.Nxc7 Qe4 36.Nxe6 fxe6 37.Rg4 Qe2 38.Qf8+ Kh7 39.Qd8 Nf5 40.Qd3 
Qb2 41.a6 Bb8 42.Re4 Ba7 43.Re2 Qxb4 44.Rxe6 Qf4 45.Re2 Bb8 46.g3 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Jamieson, Robert Murray"]
[Black "Biriescu, Ioan"]
[Result "1/2-1/2"]
[ECO "C68"]
[EventDate "1971.08.02"]
[PlyCount "36"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.Nc3 Bg4 6.h3 Bxf3 7.Qxf3 Qd7 8.d3
O-O-O 9.Qg4 Qxg4 10.hxg4 Bc5 11.Ke2 Nf6 12.Bg5 Rd6 13.f3 Nd7 14.Rh2 Rg6 
15.Bd2 Be7 16.Rah1 h6 17.Rh5 Re8 18.Nd1 c5 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Ost-Hansen, Jacob"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "1-0"]
[ECO "B06"]
[EventDate "1971.08.02"]
[PlyCount "65"]

1.e4 d6 2.Nc3 g6 3.g3 Bg7 4.Bg2 Nf6 5.d3 O-O 6.f4 e5 7.Nf3 Bg4 8.h3 Bxf3 
9.Qxf3 Nbd7 10.f5 c6 11.g4 Re8 12.O-O Rc8 13.h4 d5 14.Bh3 Kh8 15.Rf2 gxf5 
16.Qxf5 Rc7 17.Qf3 Nf8 18.Bg5 d4 19.Ne2 Re6 20.Ng3 h6 21.Bd2 N6h7 22.Nf5 
Ng6 23.g5 hxg5 24.Nxg7 Nxh4 25.Qg3 Kxg7 26.Bxe6 fxe6 27.Qxe5+ Kg6 28.Qxe6+
Kh5 29.Raf1 Re7 30.Qh3 Qd6 31.Rg2 Re5 32.Qg4+ Kh6 33.Qxh4+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Piasetski, Leon David"]
[Black "Dieks, Roy"]
[Result "1/2-1/2"]
[ECO "B51"]
[EventDate "1971.08.02"]
[PlyCount "163"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Nd7 4.d4 cxd4 5.Qxd4 Nf6 6.O-O g6 7.e5 dxe5 8.Nxe5
Bg7 9.Rd1 O-O 10.Nxd7 Bxd7 11.Bxd7 Nxd7 12.Qxd7 Qxd7 13.Rxd7 Rad8 14.Rxd8 
Rxd8 15.Nd2 Bh6 16.Nf1 Rd1 17.Bxh6 Rxa1 18.a3 Rb1 19.b3 Rb2 20.g3 Rxc2 21.
a4 f6 22.Be3 b6 23.h4 e5 24.Nd2 Kf7 25.Kf1 a6 26.Ne4 Rb2 27.Bxb6 Rxb3 28.
a5 Ke7 29.Nc5 Rb1+ 30.Ke2 Kd6 31.Nxa6 Kc6 32.Nc7 Rb3 33.Ne8 f5 34.Nf6 h5 
35.Nh7 Rb2+ 36.Kf3 Rd2 37.Be3 Ra2 38.Bb6 Rd2 39.Ke3 Rd7 40.Ng5 Rd5 41.Nf7 
Kb5 42.Ke2 Kc6 43.Ng5 Rd6 44.Nf3 Rd5 45.Ne1 Kb5 46.Nf3 Kc6 47.Nd2 Kb5 48.
Kd1 Kc6 49.Kc2 f4 50.gxf4 exf4 51.Nf3 Kb7 52.Kc3 Rd1 53.Kc4 Ka6 54.Nd4 g5 
55.hxg5 h4 56.Nf3 h3 57.Bd4 Rg1 58.Nxg1 h2 59.f3 h1=Q 60.g6 Qh5 61.g7 Qb5+
62.Kc3 Qxa5+ 63.Kd3 Qf5+ 64.Kd2 Qd5 65.Ne2 Kb7 66.Ke1 Kc6 67.Nxf4 Qxd4 68.
g8=Q Qxf4 69.Qe6+ Kc5 70.Ke2 Kd4 71.Qb6+ Ke5 72.Qc5+ Kf6 73.Qc6+ Ke5 74.
Qc3+ Kf5 75.Qc8+ Ke5 76.Qe8+ Kf6 77.Qh8+ Kf5 78.Qh5+ Qg5 79.Qh7+ Qg6 80.
Qh3+ Kf4 81.Qh2+ Kf5 82.Qh3+ 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Wach, Slawomir"]
[Black "Leow, Leslie"]
[Result "1/2-1/2"]
[ECO "C03"]
[EventDate "1971.08.02"]
[PlyCount "55"]

1.e4 e6 2.d4 d5 3.Nd2 a6 4.Ngf3 Nf6 5.exd5 exd5 6.Bd3 Bd6 7.Qe2+ Qe7 8.
Qxe7+ Kxe7 9.O-O Re8 10.Re1+ Kf8 11.Rxe8+ Kxe8 12.c4 dxc4 13.Nxc4 Be7 14.
Bd2 Nc6 15.Nce5 Nd8 16.Rc1 c6 17.Nc4 Be6 18.Nb6 Ra7 19.Bf4 Nd7 20.Nc8 Ra8 
21.Nxe7 Kxe7 22.Re1 h6 23.Ne5 Nxe5 24.Bxe5 f6 25.Bg3 Kd7 26.a3 Bd5 27.f3 
Ne6 28.Bf5 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Biriescu, Ioan"]
[Black "Piasetski, Leon David"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1971.08.02"]
[PlyCount "72"]

1.e4 d6 2.d4 g6 3.c3 Bg7 4.Nf3 b6 5.Bd3 Bb7 6.O-O Nd7 7.Re1 e5 8.Bg5 Ne7 
9.a4 a6 10.Qd2 h6 11.Be3 f5 12.dxe5 dxe5 13.exf5 gxf5 14.Nh4 e4 15.Be2 Ne5
16.Bh5+ Kf8 17.Bd4 c5 18.Bxe5 Bxe5 19.Rd1 Qxd2 20.Nxd2 Bf6 21.Ng6+ Nxg6 
22.Bxg6 e3 23.Nc4 Rg8 24.Rd7 Rxg6 25.Rxb7 e2 26.f4 Rd8 27.Ne3 Rd2 28.Rxb6 
Bd4 29.Rb8+ Kf7 30.Rb7+ Ke8 31.cxd4 cxd4 32.Rc1 Rc6 33.Rb8+ Kd7 34.Rb7+ 
Kc8 35.Rxc6+ Kxb7 36.Rc1 dxe3 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Ost-Hansen, Jacob"]
[Result "0-1"]
[ECO "B13"]
[EventDate "1971.08.02"]
[PlyCount "134"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 7.Qb3 Qc8 8.Nd2 
e6 9.h3 Bh5 10.Ngf3 Be7 11.O-O O-O 12.Ne5 Nxe5 13.Bxe5 Bg6 14.Qc2 b5 15.
Bxg6 hxg6 16.Qb3 Qc6 17.a4 a6 18.Ra2 Nd7 19.Nf3 Qc4 20.Nd2 Qxb3 21.Nxb3 b4
22.cxb4 Bxb4 23.Bc7 Rfc8 24.Rc1 g5 25.Raa1 a5 26.Rc6 Nb6 27.Nc5 Nc4 28.Nd3
Bd6 29.Rxd6 Rxc7 30.Rc1 Rb7 31.Rc6 Nxb2 32.Rb1 Rab8 33.Nc5 Rb6 34.Rxb6 
Rxb6 35.Nd7 Rb4 36.Nc5 Nd3 37.Rxb4 Nxb4 38.Kf1 Nc6 39.Nb3 Kf8 40.Ke2 Ke7 
41.Ke3 Kf6 42.g3 Ke7 43.Kf3 f6 44.Ke3 Kd6 45.Kf3 Ke7 46.Ke3 Kd6 47.Kf3 e5 
48.dxe5+ Kxe5 49.Ke3 d4+ 50.Kd3 Kd5 51.f3 Ne5+ 52.Kc2 Nc6 53.Kd3 f5 54.f4 
gxf4 55.gxf4 Nb4+ 56.Kd2 Nc6 57.Kd3 g6 58.h4 Nb4+ 59.Kd2 Na6 60.Nxa5 Nc5 
61.Ke2 Nxa4 62.Kf3 Nc5 63.Ke2 Ke4 64.Nc6 Ne6 65.Kd2 Nxf4 66.Ne7 d3 67.Kd1 
Nd5 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Cox, David"]
[Black "De Villiers, Charles"]
[Result "0-1"]
[ECO "A31"]
[EventDate "1971.08.02"]
[PlyCount "54"]

1.c4 Nf6 2.d4 c5 3.Nf3 g6 4.e3 Bg7 5.Be2 d5 6.O-O cxd4 7.Nxd4 O-O 8.b3 e5 
9.Nf3 Nc6 10.Bb2 Re8 11.Na3 Bf5 12.cxd5 Nxd5 13.Bb5 Ndb4 14.Nc4 Bd3 15.
Bxc6 Nxc6 16.Re1 e4 17.Nfd2 Nb4 18.Bxg7 Kxg7 19.Na3 Qf6 20.Ndc4 Red8 21.
Qd2 a5 22.Nxa5 Rxa5 23.Qxb4 Rda8 24.Nc4 Rxa2 25.Rxa2 Rxa2 26.f4 exf3 27.
gxf3 Qg5+ 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Herzog, Adolf"]
[Black "Dieks, Roy"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[ECO "B87"]
[EventDate "1971.08.02"]
[PlyCount "93"]

1.Nc3 c5 2.Nf3 Nf6 3.e4 d6 4.d4 cxd4 5.Nxd4 a6 6.Bc4 e6 7.Bb3 b5 8.Be3 b4 
9.Na4 Nxe4 10.Qg4 Nf6 11.Qg3 Bd7 12.O-O-O d5 13.Rhe1 Qa5 14.Nxe6 Bxe6 15.
Nb6 Ne4 16.Qe5 Nc6 17.Rxd5 Nxe5 18.Rxa5 Rd8 19.Rxe5 Nf6 20.Bxe6 fxe6 21.
Rxe6+ Kf7 22.Bg5 Bc5 23.Bxf6 gxf6 24.f3 h5 25.c4 bxc3 26.bxc3 Rhg8 27.g3 
Rd3 28.Kc2 Rxf3 29.Nd7 Bf2 30.Re7+ Kg6 31.R1e6 Rf5 32.Rxa6 Rc8 33.Ne5+ Kg5
34.Rg7+ Kh6 35.Rg6+ Kh7 36.Rgxf6 Rxf6 37.Rxf6 Bd4 38.Rf7+ Kg8 39.Rf5 Rxc3+
40.Kd1 Ra3 41.Nc6 Bg1 42.Rxh5 Rxa2 43.h4 Rg2 44.Rg5+ Kh7 45.h5 Kh6 46.Rg8 
Kxh5 47.Ne5 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Leow, Leslie"]
[Black "Jamieson, Robert Murray"]
[Result "1-0"]
[ECO "C10"]
[EventDate "1971.08.02"]
[PlyCount "63"]

1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Be7 5.Nf3 Nf6 6.Bd3 Nbd7 7.O-O O-O 8.c3 
Nxe4 9.Bxe4 c5 10.Bc2 cxd4 11.Qd3 g6 12.Nxd4 e5 13.Nf3 Bf6 14.Bh6 Re8 15.
Qe3 Qc7 16.Rad1 Nb6 17.Ng5 Be6 18.Nxe6 Rxe6 19.Bb3 Ree8 20.f4 Nc4 21.Qe4 
b5 22.f5 g5 23.Rd5 Qb6+ 24.Kh1 Rad8 25.Bxc4 bxc4 26.Qxc4 Rxd5 27.Qxd5 e4 
28.h4 e3 29.Re1 Bxc3 30.Qd7 Rf8 31.Bxf8 Bxe1 32.Qe8 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Wach, Slawomir"]
[Result "0-1"]
[ECO "B28"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nb3 Bb4 7.Bd3 d5 8.Nd2 
O-O 9.O-O d4 10.Ne2 Nc6 11.a3 Be7 12.f4 Ng4 13.Nf3 exf4 14.Nxf4 Bd6 15.Nd5
Be6 16.h3 Nge5 17.Ng5 h6 18.Nxe6 fxe6 19.Nf4 Qh4 20.Nxe6 Rxf1+ 21.Qxf1 
Nxd3 22.cxd3 Re8 23.Bg5 hxg5 24.Qf5 Ne7 25.Qa5 Qg3 26.Rf1 Qe5 27.Qxe5 Bxe5
28.Nxg5 Rc8 29.Nf7 Bg3 30.e5 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "De Villiers, Charles"]
[Black "Herzog, Adolf"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "A01"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.b3 c5 2.Bb2 d5 3.e3 Nc6 4.Bb5 Bd7 5.f4 a6 6.Be2 Qc7 7.Nf3 Nf6 8.O-O e6 
9.Qe1 Bd6 10.Qg3 O-O-O 11.Qxg7 Ne4 12.d3 Rdg8 13.Qxf7 Rf8 14.Qh5 Nf6 15.
Qh4 e5 16.fxe5 Nxe5 17.Nxe5 Bxe5 18.d4 cxd4 19.exd4 Bd6 20.Nc3 Be7 21.Qe1 
Rhg8 22.Kh1 Rg6 23.Qd2 Rfg8 24.Bf3 Bg4 25.Nxd5 Bxf3 26.Nxe7+ Qxe7 27.gxf3 
Ne4 28.Qe1 Ng3+ 29.hxg3 Rxg3 30.Rf2 Rh3+ 31.Rh2 Rxh2+ 32.Kxh2 Qd6+ 33.Kh3 
Qg6 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Dieks, Roy"]
[Black "Biriescu, Ioan"]
[Result "0-1"]
[ECO "E98"]
[EventDate "1971.08.02"]
[PlyCount "132"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Be2 d6 6.Nf3 e5 7.O-O Nc6 8.d5 Ne7 
9.Ne1 Nd7 10.Nd3 f5 11.Bd2 fxe4 12.Nxe4 Nf5 13.f3 Nd4 14.Ndf2 Nf6 15.Nxf6+
Bxf6 16.Ne4 Bf5 17.Be3 Bg7 18.Bd3 c5 19.Ng3 Qd7 20.Qd2 Rab8 21.Bxd4 cxd4 
22.a4 Qe7 23.b4 Rbc8 24.Rfe1 Qh4 25.Qc2 Bxd3 26.Qxd3 Bh6 27.Ne4 Be3+ 28.
Kh1 Rf5 29.g3 Qd8 30.Kg2 Rf7 31.Qb3 b6 32.a5 Qc7 33.axb6 axb6 34.Re2 Rcf8 
35.Rf1 Ra8 36.Rc2 Kh8 37.Ra2 Rc8 38.Rc2 Kg7 39.Ra1 Rcf8 40.Rf1 Ra8 41.Ra2 
Rc8 42.Rc2 Qd8 43.Ra1 Qf8 44.Rf1 Ra7 45.Ra2 Rxa2+ 46.Qxa2 Ra8 47.Qb2 Ra7 
48.Ra1 Rf7 49.Qe2 Qd8 50.Ra6 Kh6 51.Qa2 Qd7 52.Qe2 Qc7 53.c5 dxc5 54.bxc5 
bxc5 55.d6 Qc8 56.Ra5 Qe6 57.Rxc5 Ra7 58.Rc2 Qf7 59.h4 Ra1 60.Qd3 Rg1+ 61.
Kh3 Qf5+ 62.Kh2 Qxf3 63.Kh3 Rh1+ 64.Rh2 Qf5+ 65.g4 Qf3+ 66.Ng3 Rg1 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Jamieson, Robert Murray"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "0-1"]
[ECO "B22"]
[EventDate "1971.08.02"]
[PlyCount "86"]

1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 Nc6 5.Nf3 Bg4 6.Be2 e6 7.Be3 cxd4 8.cxd4 
Nf6 9.O-O Be7 10.Nc3 Qd7 11.Qd2 Nd5 12.Rfd1 O-O 13.Rac1 Rfd8 14.h3 Bh5 15.
Ne5 Nxe5 16.Bxh5 Nc4 17.Qe2 Ncxe3 18.fxe3 Bg5 19.Nxd5 exd5 20.Rc5 b6 21.
Rc3 Re8 22.Bf3 Qe6 23.Re1 Re7 24.Qb5 Rae8 25.Bxd5 Qf6 26.Rf1 Bxe3+ 27.Kh1 
a6 28.Qxa6 Qxd4 29.Qb5 Kh8 30.Rc7 f6 31.Bf7 Qd8 32.Bxe8 Qxc7 33.Bc6 Qg3 
34.Qd3 Qc7 35.Be4 Bc5 36.Bxh7 g5 37.Be4 Qe5 38.Bf3 Bd6 39.g3 Qxg3 40.Qd2 
Rh7 41.Bg4 Qxg4 42.Qg2 Rxh3+ 43.Kg1 Rg3 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Ost-Hansen, Jacob"]
[Black "Cox, David"]
[Result "1-0"]
[ECO "B26"]
[EventDate "1971.08.02"]
[PlyCount "73"]

1.e4 c5 2.d3 g6 3.g3 Bg7 4.Bg2 e6 5.Nc3 Nc6 6.Be3 Nd4 7.Qd2 d6 8.h4 h5 9.
Nh3 Nh6 10.f3 Bd7 11.O-O b5 12.Nd1 e5 13.Nc3 Bc6 14.Bg5 f6 15.Be3 b4 16.
Nd5 Bxd5 17.exd5 Ndf5 18.Bf2 O-O 19.a3 a5 20.c3 bxc3 21.bxc3 Qc7 22.d4 
Rab8 23.Qd3 c4 24.Qe4 Rb3 25.g4 hxg4 26.fxg4 Ne7 27.dxe5 dxe5 28.d6 f5 29.
gxf5 gxf5 30.Qe2 Qc8 31.dxe7 Re8 32.Bd5+ Kh8 33.Ng5 Rxe7 34.Qh5 Qa6 35.Bc5
Qb5 36.Bxe7 Qxd5 37.Rad1 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Piasetski, Leon David"]
[Black "Leow, Leslie"]
[Result "1/2-1/2"]
[ECO "A92"]
[EventDate "1971.08.02"]
[PlyCount "64"]

1.c4 f5 2.Nf3 Nf6 3.g3 e6 4.Bg2 Be7 5.d4 O-O 6.O-O d5 7.Nbd2 Ne4 8.Qc2 Nd7
9.Rb1 c6 10.b4 Bf6 11.Rb3 Re8 12.Bb2 b6 13.Rc1 Ba6 14.e3 Qe7 15.a4 Rec8 
16.Qb1 e5 17.b5 Bb7 18.dxe5 Nxe5 19.Bxe5 Bxe5 20.cxd5 cxd5 21.Nxe4 dxe4 
22.Nxe5 Qxe5 23.Bf1 Rxc1 24.Qxc1 Rc8 25.Qd2 Qd5 26.Qxd5+ Bxd5 27.Ra3 Rc2 
28.Ra1 Kf7 29.a5 Ra2 30.Rd1 Ke6 31.axb6 axb6 32.Rc1 g5 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Wach, Slawomir"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1-0"]
[ECO "C85"]
[EventDate "1971.08.02"]
[PlyCount "73"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6 dxc6 7.d3 Qd6 8.Nbd2
b5 9.a4 Bg4 10.b3 O-O 11.h3 Bh5 12.Bb2 Nd7 13.g4 Bg6 14.Kg2 h5 15.Rh1 Rae8
16.Nf1 hxg4 17.hxg4 Qe6 18.Ne3 Bc5 19.Nf5 f6 20.N3h4 Bh7 21.Nxg7 Kxg7 22.
Nf5+ Kg8 23.Rxh7 Kxh7 24.Qh1+ Kg8 25.Qh6 Qxf5 26.gxf5 Re7 27.Rg1 Rg7+ 28.
Kf1 Rxg1+ 29.Kxg1 Rf7 30.Kf1 Rg7 31.Qh5 Kf8 32.Bc1 Ke7 33.Qh8 Rf7 34.axb5 
axb5 35.Qa8 Kd6 36.Bh6 Nb6 37.Qe8 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Jamieson, Robert Murray"]
[Result "1-0"]
[ECO "C00"]
[EventDate "1971.08.02"]
[PlyCount "67"]

1.e4 e6 2.b3 d5 3.Bb2 Nf6 4.Nc3 dxe4 5.Qe2 Nbd7 6.g4 b6 7.Bg2 Bb7 8.h4 Nc5
9.Nh3 Qd7 10.g5 Nd5 11.Nxe4 Nxe4 12.Bxe4 O-O-O 13.O-O-O h6 14.Qf3 hxg5 15.
hxg5 Rh4 16.d3 c5 17.a3 Qc7 18.Kb1 Ba6 19.c4 Nf4 20.Nxf4 Rxf4 21.Qe3 Be7 
22.Rh7 Rg4 23.Rxg7 Qf4 24.Qe2 Rh4 25.Be5 Qg4 26.Bf3 Qf5 27.g6 Bf6 28.Bxf6 
Qxf6 29.Rxf7 Qxg6 30.Rxa7 Qf6 31.Rxa6 Rf4 32.Rh1 Rdd4 33.Rh7 Rd7 34.Ra8+ 
1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Cox, David"]
[Black "Wach, Slawomir"]
[Result "1/2-1/2"]
[ECO "B28"]
[EventDate "1971.08.02"]
[PlyCount "41"]

1.e4 c5 2.Nf3 a6 3.c3 d5 4.exd5 Qxd5 5.d4 e6 6.Be3 cxd4 7.cxd4 Nf6 8.Bd3 
Be7 9.O-O Nbd7 10.Nc3 Qd6 11.Nd2 O-O 12.Nc4 Qb8 13.Qf3 b5 14.Na5 Bd6 15.h3
Nb6 16.Nc6 Qc7 17.Ne5 Bb7 18.Qe2 b4 19.Nd1 h6 20.f4 Ne4 21.Qg4 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "De Villiers, Charles"]
[Black "Ost-Hansen, Jacob"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1971.08.02"]
[PlyCount "62"]

1.g3 Nf6 2.Bg2 d5 3.Nf3 Bf5 4.O-O c6 5.d3 e6 6.Nbd2 Be7 7.Qe1 h6 8.e4 Bh7 
9.Qe2 a5 10.a4 O-O 11.e5 Nfd7 12.Nd4 Qb6 13.N2b3 Na6 14.Kh1 Ndc5 15.Nxc5 
Bxc5 16.Nb3 Nb4 17.f4 Nxd3 18.Nxc5 Nxc5 19.g4 Qa6 20.Qf2 Ne4 21.Qh4 f5 22.
exf6 Rxf6 23.Ra3 Raf8 24.Rh3 g5 25.Qh5 Qe2 26.Be3 c5 27.Bg1 gxf4 28.Rb3 
R8f7 29.Rff3 Bg6 30.Qh4 Kg7 31.Rb6 Ng5 {time} 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Herzog, Adolf"]
[Black "Biriescu, Ioan"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[ECO "C21"]
[EventDate "1971.08.02"]
[PlyCount "53"]

1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 Nc6 5.Nxc3 Nf6 6.Nf3 d6 7.O-O Be7 8.Nd4 
Nxd4 9.Qxd4 O-O 10.Bg5 Bd7 11.Rad1 Bc6 12.e5 Ne8 13.f4 Bxg5 14.fxg5 Qxg5 
15.Nd5 dxe5 16.Qc5 Nd6 17.Bb3 e4 18.h4 Qe5 19.Qe3 a5 20.a4 Rac8 21.Rf4 Kh8
22.Rg4 f5 23.Rg5 Nf7 24.Nf4 b6 25.Rh5 Qf6 26.Qc3 Qxc3 27.Ng6+ 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Leow, Leslie"]
[Black "Dieks, Roy"]
[Result "1-0"]
[ECO "C99"]
[EventDate "1971.08.02"]
[PlyCount "71"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 
9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Bb7 13.Nf1 cxd4 14.cxd4 Rac8 15.Bd3 
d5 16.dxe5 Nxe4 17.Ng3 f5 18.exf6 Bxf6 19.Bxe4 dxe4 20.Nxe4 Bxe4 21.Rxe4 
Rfd8 22.Qe1 Qc2 23.Re2 Qd3 24.Bg5 Bxg5 25.Nxg5 Nc4 26.b3 Na3 27.Re7 Qf5 
28.Qe6+ Qxe6 29.Nxe6 Rd6 30.Rxg7+ Kh8 31.Re7 h6 32.Re1 Rc2 33.Re4 Rcc6 34.
Re8+ Kh7 35.Nf8+ Kg8 36.R4e7 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Piasetski, Leon David"]
[Result "1-0"]
[ECO "A03"]
[EventDate "1971.08.02"]
[PlyCount "149"]

1.f4 Nf6 2.Nf3 d5 3.b3 Bg4 4.e3 Nbd7 5.Bb2 c6 6.h3 Bxf3 7.Qxf3 Qc7 8.d4 
Ne4 9.c3 Ndf6 10.Bd3 e6 11.Nd2 Nxd2 12.Kxd2 a5 13.a4 Qb6 14.Ba3 Bxa3 15.
Rxa3 O-O 16.g4 c5 17.g5 Ne4+ 18.Bxe4 dxe4 19.Qxe4 cxd4 20.exd4 Rac8 21.Rb1
Rfd8 22.b4 Rc4 23.bxa5 Qxa5 24.Kd3 Qa6 25.Ke3 Rxa4 26.Rxa4 Qxa4 27.Qxb7 
Qc2 28.Qc7 Rf8 29.Rb8 Qc1+ 30.Kd3 Qd1+ 31.Kc4 Qa4+ 32.Rb4 Qa8 33.Qb7 Qa2+ 
34.Kd3 Qf2 35.Qc7 Qf3+ 36.Kc2 Qa8 37.Kb2 g6 38.Rb7 h5 39.gxh6 Kh7 40.c4 
Kxh6 41.c5 Qa6 42.Qe7 Qe2+ 43.Kc3 Qe3+ 44.Kc4 Qc1+ 45.Kb5 Qb2+ 46.Kc6 Rc8+
47.Rc7 Ra8 48.Qg5+ Kg7 49.d5 Kg8 50.d6 Qb3 51.Kd7 Qb5+ 52.c6 Qb8 53.Qe7 
Kg7 54.h4 Kg8 55.f5 exf5 56.h5 Kg7 57.h6+ Kxh6 58.Qxf7 Kg5 59.Ke6 Qb3+ 60.
Ke7 Qe3+ 61.Kd7 Qb6 62.Qe7+ Kg4 63.Rb7 Qa6 64.Rb4+ Kf3 65.Rb7 Rg8 66.Qh7 
Qc4 67.Rb3+ Kg4 68.Rb4 Qxb4 69.Qxg8 g5 70.c7 Qb5+ 71.Ke7 Qe5+ 72.Qe6 Qg7+ 
73.Ke8 Qh8+ 74.Kd7 Qg7+ 75.Qe7 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Biriescu, Ioan"]
[Black "Leow, Leslie"]
[Result "1-0"]
[ECO "A08"]
[EventDate "1971.08.02"]
[PlyCount "95"]

1.e4 e6 2.d3 d5 3.Nd2 c5 4.Ngf3 Nc6 5.g3 g6 6.Bg2 Bg7 7.O-O Nge7 8.Re1 O-O
9.e5 b5 10.Nf1 a5 11.Ne3 h6 12.Ng4 Nf5 13.Bf4 Ba6 14.Qc1 Kh7 15.h4 Rc8 16.
Ne3 Nfe7 17.Ng4 Ng8 18.Kh2 d4 19.Rh1 h5 20.Bg5 Nce7 21.Nf6+ Bxf6 22.exf6 
Nd5 23.Ne5 Ndxf6 24.Qf4 Kg7 25.g4 Qc7 26.Bf3 hxg4 27.Nxg4 Nxg4+ 28.Bxg4 
Qxf4+ 29.Bxf4 Bb7 30.Rhg1 Nh6 31.Bh3 Kh7 32.Rae1 Bd5 33.a3 Rc6 34.Rg5 f6 
35.Rgg1 Nf7 36.Bd2 Ne5 37.Bg2 Bxg2 38.Kxg2 a4 39.Re4 Kg7 40.h5 gxh5 41.Rh1
Kg6 42.Reh4 Rh8 43.f4 Nf7 44.Kf3 Rd6 45.Rg1+ Kh6 46.f5+ Ng5+ 47.Bxg5+ fxg5
48.Rxh5+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Dieks, Roy"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "1-0"]
[ECO "A57"]
[EventDate "1971.08.02"]
[PlyCount "75"]

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 e6 5.Nc3 exd5 6.Nxd5 Bb7 7.e4 Nxe4 8.Bc4 
Bd6 9.Nf3 O-O 10.Be3 a6 11.a4 Qa5+ 12.b4 Qd8 13.bxa6 Nxa6 14.b5 Nc7 15.Nb6
Nxb5 16.Nxa8 Nbc3 17.Qd3 Bxa8 18.O-O Qf6 19.Rfc1 g5 20.Ra3 g4 21.Ne1 Be5 
22.f4 Bd4 23.Nc2 d5 24.Bxd4 cxd4 25.Bb5 Qxf4 26.Rf1 Qd6 27.Raa1 Rb8 28.
Nxd4 Qc5 29.Kh1 Nxb5 30.axb5 Re8 31.Rf4 h5 32.Raf1 Nd6 33.Rxf7 Re4 34.Rf8+
Kg7 35.Qd2 Re5 36.Ne6+ Rxe6 37.Qg5+ Kh7 38.R8f7+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Jamieson, Robert Murray"]
[Black "Cox, David"]
[Result "1/2-1/2"]
[ECO "B03"]
[EventDate "1971.08.02"]
[PlyCount "128"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.exd6 exd6 5.c4 Nb6 6.Nc3 Nc6 7.Be3 Be7 8.Be2 
O-O 9.Nf3 Bg4 10.d5 Bxf3 11.Bxf3 Ne5 12.b3 Bg5 13.Bd4 f5 14.O-O Qf6 15.Be2
f4 16.f3 Nbd7 17.Ne4 Qh6 18.Rc1 Be7 19.Qd2 Rf5 20.g4 Rf7 21.Kg2 Raf8 22.h3
Ng6 23.b4 Nf6 24.Qd3 Nxe4 25.Qxe4 Bh4 26.Qc2 Bg3 27.Bd3 Re7 28.Be4 Rfe8 
29.c5 Qh4 30.cxd6 cxd6 31.Bxa7 Nh8 32.Bf2 Nf7 33.Bxg3 Qxg3+ 34.Kh1 Ng5 35.
Qh2 Nxe4 36.fxe4 Qxh2+ 37.Kxh2 Rxe4 38.a3 g5 39.Rf2 Re3 40.h4 h6 41.hxg5 
hxg5 42.Ra1 Rd3 43.a4 Ree3 44.Raa2 Rh3+ 45.Kg1 Rd1+ 46.Rf1 Rd4 47.a5 f3 
48.Rh2 Rxg4+ 49.Kh1 Rhg3 50.Rb1 Rd4 51.b5 Rgg4 52.a6 bxa6 53.bxa6 Ra4 54.
Rf1 Rxa6 55.Rh3 Rd4 56.Rhxf3 Rxd5 57.Kg2 Ra7 58.Kg3 Kg7 59.Kg4 Ra4+ 60.Kg3
Ra7 61.Kg4 Ra4+ 62.Kg3 g4 63.Rf4 Rxf4 64.Rxf4 Rd1 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Ost-Hansen, Jacob"]
[Black "Herzog, Adolf"]
[Result "1-0"]
[BlackElo "2400"]
[ECO "A21"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.g3 e5 2.c4 f5 3.Bg2 Nf6 4.Nc3 Bb4 5.Nf3 e4 6.Nd4 O-O 7.O-O d6 8.d3 Bxc3 
9.bxc3 Qe8 10.f4 Na6 11.Rb1 Nc5 12.Nb5 Qf7 13.Be3 a6 14.Na3 Ncd7 15.Qd2 
Re8 16.Nc2 b5 17.cxb5 axb5 18.a3 Rb8 19.Kh1 h5 20.h4 Qg6 21.Bf2 Bb7 22.d4 
e3 23.Nxe3 Ne4 24.Qe1 Ndf6 25.Rb2 Ng4 26.Nxg4 Qxg4 27.Kh2 Bd5 28.Bf3 Qg6 
29.Qc1 Kh8 30.Rb4 Nxg3 31.Bxg3 Bxf3 32.exf3 Re2+ 33.Rf2 Rbe8 34.Qg1 Re1 
35.Qg2 Qf7 36.Rd2 Ra1 37.Rxb5 Qc4 38.Rbb2 Re3 39.Re2 Rxc3 40.Rbd2 Rcc1 41.
Bf2 Rh1+ 42.Qxh1 Rxh1+ 43.Kxh1 Qc3 44.Kg2 Qxa3 45.Rc2 Qa6 46.Red2 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Piasetski, Leon David"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1-0"]
[ECO "D90"]
[EventDate "1971.08.02"]
[PlyCount "53"]

1.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.d4 d5 5.cxd5 Nxd5 6.Bd2 O-O 7.Rc1 Nc6 8.e3 
e5 9.Nxd5 Qxd5 10.Bc4 Qd6 11.d5 Ne7 12.Qb3 c6 13.dxc6 Nxc6 14.Bc3 Bg4 15.
Qxb7 Bxf3 16.gxf3 Rab8 17.Qa6 Rfd8 18.O-O Qf6 19.Be2 Rbc8 20.Rfd1 Qg5+ 21.
Kh1 Ne7 22.Ba5 Rxd1+ 23.Rxd1 h5 24.Rd8+ Rxd8 25.Bxd8 Bf8 26.Qxa7 Qf5 27.
Bxe7 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Wach, Slawomir"]
[Black "De Villiers, Charles"]
[Result "1-0"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 a6 5.c4 Nc6 6.Qd2 g6 7.b3 Nf6 8.Nc3 Bg7 
9.Bb2 O-O 10.Bd3 Bg4 11.Ng1 Rc8 12.h3 Bd7 13.Nf3 Nh5 14.O-O f5 15.exf5 
Bxf5 16.Bxf5 Rxf5 17.Ne2 Bxb2 18.Qxb2 Rxf3 19.gxf3 Qd7 20.Kg2 Rf8 21.Qd2 
Rf5 22.f4 Qe6 23.Qe3 Qf6 24.Rae1 Kf7 25.Qe4 Nxf4+ 26.Nxf4 Rxf4 27.Qd5+ Kg7
28.Re3 Rd4 29.Qe6 Qxe6 30.Rxe6 Rd2 31.a3 Ra2 32.b4 Rxa3 33.b5 Kf7 34.bxc6 
Kxe6 35.Re1+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Dieks, Roy"]
[Result "0-1"]
[ECO "B90"]
[EventDate "1971.08.02"]
[PlyCount "48"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.a4 e5 7.Nf3 Be7 8.Be2 O-O
9.O-O b6 10.Be3 Bb7 11.Nd2 Nbd7 12.Nc4 Nxe4 13.Nxe4 Bxe4 14.Nxd6 Bc6 15.
Qd2 Qc7 16.Rfd1 g6 17.Bh6 Rfd8 18.Bc4 Nf6 19.Bxf7+ Kh8 20.Nf5 gxf5 21.Qg5 
Rg8 22.Bxg8 Rxg8 23.Qxf5 Bxg2 24.Bg5 Be4 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Cox, David"]
[Black "Piasetski, Leon David"]
[Result "1-0"]
[ECO "B85"]
[EventDate "1971.08.02"]
[PlyCount "71"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be2 a6 7.O-O Nf6 8.Kh1 
Be7 9.f4 d6 10.Be3 O-O 11.Qe1 Bd7 12.Bf3 Rac8 13.Rd1 b5 14.a3 Nxd4 15.Bxd4
e5 16.Be3 a5 17.fxe5 dxe5 18.Rf2 b4 19.axb4 axb4 20.Nd5 Nxd5 21.exd5 Bd6 
22.Rc1 f5 23.g3 e4 24.Bg2 Qc4 25.Rd2 Be5 26.Bf1 Qc7 27.Bd4 h5 28.Qe3 h4 
29.d6 Qa5 30.Qg5 hxg3 31.hxg3 Rf6 32.b3 Bxd4 33.Rxd4 Qe5 34.Bc4+ Kh7 35.
Rd5 Rh6+ 36.Qxh6+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "De Villiers, Charles"]
[Black "Jamieson, Robert Murray"]
[Result "1-0"]
[ECO "C02"]
[EventDate "1971.08.02"]
[PlyCount "103"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 c4 7.Nbd2 Bd7 8.Be2 Nge7 
9.Bxc4 Na5 10.Bd3 Rc8 11.O-O Bb5 12.Qe2 Bxd3 13.Qxd3 Nf5 14.Rb1 Qc6 15.Re1
b5 16.Nf1 Qc4 17.Qd1 Qc6 18.Ne3 Nxe3 19.fxe3 f5 20.exf6 gxf6 21.Qe2 Bd6 
22.e4 dxe4 23.Qxe4 Qxe4 24.Rxe4 Kd7 25.Bf4 Nc4 26.Bxd6 Kxd6 27.Re2 a5 28.
Nd2 Nxd2 29.Rxd2 b4 30.Rd3 Rc4 31.axb4 axb4 32.Rf1 Rhc8 33.Rxf6 bxc3 34.
bxc3 Rxc3 35.Rxc3 Rxc3 36.Rf7 Kd5 37.Rxh7 Kxd4 38.Rh4+ Ke3 39.Rh3+ Kd2 40.
Rxc3 Kxc3 41.h4 Kd4 42.Kf2 Ke4 43.h5 Kf5 44.Kf3 e5 45.g4+ Kg5 46.Ke4 Kf6 
47.h6 Kg6 48.g5 Kf7 49.Kxe5 Kg6 50.Ke6 Kh7 51.Kf7 Kh8 52.h7 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Herzog, Adolf"]
[Black "Leow, Leslie"]
[Result "0-1"]
[WhiteElo "2400"]
[ECO "C25"]
[EventDate "1971.08.02"]
[PlyCount "40"]

1.Nc3 e5 2.e4 Bc5 3.Bc4 d6 4.d3 Nc6 5.Nf3 h6 6.Be3 Bb6 7.d4 Bg4 8.h3 exd4 
9.hxg4 dxe3 10.fxe3 Bxe3 11.Nd5 Bb6 12.Qd2 Nf6 13.O-O-O Nxg4 14.Nxb6 axb6 
15.Bxf7+ Kxf7 16.Qd5+ Ke7 17.Nh4 Nge5 18.Rhf1 Qg8 19.Nf5+ Kd7 20.Qb5 Qc4 
0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Ost-Hansen, Jacob"]
[Black "Wach, Slawomir"]
[Result "1/2-1/2"]
[ECO "A08"]
[EventDate "1971.08.02"]
[PlyCount "127"]

1.e4 c5 2.d3 e6 3.g3 d5 4.Nd2 Nc6 5.Bg2 g6 6.Ngf3 Bg7 7.O-O Nge7 8.c3 O-O 
9.Re1 e5 10.exd5 Nxd5 11.Nc4 Re8 12.Qb3 Nc7 13.Ng5 Ne6 14.Ne4 Bf8 15.h4 h6
16.Ned2 f6 17.a4 h5 18.Ne4 Kg7 19.Be3 Qc7 20.Qb5 Bd7 21.Qb3 f5 22.Ng5 Nxg5
23.Bxg5 Be6 24.Qc2 Bxc4 25.dxc4 e4 26.Rad1 Ne5 27.Bf4 Bd6 28.Rd5 Rad8 29.
Bg5 Rd7 30.Qd1 Nxc4 31.Bf1 Nb6 32.Rd2 Be5 33.Rxd7+ Nxd7 34.Bb5 Bd6 35.Re2 
Re6 36.Qd5 Re5 37.Qd1 Nb6 38.Rd2 Re6 39.a5 Nc8 40.Bf4 Bxf4 41.Rd7+ Re7 42.
Rxc7 Bxc7 43.a6 b6 44.Qd5 Nd6 45.Be2 Kf6 46.Kg2 e3 47.f3 Nf7 48.Qc6+ Bd6 
49.Bc4 e2 50.Bxe2 Rxe2+ 51.Kf1 Re7 52.f4 Kg7 53.Qb5 Bc7 54.Qc6 Bd6 55.Qb5 
Bb8 56.Qa4 Nd6 57.Qc6 c4 58.Qd5 Bc7 59.Qa8 Re8 60.Qc6 Bb8 61.Qd5 Kf6 62.
Qd4+ Kf7 63.Qd5+ Kg7 64.Qd4+ 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Biriescu, Ioan"]
[Result "1/2-1/2"]
[ECO "C32"]
[EventDate "1971.08.02"]
[PlyCount "33"]

1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nc3 Bf5 6.dxe4 Nxe4 7.Bb5+ c6 8.dxc6 
Nxc6 9.Qxd8+ Rxd8 10.Be3 Nxc3 11.bxc3 Bxc2 12.Ne2 Ba3 13.Nd4 Be4 14.O-O 
O-O 15.Rad1 Bb2 16.Nxc6 bxc6 17.Be2 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Biriescu, Ioan"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1-0"]
[ECO "C44"]
[EventDate "1971.08.02"]
[PlyCount "41"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.c3 Nf6 6.b4 Bb6 7.e5 d5 8.exf6 
dxc4 9.b5 Nb8 10.Qe2+ Be6 11.fxg7 Rg8 12.Nxd4 Rxg7 13.Nxe6 fxe6 14.Qh5+ 
Rf7 15.O-O Qd3 16.Bg5 h6 17.Rd1 hxg5 18.Rxd3 Bxf2+ 19.Kh1 cxd3 20.Nd2 Be3 
21.Rf1 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Dieks, Roy"]
[Black "Cox, David"]
[Result "1-0"]
[ECO "A50"]
[EventDate "1971.08.02"]
[PlyCount "73"]

1.d4 Nf6 2.c4 b6 3.Nc3 Bb7 4.Qc2 e6 5.e4 Bb4 6.e5 Ne4 7.a3 Bxc3+ 8.bxc3 f5
9.Ne2 O-O 10.h4 Nc6 11.f3 Ne7 12.fxe4 fxe4 13.Ng3 d5 14.cxd5 Bxd5 15.Nxe4 
Nf5 16.Bd3 c5 17.Bg5 Qd7 18.dxc5 h6 19.Bd2 Bxe4 20.Bxe4 Ng3 21.Bxa8 Qb5 
22.Be3 Rf1+ 23.Rxf1 Qxf1+ 24.Kd2 Qxa1 25.c6 Nf1+ 26.Ke2 Nxe3 27.c7 Nxc2 
28.c8=Q+ Kf7 29.Qd7+ Kf8 30.Qd2 Nxa3 31.Bc6 Kg8 32.Qd8+ Kh7 33.Be4+ g6 34.
Qe7+ Kg8 35.Qxe6+ Kf8 36.Qf6+ Kg8 37.Bd5+ 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Jamieson, Robert Murray"]
[Black "Ost-Hansen, Jacob"]
[Result "1-0"]
[ECO "B10"]
[EventDate "1971.08.02"]
[PlyCount "117"]

1.e4 c6 2.c4 d5 3.exd5 cxd5 4.cxd5 Nf6 5.Qa4+ Nbd7 6.Nc3 g6 7.g3 Bg7 8.Bg2
O-O 9.Nge2 Nc5 10.Qc4 b6 11.b4 Nb7 12.O-O Nd6 13.Qb3 Bf5 14.Re1 Qd7 15.Nd4
Bh3 16.Nc6 Bxg2 17.Kxg2 e6 18.b5 Nxd5 19.Nxd5 Bxa1 20.Bb2 Bxb2 21.Qxb2 f5 
22.Nde7+ Kf7 23.Ne5+ Kxe7 24.Nxd7 Kxd7 25.Qe5 Rfe8 26.Re3 Rad8 27.Rc3 Re7 
28.a4 h6 29.Rc6 Nf7 30.Qd4+ Ke8 31.Qf6 Rxd2 32.Rxe6 Rxe6 33.Qxe6+ Kf8 34.
Qc8+ Ke7 35.h3 Rd8 36.Qc2 h5 37.g4 hxg4 38.hxg4 Ke6 39.f4 Rd7 40.Qe2+ Kd6 
41.Kg3 Rd8 42.a5 bxa5 43.gxf5 gxf5 44.Qd3+ Ke6 45.Qe3+ Kf6 46.Qxa7 Rd3+ 
47.Kh4 Nd6 48.b6 Rb3 49.Qxa5 Ke7 50.Qa7+ Kf6 51.Qd7 Ne4 52.b7 Rb1 53.Kh3 
Rb3+ 54.Kg2 Rb2+ 55.Kf3 Rb3+ 56.Ke2 Rb2+ 57.Kd1 Nc3+ 58.Kc1 Re2 59.Qd4+ 
1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Leow, Leslie"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "1/2-1/2"]
[ECO "B24"]
[EventDate "1971.08.02"]
[PlyCount "65"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.f4 e6 6.Nf3 Nge7 7.d3 O-O 8.O-O d5 
9.e5 a6 10.Qe2 Qc7 11.Bd2 f5 12.exf6 Bxf6 13.Rae1 Bd7 14.Nd1 Rae8 15.c3 
Bg7 16.Nf2 b5 17.Ng4 b4 18.Nge5 Nxe5 19.Nxe5 bxc3 20.Bxc3 d4 21.Ba5 Qxa5 
22.Nxd7 Nf5 23.Nxf8 Bxf8 24.b3 Ne3 25.Rf3 Bg7 26.Kh1 e5 27.Rxe3 dxe3 28.
Qxe3 Rd8 29.fxe5 Rxd3 30.Qf2 Rd2 31.Qf1 Rxa2 32.e6 Qxe1 33.Qxe1 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Piasetski, Leon David"]
[Black "De Villiers, Charles"]
[Result "1-0"]
[ECO "B95"]
[EventDate "1971.08.02"]
[PlyCount "87"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qf3 Bd7 8.O-O-O 
Nc6 9.Be2 Be7 10.Qg3 O-O 11.f4 Qc7 12.Rhf1 Kh8 13.Qh4 Ng8 14.Bxe7 Ncxe7 
15.f5 e5 16.Nf3 f6 17.g4 b5 18.Bd3 b4 19.Ne2 Bb5 20.Qf2 Rac8 21.Ng3 Rfd8 
22.g5 d5 23.gxf6 gxf6 24.Ne1 Bxd3 25.Nxd3 dxe4 26.Nxb4 a5 27.Na6 Qc4 28.
Rxd8 Rxd8 29.Nc5 Qxa2 30.c3 a4 31.Ngxe4 a3 32.bxa3 Qa1+ 33.Kc2 Qa2+ 34.Kc1
Qa1+ 35.Kc2 Qxa3 36.Rb1 Nd5 37.Qg3 Rc8 38.Nd6 Rf8 39.Ne6 Qa2+ 40.Rb2 Qa4+ 
41.Kd2 Qd7 42.Rb7 Qxb7 43.Nxb7 Rb8 44.Qg7# 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Wach, Slawomir"]
[Black "Herzog, Adolf"]
[Result "1-0"]
[BlackElo "2400"]
[ECO "C05"]
[EventDate "1971.08.02"]
[PlyCount "55"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 f6 8.g3 cxd4 
9.cxd4 Bb4+ 10.Kf2 O-O 11.Kg2 fxe5 12.fxe5 Ne7 13.a3 Ba5 14.Bd3 Nf5 15.h4 
Bb6 16.Ne2 Nb8 17.g4 Ne7 18.Bc2 Nbc6 19.Qd3 Ng6 20.Bg5 Qc7 21.h5 Rxf3 22.
Qxf3 Nxd4 23.Nxd4 Bxd4 24.Bxg6 hxg6 25.Raf1 Qc2+ 26.Kh3 Bxe5 27.Qf7+ Kh8 
28.hxg6 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Leow, Leslie"]
[Result "0-1"]
[ECO "C00"]
[EventDate "1971.08.02"]
[PlyCount "84"]

1.e4 e6 2.b3 d5 3.Bb2 dxe4 4.Nc3 Nf6 5.Qe2 Nc6 6.Nxe4 Be7 7.Nf3 b6 8.g3 
Bb7 9.Bg2 Nb4 10.Nxf6+ Bxf6 11.d4 c5 12.O-O O-O 13.Rfd1 Qc7 14.a3 Nc6 15.
c4 Na5 16.Rd3 Rad8 17.Rad1 Bxf3 18.Qxf3 cxd4 19.Bxd4 Bxd4 20.Rxd4 Rxd4 21.
Rxd4 Qc5 22.Rd7 Qxa3 23.Rxa7 Qxb3 24.c5 Qc2 25.Qh5 Qc1+ 26.Bf1 g6 27.Qe5 
Nc6 28.Qa1 Qxc5 29.Rc7 Qd6 30.Rb7 Rb8 31.Rxb8+ Qxb8 32.h4 h5 33.Bg2 Ne7 
34.Qf6 Nf5 35.Be4 b5 36.g4 Ng7 37.Bf3 hxg4 38.Bxg4 b4 39.Bd1 Qd6 40.Bc2 
Qd2 41.Bb3 Nf5 42.Kg2 Qd4 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Cox, David"]
[Black "Biriescu, Ioan"]
[Result "1/2-1/2"]
[ECO "C77"]
[EventDate "1971.08.02"]
[PlyCount "25"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 b5 6.Bb3 Be7 7.c3 O-O 8.Nbd2 d5 
9.O-O dxe4 10.dxe4 Bg4 11.h3 Bh5 12.Qe2 Bd6 13.Rd1 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "De Villiers, Charles"]
[Black "Dieks, Roy"]
[Result "1/2-1/2"]
[ECO "B96"]
[EventDate "1971.08.02"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 h6 8.Bh4 Qb6 
9.Qd3 Qxb2 10.Rb1 Qa3 11.e5 dxe5 12.fxe5 Nd5 13.Nxd5 exd5 14.e6 Qxd3 15.
exf7+ Kxf7 16.Bxd3 Nd7 17.Bf5 Bc5 18.Be6+ Kg6 19.Bf5+ Kf7 20.Be6+ Ke8 21.
Nf5 g5 22.Bg3 Nb6 23.Bxc8 Rxc8 24.Bd6 Nc4 25.Bxc5 Rxc5 26.Rxb7 Rb5 27.Rxb5
axb5 28.Ke2 Kd7 29.Rb1 Kc6 30.Nd4+ Kc5 31.Nxb5 Re8+ 32.Kf2 Rf8+ 33.Ke2 
Re8+ 34.Kf2 Nd2 35.Rb2 Nc4 36.Rb3 Nd2 37.Rb2 Nc4 38.Rb3 Nd2 39.Rb2 Rf8+ 
40.Ke2 Nc4 41.Rb3 Re8+ 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Herzog, Adolf"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "0-1"]
[WhiteElo "2400"]
[ECO "B07"]
[EventDate "1971.08.02"]
[PlyCount "60"]

1.Nc3 Nf6 2.e4 d6 3.f4 g6 4.Nf3 Bg7 5.Bc4 c6 6.O-O O-O 7.d3 Nbd7 8.Qe1 Qc7
9.Kh1 Nh5 10.g4 d5 11.gxh5 dxc4 12.e5 cxd3 13.hxg6 fxg6 14.Ng5 c5 15.Nce4 
dxc2 16.Nxh7 Kxh7 17.Qh4+ Kg8 18.Ng5 Nf6 19.exf6 Rxf6 20.Bd2 Rf7 21.Qh7+ 
Kf8 22.Qxg6 Rf5 23.Bc3 Qc6+ 24.Qxc6 bxc6 25.Bxg7+ Kxg7 26.Rae1 e5 27.Rxe5 
Rxe5 28.fxe5 Bf5 29.Kg2 Rd8 30.e6 Rd1 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Ost-Hansen, Jacob"]
[Black "Piasetski, Leon David"]
[Result "1/2-1/2"]
[ECO "A20"]
[EventDate "1971.08.02"]
[PlyCount "115"]

1.g3 e5 2.c4 c6 3.Bg2 d5 4.Qa4 Nd7 5.d3 Ngf6 6.Nf3 Bd6 7.O-O O-O 8.cxd5 
cxd5 9.Nc3 a6 10.d4 e4 11.Ne1 h6 12.Nc2 b5 13.Qb3 Nb6 14.Ne3 Be6 15.a3 Qd7
16.f3 exf3 17.exf3 Nc4 18.f4 Bh3 19.Ncxd5 Nxd5 20.Bxh3 Qxh3 21.Nxd5 Rae8 
22.Qf3 Bb8 23.b3 Ba7 24.bxc4 Bxd4+ 25.Be3 Bxa1 26.Rxa1 bxc4 27.Bc5 Rb8 28.
Qg2 Qxg2+ 29.Kxg2 Rb2+ 30.Kf3 Rfb8 31.Rc1 R8b3+ 32.Ne3 c3 33.Bb4 a5 34.
Bxa5 Rxa3 35.Bxc3 Rxh2 36.Bd4 Rd2 37.Rc8+ Kh7 38.Rc4 h5 39.Ke4 f6 40.Rb4 
Rh2 41.Nf5 Re2+ 42.Ne3 Kg6 43.Rb6 Ra4 44.Rd6 Rd2 45.Rd7 Re2 46.Kf3 Rd2 47.
Ke4 Re2 48.Kd3 Rh2 49.f5+ Kh6 50.Nd5 Ra3+ 51.Ke4 Rxg3 52.Be3+ Rxe3+ 53.
Kxe3 g6 54.fxg6 Kxg6 55.Nf4+ Kg5 56.Kf3 Rh1 57.Rg7+ Kf5 58.Ng2 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Wach, Slawomir"]
[Black "Jamieson, Robert Murray"]
[Result "1/2-1/2"]
[ECO "C10"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 e6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Be7 5.Nf3 Nf6 6.Nxf6+ Bxf6 7.h4 c5 8.Bg5
cxd4 9.Bxf6 Qxf6 10.Qxd4 Qxd4 11.Nxd4 a6 12.O-O-O Bd7 13.g3 Nc6 14.Bg2 
O-O-O 15.Nb3 Kc7 16.Nc5 Bc8 17.Nd3 f6 18.Bxc6 Kxc6 19.f4 Rd6 20.Rhe1 Rhd8 
21.Re3 b6 22.a4 a5 23.b3 Kc7 24.Rde1 Kd7 25.Kd2 Ke7 26.c4 Bb7 27.Kc3 Be4 
28.Nf2 Bc6 29.R1e2 R8d7 30.Rd3 h6 31.Ree3 Rxd3+ 32.Nxd3 Kd6 33.g4 Re7 34.
Kd4 g5 35.hxg5 hxg5 36.fxg5 e5+ 37.Kc3 fxg5 38.Rh3 e4 39.Ne1 Bd7 40.Kd4 
Bxg4 41.Rg3 Bd1 42.Rxg5 Bxb3 43.c5+ bxc5+ 44.Rxc5 Bxa4 45.Rxa5 Bc6 46.Ra3 
1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Biriescu, Ioan"]
[Black "De Villiers, Charles"]
[Result "0-1"]
[ECO "B52"]
[EventDate "1971.08.02"]
[PlyCount "54"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Nxd7 5.c4 Ngf6 6.Nc3 g6 7.O-O Bg7 8.d4
cxd4 9.Nxd4 O-O 10.f3 Qa5 11.Nce2 Qc5 12.Be3 Qxc4 13.Qd2 Rfc8 14.Rfc1 Qa6 
15.b4 Ne5 16.b5 Qa3 17.Bf2 Nfd7 18.Nc3 Rc4 19.Rc2 Rac8 20.Rac1 Qb4 21.Nde2
Nb6 22.Kf1 Na4 23.a3 Qa5 24.Qe3 Nxc3 25.Nxc3 Qxa3 26.Qxa7 Qxa7 27.Bxa7 Nd3
0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Dieks, Roy"]
[Black "Ost-Hansen, Jacob"]
[Result "0-1"]
[ECO "D36"]
[EventDate "1971.08.02"]
[PlyCount "44"]

1.c4 e6 2.d4 Nf6 3.Nc3 d5 4.Bg5 Nbd7 5.e3 Be7 6.Nf3 O-O 7.cxd5 exd5 8.Bd3 
c6 9.Qc2 Re8 10.g4 Nf8 11.Bxf6 Bxf6 12.Rg1 c5 13.g5 Bxd4 14.Nxd4 cxd4 15.
Nb5 Qa5+ 16.Ke2 dxe3 17.Nc7 exf2+ 18.Kxf2 Qb6+ 19.Kg2 Qe3 20.Be2 Bh3+ 21.
Kh1 Rac8 22.Rge1 Qf2 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Jamieson, Robert Murray"]
[Black "Herzog, Adolf"]
[Result "1-0"]
[BlackElo "2400"]
[ECO "C00"]
[EventDate "1971.08.02"]
[PlyCount "111"]

1.e4 e6 2.d3 b6 3.Nf3 Bb7 4.g3 d5 5.Nbd2 dxe4 6.dxe4 Nf6 7.Qe2 Nc6 8.c3 
Be7 9.Bg2 Qd7 10.O-O O-O-O 11.Nc4 h5 12.Bg5 Qe8 13.a4 Nxe4 14.Qxe4 Bxg5 
15.Nxg5 Na5 16.Qe2 Bxg2 17.Nxb6+ axb6 18.Kxg2 Rd5 19.Nf3 Qc6 20.Kg1 Nb3 
21.Ra3 Na5 22.b4 Qc4 23.Qe1 Nc6 24.a5 bxa5 25.bxa5 Rhd8 26.a6 Rd1 27.Qxd1 
Rxd1 28.Rxd1 Qe2 29.Rc1 Qxf3 30.a7 Nxa7 31.Rxa7 h4 32.Raa1 h3 33.Kf1 Qg2+ 
34.Ke2 Qxh2 35.Rg1 f5 36.Kf3 e5 37.Raf1 g5 38.Ke3 g4 39.Rd1 f4+ 40.Ke2 f3+
41.Kf1 c5 42.Rd5 Kc7 43.c4 e4 44.Re5 Kb6 45.Rxe4 Ka5 46.Rxg4 Kb4 47.Rf4 
Kc3 48.Rxf3+ Kxc4 49.Re3 Kd4 50.Re1 c4 51.Rd1+ Ke4 52.Rd2 Kf5 53.Rc2 Kg6 
54.Rxc4 Kf6 55.Re4 Kg6 56.Re2 1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Leow, Leslie"]
[Black "Cox, David"]
[Result "1-0"]
[ECO "C87"]
[EventDate "1971.08.02"]
[PlyCount "81"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 Bg4 8.d3 Qd7 
9.Nbd2 g5 10.Nf1 Rg8 11.h3 Bh5 12.Ng3 g4 13.Nh2 O-O-O 14.Nxh5 Nxh5 15.hxg4
Nf4 16.Qf3 h5 17.Bxf4 hxg4 18.Qg3 exf4 19.Qxf4 Rg5 20.d4 Rh8 21.Nf1 f5 22.
d5 Bf6 23.dxc6 Qh7 24.Ng3 Qh4 25.exf5 Be5 26.Rxe5 dxe5 27.Qxe5 b5 28.Bb3 
Qh6 29.Be6+ Kb8 30.Rd1 Rg7 31.a4 Rgh7 32.Kf1 Qg7 33.Qxg7 Rxg7 34.axb5 axb5
35.Rd5 Ka7 36.Rd7 Rhh7 37.f6 Rxd7 38.cxd7 Rh8 39.Nf5 Kb8 40.Ng7 c5 41.Ne8 
1-0

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Piasetski, Leon David"]
[Black "Wach, Slawomir"]
[Result "1/2-1/2"]
[ECO "B31"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Nf6 5.Re1 a6 6.Bf1 d6 7.d4 cxd4 8.Nxd4 
Nxd4 9.Qxd4 Bg7 10.c4 O-O 11.Nc3 Be6 12.Qd3 Ng4 13.b3 b5 14.cxb5 Qb6 15.
Be3 Nxe3 16.Rxe3 axb5 17.Rd1 Bxc3 18.Qxc3 Rxa2 19.Qb4 Rb8 20.Rc1 Rb2 21.h3
Ra8 22.Qxb5 Qxb5 23.Bxb5 Raa2 24.Rf3 Rxb3 25.Rxb3 Bxb3 26.Bc4 Bxc4 27.Rxc4
Kg7 28.Rc7 Kf6 29.f3 h5 30.h4 Ke6 31.Kh2 f5 32.Kg3 fxe4 33.fxe4 Kf6 34.Kf3
Ra3+ 35.Kf2 e6 36.Rd7 Ke5 37.Rg7 Kf6 38.Rd7 Ra6 39.Kf3 Ra3+ 40.Kf2 Ke5 41.
Rg7 Kxe4 42.Rxg6 Ra2+ 43.Kg3 Ra3+ 44.Kf2 Ra2+ 45.Kg3 Ra3+ 46.Kf2 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[ECO "D82"]
[EventDate "1971.08.02"]
[PlyCount "95"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 c5 6.Nf3 cxd4 7.Nxd4 O-O 8.Rc1 a6
9.Be2 dxc4 10.Bxc4 b5 11.Qf3 Ra7 12.Be2 Bb7 13.Qg3 b4 14.Bxb8 Qxb8 15.Qxb8
Rxb8 16.Na4 Bxg2 17.Rg1 Bd5 18.Rg5 Bxa2 19.Nc6 Rc7 20.Rgc5 Ne4 21.Nxb8 
Nxc5 22.Rxc5 Rxc5 23.Nxc5 Bxb2 24.Nbxa6 g5 25.Kd1 Bc3 26.Kc2 Bd5 27.Nd3 
Be4 28.Nc5 Bg6 29.Kb3 h5 30.Nxb4 Be5 31.Nd5 Bd6 32.Nb7 Be4 33.Nxd6 Bxd5+ 
34.Bc4 Bxc4+ 35.Nxc4 Kg7 36.Kc3 Kf6 37.e4 g4 38.Kd3 Kg5 39.Ke3 Kh4 40.Kf4 
f6 41.Ne3 Kh3 42.Nd5 Kxh2 43.e5 fxe5+ 44.Kg5 g3 45.fxg3 Kxg3 46.Kxh5 Kf3 
47.Kg5 e6 48.Kf6 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Cox, David"]
[Black "Zabala Bilbao, Pedro Maria"]
[Result "1/2-1/2"]
[ECO "B71"]
[EventDate "1971.08.02"]
[PlyCount "111"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4 Nc6 7.Nxc6 bxc6 8.e5 
Nd7 9.exd6 exd6 10.Be3 Qe7 11.Qd4 Bg7 12.Qxg7 Qxe3+ 13.Be2 Rf8 14.Rf1 Ba6 
15.Rd1 Bxe2 16.Nxe2 O-O-O 17.Rf3 Qe6 18.Qc3 d5 19.Qa5 Rfe8 20.Rd2 Nb6 21.
Qxa7 c5 22.Rb3 Rd6 23.a4 c4 24.Rb5 Qe3 25.Kd1 Rde6 26.Kc1 R8e7 27.Qa6+ Kb8
28.Nd4 Kc7 29.a5 Qxd2+ 30.Kxd2 c3+ 31.Kxc3 Na4+ 32.Kb4 Rxa6 33.Kxa4 Kd6 
34.b4 Re4 35.c3 Rxf4 36.Rc5 Rf2 37.Kb5 Ra8 38.Kb6 Re8 39.a6 Ra2 40.a7 Rxg2
41.Nb5+ Ke5 42.Kb7 Rxh2 43.Rc8 Rxc8 44.Kxc8 Ra2 45.Kb7 h5 46.a8=Q Rxa8 47.
Kxa8 h4 48.Nd4 h3 49.b5 h2 50.Nf3+ Kd6 51.Nxh2 Kc5 52.Kb7 Kxb5 53.Kc7 Kc5 
54.Kd7 Kc4 55.Kd6 g5 56.Ke5 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "De Villiers, Charles"]
[Black "Leow, Leslie"]
[Result "0-1"]
[ECO "C02"]
[EventDate "1971.08.02"]
[PlyCount "82"]

1.e4 e6 2.d4 d5 3.e5 c5 4.dxc5 Nc6 5.Nf3 Bxc5 6.Bd3 f6 7.Bf4 fxe5 8.Nxe5 
Qf6 9.Qh5+ g6 10.Nxg6 hxg6 11.Qxg6+ Qxg6 12.Bxg6+ Kf8 13.h4 e5 14.Bg3 e4 
15.c4 Nce7 16.cxd5 Nxg6 17.Nd2 Bf5 18.Rc1 Rc8 19.Rxc5 Rxc5 20.Bd6+ Ke8 21.
Bxc5 b6 22.Bd4 Rxh4 23.O-O Kd7 24.g3 Rh7 25.Re1 Re7 26.Bc3 Ne5 27.Kg2 Nf6 
28.Rd1 Bg4 29.Re1 Nf3 30.Bxf6 Nxe1+ 31.Kf1 Nf3 32.Nxf3 exf3 33.Bxe7 Kxe7 
34.Ke1 Kd6 35.Kd2 Kxd5 36.Ke3 Kc4 37.Ke4 b5 38.Ke3 Kb4 39.Ke4 a5 40.Ke3 a4
41.Kd2 a3 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Herzog, Adolf"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[WhiteElo "2400"]
[ECO "A00"]
[EventDate "1971.08.02"]
[PlyCount "75"]

1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5 4.Bc4 Nc6 5.d3 Na5 6.Bxf7+ Kxf7 7.Qh5+ Ke6 8.
Nf3 Nc6 9.Nfg5+ Kd7 10.Nf7 Qe8 11.Bg5 g6 12.Qf3 Nd4 13.Nf6+ Nxf6 14.Qxf6 
Qe7 15.Nxe5+ Ke8 16.Qxh8 Qxg5 17.h4 Qf4 18.g3 Qf5 19.O-O-O Qxf2 20.Rd2 
Qxg3 21.Rf1 Bf5 22.Qf6 Bh6 23.Qf7+ Kd8 24.Qg8+ Ke7 25.Qxh7+ Ke6 26.Qxh6 
Qxe5 27.c3 Nc6 28.Rff2 Rh8 29.Qg5 Qf6 30.Qf4 Kd7 31.Rh2 Qd6 32.Qa4 Re8 33.
h5 Re1+ 34.Kc2 Kc8 35.hxg6 Bxd3+ 36.Rxd3 Qxh2+ 37.Kb3 Qg1 38.Qxa7 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Jamieson, Robert Murray"]
[Black "Piasetski, Leon David"]
[Result "0-1"]
[ECO "B07"]
[EventDate "1971.08.02"]
[PlyCount "100"]

1.e4 g6 2.d4 d6 3.Nc3 Bg7 4.Be3 Nf6 5.f3 c6 6.Qd2 b5 7.Bd3 Nbd7 8.Nge2 Bb7
9.O-O O-O 10.Rf2 a6 11.g4 e5 12.dxe5 dxe5 13.Ng3 Qe7 14.h4 Rfd8 15.h5 Ne8 
16.Raf1 Nc7 17.Nce2 Ne6 18.Rg2 Kh8 19.h6 Bf6 20.f4 exf4 21.Nxf4 Nxf4 22.
Bxf4 Bd4+ 23.Be3 Ne5 24.Bxd4 Rxd4 25.Qc3 c5 26.b4 Rxb4 27.Rxf7 Qxf7 28.
Qxe5+ Kg8 29.Nf5 Rb1+ 30.Kh2 Re8 31.Qxc5 Qf6 32.g5 Qe5+ 33.Qxe5 Rxe5 34.
Nd6 Bc6 35.c4 Rd1 36.Rg3 Rd2+ 37.Kg1 Rxa2 38.cxb5 axb5 39.Bf1 Rd2 40.Nc8 
Rd8 41.Na7 Be8 42.Rc3 Rxg5+ 43.Kf2 Rh5 44.Rc1 Rxh6 45.Nxb5 Bf7 46.e5 Rh5 
47.Nd6 Rxe5 48.Nxf7 Rf5+ 49.Kg3 Rxf7 50.Bc4 Rf8 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Ost-Hansen, Jacob"]
[Black "Biriescu, Ioan"]
[Result "0-1"]
[ECO "C26"]
[EventDate "1971.08.02"]
[PlyCount "86"]

1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5 4.d3 h6 5.f4 Nc6 6.Nf3 d6 7.Na4 Bb6 8.Nxb6 
axb6 9.a3 O-O 10.O-O exf4 11.Bxf4 Kh7 12.Qe2 Qe7 13.Ba2 Be6 14.Bxe6 Qxe6 
15.Rae1 Rae8 16.Qf2 Nd7 17.Bd2 d5 18.Qh4 Kg8 19.Bc3 dxe4 20.Rxe4 Qd6 21.
Rg4 Nde5 22.Rg3 Ng6 23.Qg4 Re6 24.Nh4 Nce7 25.Nf5 Nxf5 26.Rxf5 Rfe8 27.h4 
Qf8 28.h5 Ne5 29.Qf4 Qe7 30.d4 Nd7 31.d5 Re1+ 32.Bxe1 Qxe1+ 33.Kh2 Re4 34.
Qxc7 Ne5 35.Rxe5 Rxe5 36.Qc8+ Kh7 37.Rh3 Rxd5 38.Qc4 Qe5+ 39.Rg3 Qxh5+ 40.
Rh3 Qe5+ 41.Rg3 Rd4 42.Qc8 Rh4+ 43.Kg1 Qe1# 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Wach, Slawomir"]
[Black "Dieks, Roy"]
[Result "1/2-1/2"]
[ECO "B93"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 Nbd7 7.Nf3 Qc7 8.Bd3 
b5 9.a3 e6 10.O-O Be7 11.Qe1 O-O 12.Qg3 Nc5 13.e5 Nfd7 14.Be3 Bb7 15.exd6 
Qxd6 16.Rad1 Qc7 17.Ne5 Nxd3 18.Nxd7 Qxd7 19.Rxd3 Qc6 20.f5 exf5 21.Nd5 
Bc5 22.Rxf5 Kh8 23.Bxc5 Qxc5+ 24.Qf2 Rac8 25.Nc3 Qc6 26.Rdd5 Qg6 27.Rd3 
Rfe8 28.Rg3 Qh6 29.Rf4 Re1+ 30.Qxe1 Qxf4 31.Qe3 Qf6 32.Qg5 Qxg5 33.Rxg5 f6
34.Rg3 Kg8 35.Rd3 Bc6 36.g3 Kf7 37.Kf2 a5 38.Rd4 Ke6 39.Ke3 Ke5 40.Ne2 f5 
41.c3 g5 42.Rd2 Rb8 43.Rd4 Rc8 44.Rd2 Rb8 45.Nd4 Be4 46.Rf2 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Biriescu, Ioan"]
[Black "Wach, Slawomir"]
[Result "1/2-1/2"]
[ECO "B31"]
[EventDate "1971.08.02"]
[PlyCount "33"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Nf6 5.Re1 a6 6.Bf1 d6 7.h3 e5 8.c3 Bg7 9.
d4 cxd4 10.cxd4 O-O 11.Nc3 Nh5 12.Be3 Nf4 13.dxe5 dxe5 14.Qxd8 Rxd8 15.Bb6
Rd6 16.Bc5 Rd8 17.Bb6 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Cox, David"]
[Result "1/2-1/2"]
[ECO "B02"]
[EventDate "1971.08.02"]
[PlyCount "28"]

1.e4 Nf6 2.Nc3 d5 3.e5 d4 4.exf6 dxc3 5.fxg7 cxd2+ 6.Bxd2 Bxg7 7.Qc1 e5 8.
Bd3 O-O 9.Ne2 f5 10.Bh6 Be6 11.Bxg7 Kxg7 12.Qe3 Nd7 13.O-O Qf6 14.Rfe1 Kh8
1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Dieks, Roy"]
[Black "Jamieson, Robert Murray"]
[Result "0-1"]
[ECO "E99"]
[EventDate "1971.08.02"]
[PlyCount "92"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Nf3 d6 6.Be2 Nc6 7.O-O e5 8.d5 Ne7 
9.Ne1 Nd7 10.Nd3 f5 11.f3 f4 12.Bd2 g5 13.Rc1 Ng6 14.c5 dxc5 15.Na4 c4 16.
Ndc5 Nxc5 17.Nxc5 b6 18.Na4 b5 19.Nc3 a6 20.a3 c5 21.dxc6 Be6 22.Kh1 Ne7 
23.a4 Qb6 24.Nd5 Bxd5 25.exd5 Nxd5 26.b3 c3 27.Bxc3 Ne3 28.Qd3 Nxf1 29.
Bxf1 Qxc6 30.Bb2 Qb7 31.Qd6 Rfd8 32.Qe6+ Qf7 33.Qxf7+ Kxf7 34.axb5 axb5 
35.Bxb5 Rac8 36.Bc4+ Kf6 37.h3 Rd7 38.Re1 Kf5 39.Ra1 Rcd8 40.Ra5 h5 41.Ba3
Bf6 42.Ra6 Rd1+ 43.Kh2 Ra1 44.Be7 Rxa6 45.Bxd8 Rd6 46.Bc7 Rd1 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Leow, Leslie"]
[Black "Ost-Hansen, Jacob"]
[Result "1/2-1/2"]
[ECO "C95"]
[EventDate "1971.08.02"]
[PlyCount "46"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 
9.h3 Nb8 10.d4 Nbd7 11.c4 c6 12.c5 Qc7 13.cxd6 Bxd6 14.Bg5 exd4 15.Nxd4 
Re8 16.Nd2 Bb7 17.Nf5 Bh2+ 18.Kh1 Bf4 19.Nf3 Rf8 20.Bxf4 Qxf4 21.Ne7+ Kh8 
22.e5 Nd5 23.Nxd5 cxd5 1/2-1/2

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Piasetski, Leon David"]
[Black "Herzog, Adolf"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "C07"]
[EventDate "1971.08.02"]
[PlyCount "144"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 cxd4 5.Nxd4 Nf6 6.Bd3 Be7 7.O-O O-O 8.e5 
Nfd7 9.Re1 Nc6 10.N2f3 Nc5 11.c3 f6 12.exf6 Bxf6 13.Bc2 e5 14.Nxc6 bxc6 
15.Nxe5 Qb6 16.Qd4 Qc7 17.Qxc5 Bxe5 18.f4 Bd6 19.Qd4 Bxf4 20.Bxf4 Rxf4 21.
Re8+ Kf7 22.Qe3 Qb6 23.Re1 Qxe3+ 24.R1xe3 Ba6 25.R3e7+ Kf6 26.Re6+ Kf7 27.
R6e7+ Kf6 28.g3 Rf1+ 29.Kg2 Rxe8 30.Rxe8 Ra1 31.Bb3 Rb1 32.Ra8 Rxb2+ 33.
Kf3 Be2+ 34.Ke3 a6 35.h4 Bb5 36.Kd4 Rd2+ 37.Kc5 Rd3 38.a4 Bc4 39.Bxc4 Rxc3
40.Kxc6 Rxc4+ 41.Kxd5 Rxa4 42.Rf8+ Kg6 43.Ke5 a5 44.Ra8 Kh5 45.Rc8 Kg6 46.
Rc6+ Kh5 47.Kf5 Rg4 48.Rc3 a4 49.Rd3 h6 50.Rc3 Rb4 51.Rc5 g5 52.hxg5 hxg5 
53.Ra5 Rc4 54.Ra8 Rc5+ 55.Ke4 Rc3 56.Rxa4 Rxg3 57.Ra1 g4 58.Rh1+ Kg5 59.
Rf1 Kh4 60.Kf4 Rh3 61.Ke4 Rh2 62.Kf4 Kh3 63.Ke3 Ra2 64.Rf8 g3 65.Rh8+ Kg2 
66.Rg8 Rf2 67.Rg7 Rf8 68.Rg6 Kh2 69.Rh6+ Kg1 70.Ke2 g2 71.Rh7 Re8+ 72.Kf3 
Kf1 0-1

[Event "11th World U20 final B"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Zabala Bilbao, Pedro Maria"]
[Black "De Villiers, Charles"]
[Result "0-1"]
[ECO "A59"]
[EventDate "1971.08.02"]
[PlyCount "64"]

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 Bxf1 8.Kxf1 
g6 9.Nge2 Bg7 10.g3 Nbd7 11.Kg2 Qb6 12.Rb1 O-O 13.h4 Ne5 14.b3 Rfb8 15.Be3
Qb4 16.f3 h5 17.Qd2 Ne8 18.Bf4 Nc7 19.Rhd1 Nb5 20.Nxb5 Rxb5 21.Qc2 Qa3 22.
Nc3 Rb7 23.Na4 Nxf3 24.Bc1 Qb4 25.Kxf3 Rxa4 26.Bd2 Qa3 27.Bc3 Ra8 28.Bxg7 
Kxg7 29.Rd2 Rb4 30.Rc1 c4 31.Qc3+ Kh7 32.bxc4 Rxc4 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Buscio, Jorge"]
[Black "Bellin, Robert"]
[Result "0-1"]
[ECO "D76"]
[EventDate "1971.08.02"]
[PlyCount "26"]

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6 6.Nf3 Bg7 7.O-O O-O 8.d4 
Nc6 9.e3 e5 10.dxe5 Nxe5 11.e4 Bg4 12.Qe2 Qf6 13.Bg5 Nxf3+ 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Cappello, Renato"]
[Black "Cruz, Jorge"]
[Result "1-0"]
[ECO "B45"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Be2 d5 7.exd5 Nxd5 8.
Nxd5 exd5 9.O-O Be7 10.Be3 O-O 11.c3 Bf6 12.Qa4 Bd7 13.Qb3 Nxd4 14.Bxd4 
Bxd4 15.cxd4 Bc6 16.Bf3 Qd6 17.Rfe1 Rfe8 18.Qc3 Rac8 19.Rxe8+ Rxe8 20.Re1 
Rxe1+ 21.Qxe1 Qe6 22.Qxe6 fxe6 23.Bh5 g6 24.Bg4 Kf7 25.f4 Kf6 26.Kf2 Bd7 
27.Ke3 h6 28.h4 Be8 29.Kd2 Ke7 30.Kc3 Kd6 31.Bd1 Bd7 32.h5 Be8 33.hxg6 
Bxg6 34.g4 Ke7 35.Kb4 Kd6 36.a4 Be4 37.a5 Bg6 38.Be2 Be4 39.Kc3 Bg6 40.Bd3
Be8 41.g5 hxg5 42.fxg5 e5 43.dxe5+ Kxe5 44.g6 d4+ 45.Kc4 Bd7 46.Kc5 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Roofthoofd, Marcel"]
[Black "Haigh, Geoff"]
[Result "0-1"]
[ECO "B72"]
[EventDate "1971.08.02"]
[PlyCount "36"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.Be3 Nc6 8.Qd2 
O-O 9.h4 Qa5 10.h5 Nxd4 11.Bxd4 Nxe4 12.Qe3 e5 13.Qxe4 exd4 14.Qd5 Qb6 15.
hxg6 hxg6 16.Nb5 Re8 17.Qc4 Bg4 18.f3 Rac8 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Rosenberg, Michael"]
[Black "Lev, Arieh"]
[Result "0-1"]
[ECO "B79"]
[EventDate "1971.08.02"]
[PlyCount "62"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Bd7 7.Bb3 g6 8.f3 
Bg7 9.Be3 O-O 10.Qd2 Qa5 11.O-O-O Rfc8 12.h4 h5 13.Rdg1 Ne5 14.Kb1 b5 15.
Ncxb5 Qa6 16.a4 Rab8 17.Bh6 Nc4 18.Bxc4 Rxc4 19.b3 Bxh6 20.Qxh6 Rxa4 21.
bxa4 Qxa4 22.Qe3 Bxb5 23.Nxb5 Rxb5+ 24.Kc1 Rc5 25.Qd3 Nd7 26.Kd1 Ne5 27.
Qb3 Qd4+ 28.Kc1 Ra5 29.c3 Qe3+ 30.Kb1 Qd3+ 31.Kc1 Nc4 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Shirazi, Kamran"]
[Black "Vassiades, Constantinos"]
[Result "1-0"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "53"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.c4 Nf6 8.Nc3
g6 9.Bg5 Bg7 10.O-O h6 11.Bh4 O-O 12.Qe3 Kh7 13.h3 Qc8 14.Rfe1 Re8 15.Rac1
Bd7 16.b3 Qc5 17.Qd2 Qh5 18.e5 Ng8 19.Ne4 g5 20.Bxg5 Bxh3 21.Ng3 Qg6 22.
gxh3 hxg5 23.Nxg5+ Kh8 24.e6 f6 25.Nf7+ Kh7 26.Re4 f5 27.Kh1 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Weber, Leon"]
[Black "Kaiszauri, Konstanty"]
[Result "0-1"]
[ECO "A67"]
[EventDate "1971.08.02"]
[PlyCount "92"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+ Nfd7
9.Bd3 O-O 10.Nf3 Na6 11.O-O Nc7 12.a4 b6 13.Nb5 Nf6 14.h3 a6 15.Nc3 Rb8 
16.Nd2 b5 17.axb5 axb5 18.Qf3 c4 19.Bc2 Nd7 20.Ne2 Na6 21.Ng3 Nb4 22.Bb1 
Nc5 23.f5 Bd4+ 24.Kh1 Qh4 25.Ne2 Be5 26.fxg6 hxg6 27.Ra7 Bd7 28.b3 g5 29.
Rxd7 Nxd7 30.Qf5 Rb7 31.Nf3 Qh7 32.Qxg5+ Qg6 33.Qd2 Nd3 34.Bxd3 cxd3 35.
Nf4 Qxe4 36.Ng5 Qf5 37.h4 Qg4 38.Qxd3 Qxh4+ 39.Nfh3 Nc5 40.Qf5 f6 41.b4 
Qxb4 42.Be3 Qh4 43.Bxc5 dxc5 44.Ne6 Qg3 45.Kg1 Bd4+ 46.Nf2 Rh7 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Lev, Arieh"]
[Black "Roofthoofd, Marcel"]
[Result "0-1"]
[ECO "B09"]
[EventDate "1971.08.02"]
[PlyCount "100"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 c5 6.d5 O-O 7.Be2 e6 8.O-O exd5 
9.exd5 Re8 10.Nd2 Na6 11.Nc4 Nc7 12.a4 Nfxd5 13.Nxd5 Nxd5 14.Bf3 Nb6 15.
Nxb6 axb6 16.c3 Qc7 17.Bd5 b5 18.Bd2 bxa4 19.Rxa4 Rxa4 20.Qxa4 Bd7 21.Qb3 
Bc6 22.Re1 Rxe1+ 23.Bxe1 b5 24.Bf2 Qb7 25.Bxc6 Qxc6 26.Qc2 Qd5 27.h3 Qc4 
28.Qd2 Qe6 29.Qd3 b4 30.cxb4 cxb4 31.Qb5 Bxb2 32.Qxb4 Bf6 33.Bd4 Bxd4+ 34.
Qxd4 d5 35.Kf2 Qe4 36.Qd2 Kg7 37.g3 h5 38.h4 d4 39.Qc1 Kf6 40.Qc5 Qe3+ 41.
Kg2 Kg7 42.f5 Qe4+ 43.Kg1 gxf5 44.Qa5 d3 45.Qc3+ Kh7 46.Qb3 Qd4+ 47.Kh2 
Kg7 48.Kg2 d2 49.Qd1 Kg6 50.Kf1 Qe3 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Bellin, Robert"]
[Black "Rosenberg, Michael"]
[Result "1/2-1/2"]
[ECO "A16"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 c6 6.d3 Bg7 7.Bd2 O-O 8.Nf3 e5
9.O-O h6 10.a3 Be6 11.Na4 Na6 12.Qc1 Kh7 13.Nc5 Nxc5 14.Qxc5 Qd7 15.e4 b6 
16.Qc2 Ne7 17.Bc3 Qd6 18.b4 c5 19.Rac1 Rfc8 20.bxc5 bxc5 21.Bd2 c4 22.Bb4 
Qd7 23.dxc4 Rxc4 24.Qd2 Qxd2 25.Nxd2 Rd4 26.Nf3 Rd7 27.Rc5 f6 28.Rfc1 Rc8 
29.Rxc8 Nxc8 30.Bf1 Nb6 31.Bb5 Rb7 32.Ba6 Rd7 33.Bb5 Rb7 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Cappello, Renato"]
[Black "Shirazi, Kamran"]
[Result "1-0"]
[ECO "C26"]
[EventDate "1971.08.02"]
[PlyCount "35"]

1.e4 e5 2.Nf3 Nf6 3.Nc3 Bb4 4.Bc4 d6 5.d3 Nc6 6.a3 Bxc3+ 7.bxc3 h6 8.Rb1 
O-O 9.O-O b6 10.Ne1 d5 11.exd5 Nxd5 12.Bd2 Bb7 13.Qh5 Nf6 14.Qh3 Kh8 15.f4
Ne4 16.dxe4 Qxd2 17.Bd5 Na5 18.Rf2 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Cruz, Jorge"]
[Black "Haigh, Geoff"]
[Result "1/2-1/2"]
[ECO "E01"]
[EventDate "1971.08.02"]
[PlyCount "70"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c6 5.c5 b6 6.cxb6 axb6 7.Nf3 Bd6 8.Nc3 O-O 
9.O-O Nfd7 10.e4 Bb4 11.a3 h6 12.exd5 cxd5 13.Bf4 Bxc3 14.bxc3 Qe7 15.Qb3 
Nc6 16.Rfe1 Bb7 17.Nd2 Ra5 18.Bc7 Rfa8 19.a4 R5a7 20.Bxb6 Nxb6 21.Qxb6 Na5
22.Bf1 Bc6 23.Qb2 Rb7 24.Qc2 Qd7 25.Bd3 Rba7 26.Reb1 Nb7 27.Rb4 Rxa4 28.
Raxa4 Rxa4 29.Qb2 g6 30.Rb6 Nd6 31.Nb3 Nc4 32.Bxc4 dxc4 33.Nc5 Qd5 34.Rxc6
Qxc6 35.Nxa4 Qxa4 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Kaiszauri, Konstanty"]
[Black "Buscio, Jorge"]
[Result "1-0"]
[ECO "C12"]
[EventDate "1971.08.02"]
[PlyCount "135"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6
9.h4 c5 10.Bd3 Nxd2 11.Kxd2 cxd4 12.cxd4 Nc6 13.Rh3 Qb6 14.Ne2 Bd7 15.Rf3 
Nb4 16.Rxf7 Nxd3 17.Qxg6 Nxe5 18.dxe5 O-O-O 19.Qd3 Rdf8 20.Rxf8+ Rxf8 21.
f4 Qf2 22.g3 a6 23.Qd4 Qxd4+ 24.Nxd4 Rg8 25.Rg1 h5 26.Ke3 b5 27.Kf3 Rg4 
28.Nb3 Kc7 29.Nc5 Bc8 30.Nd3 Kb6 31.Nf2 Rg8 32.g4 Ka5 33.Rg3 hxg4+ 34.Nxg4
Kb4 35.Nf6 Rh8 36.Kg4 Bb7 37.h5 d4 38.Kg5 Bd5 39.Kg6 Bxa2 40.Kg7 Rc8 41.h6
Rc7+ 42.Kf8 Rc8+ 43.Ke7 Rc7+ 44.Kd6 Rxc2 45.h7 Rh2 46.Rg8 d3 47.h8=Q Rxh8 
48.Rxh8 d2 49.Rh1 Bb3 50.f5 d1=Q+ 51.Rxd1 Bxd1 52.fxe6 Bc2 53.Nd5+ Ka3 54.
e7 Bg6 55.Kd7 b4 56.Nf4 b3 57.Nxg6 b2 58.e8=Q b1=Q 59.Qf8+ Ka4 60.Qf4+ Kb5
61.Ne7 Qd3+ 62.Kc7 a5 63.e6 Qc3+ 64.Kd7 Qd3+ 65.Qd6 Qh3 66.Qc6+ Kb4 67.
Nd5+ Ka3 68.Qc3+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "2"]
[White "Vassiades, Constantinos"]
[Black "Weber, Leon"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1971.08.02"]
[PlyCount "46"]

1.Nf3 d5 2.g3 Nf6 3.Bg2 c6 4.O-O Bf5 5.d4 h6 6.Nbd2 Nbd7 7.c4 e6 8.b3 Bd6 
9.Bb2 O-O 10.Ne5 Qc7 11.f4 Ng4 12.Nxg4 Bxg4 13.Qe1 f5 14.e3 Nf6 15.Rf2 Qe7
16.h3 Bh5 17.c5 Bc7 18.Rc1 g5 19.Nf1 Ne4 20.Bxe4 fxe4 21.Kh2 Kh7 22.Rcc2 
gxf4 23.gxf4 Qh4 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Buscio, Jorge"]
[Black "Vassiades, Constantinos"]
[Result "1-0"]
[ECO "B26"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 e6 6.Be3 d6 7.Qd2 Qa5 8.f4 Nge7 
9.Nf3 O-O 10.h4 d5 11.exd5 exd5 12.Bf2 Re8 13.O-O Bf5 14.Rfe1 Rad8 15.a3 
h6 16.Nh2 h5 17.Re2 Nd4 18.Ree1 Be6 19.Nf3 Nef5 20.Ne5 a6 21.Rad1 Qc7 22.
Ne2 Nxe2+ 23.Rxe2 b5 24.Rde1 Bxe5 25.Rxe5 c4 26.Bxd5 Rxd5 27.Rxd5 Bxd5 28.
Rxe8+ Kh7 29.Qc3 Ng7 30.Re5 Qd7 31.Qd4 Bc6 32.Qxd7 Bxd7 33.dxc4 bxc4 34.
Re7 Be6 35.Ra7 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Haigh, Geoff"]
[Black "Lev, Arieh"]
[Result "0-1"]
[ECO "E46"]
[EventDate "1971.08.02"]
[PlyCount "92"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bxc3+ 7.Nxc3 Nbd7 8.cxd5
exd5 9.Qc2 Re8 10.Bd3 Nf8 11.O-O c6 12.b4 Qd6 13.h3 Ne6 14.f4 b6 15.Bd2 
Bb7 16.Rab1 Qe7 17.Rfc1 Rec8 18.Rb2 Rc7 19.Qd1 Rac8 20.Qf3 Rd7 21.Ne2 c5 
22.Rf1 Ne4 23.bxc5 bxc5 24.Ba5 c4 25.Bxe4 dxe4 26.Qg4 Qxa3 27.Bc3 Bd5 28.
f5 Nf8 29.Rfb1 f6 30.Qg3 Qd6 31.Nf4 g5 32.Qg4 Kh8 33.Bb4 Qc6 34.Nxd5 Qxd5 
35.Qh5 Qxf5 36.Qh6 Ne6 37.Bc3 Qg6 38.Qxg6 hxg6 39.d5 Rxd5 40.Bxf6+ Kg8 41.
Rb7 Rc7 42.Rxc7 Nxc7 43.Rb7 Nb5 44.Rg7+ Kf8 45.Rxg6 c3 46.Rxg5 Rxg5 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Roofthoofd, Marcel"]
[Black "Bellin, Robert"]
[Result "1/2-1/2"]
[ECO "B57"]
[EventDate "1971.08.02"]
[PlyCount "38"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Bd7 7.Bb3 g6 8.Be3 
Ng4 9.Nxc6 bxc6 10.Bg5 Bg7 11.h3 Nf6 12.O-O O-O 13.Qd2 a5 14.Bh6 a4 15.
Bxg7 Kxg7 16.e5 axb3 17.exf6+ exf6 18.axb3 Qc7 19.Ne4 Bf5 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Rosenberg, Michael"]
[Black "Kaiszauri, Konstanty"]
[Result "1/2-1/2"]
[ECO "C78"]
[EventDate "1971.08.02"]
[PlyCount "120"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Re1 Bc5 8.c3 d6 
9.d4 Bb6 10.Bg5 h6 11.Bh4 O-O 12.dxe5 Nxe5 13.Nxe5 dxe5 14.Nd2 Qd6 15.Qe2 
Rad8 16.Red1 Qd3 17.Qe1 g5 18.Bg3 Ng4 19.Rac1 Ne3 20.fxe3 Bxe3+ 21.Kh1 
Bxd2 22.Qf2 Qe3 23.Bxf7+ Rxf7 24.Qxe3 Bxe3 25.Rxd8+ Kh7 26.Rcd1 Bxe4 27.
R1d7 Rxd7 28.Rxd7+ Kg6 29.Bxe5 c6 30.Bd4 Bc1 31.b4 Bd5 32.Kg1 Kf5 33.Kf2 
h5 34.a3 Bxa3 35.Be3 Ke4 36.Bxg5 Kd3 37.Bf6 Bb2 38.Rg7 Kc4 39.Rg3 c5 40.
bxc5 Kxc5 41.Rg5 a5 42.Rxh5 a4 43.Rh4 a3 44.Be7+ Kc6 45.Bxa3 Bxa3 46.g4 
Be7 47.Rh7 Bd6 48.Ke3 Be5 49.Kd3 Ba2 50.Kc2 Kd5 51.g5 Ke6 52.h4 Bd5 53.
Rh6+ Kf5 54.Rb6 Bc4 55.g6 Bg7 56.h5 Kg5 57.Rb7 Kh6 58.Kd2 Bf1 59.Ke1 Bc4 
60.Kd2 Bf1 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Shirazi, Kamran"]
[Black "Cruz, Jorge"]
[Result "1/2-1/2"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "62"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.c4 Nf6 8.Nc3
e6 9.Bg5 Be7 10.O-O O-O 11.h3 a6 12.Qd3 Qc7 13.Rfd1 Rfd8 14.Rac1 Qd7 15.
Nd4 Bxe4 16.Nxe4 Nxe4 17.Bxe7 Nc5 18.Qe3 Qxe7 19.b4 Na4 20.Qb3 Nb6 21.c5 
Nd5 22.Nf5 exf5 23.Rxd5 dxc5 24.Rdxc5 g6 25.a4 Rd7 26.b5 Rad8 27.b6 Rd1+ 
28.Rxd1 Rxd1+ 29.Qxd1 Qxc5 30.Qd8+ Kg7 31.Qc7 Qd5 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "3"]
[White "Weber, Leon"]
[Black "Cappello, Renato"]
[Result "1/2-1/2"]
[ECO "E17"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Bg5 h6 8.Be3 d5 
9.Nbd2 c5 10.Rc1 Nbd7 11.cxd5 Nxd5 12.Qb3 Nxe3 13.Qxe3 Rc8 14.Nc4 Bxf3 15.
exf3 b5 16.Ne5 Bf6 17.Qc3 b4 18.Qe1 cxd4 19.Rxc8 Qxc8 20.Nxd7 Qxd7 21.Qxb4
Rc8 22.Rd1 Rc2 23.Qb3 Qc7 24.f4 g6 25.Be4 d3 26.Qxd3 Rxb2 27.Rd2 Qc1+ 28.
Rd1 Qc5 29.Rd2 Qc1+ 30.Rd1 Qc5 31.Rd2 Kg7 32.Rxb2 Bxb2 33.Qc2 Qd4 34.a4 
Ba3 35.Kg2 Bc5 36.h4 a5 37.Bc6 f5 38.Qe2 Kf6 39.Qe5+ Qxe5 40.fxe5+ Kxe5 
41.f4+ Kf6 42.Bd7 e5 43.fxe5+ Kxe5 44.Kf3 Bb4 45.g4 fxg4+ 46.Kxg4 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Bellin, Robert"]
[Black "Haigh, Geoff"]
[Result "0-1"]
[ECO "B35"]
[EventDate "1971.08.02"]
[PlyCount "170"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Bc4 Bg7 7.h3 Nc6 8.Be3 
Qa5 9.O-O Bd7 10.Bb3 O-O 11.f4 Rac8 12.Nf3 Qh5 13.Qe1 b5 14.a3 a5 15.Rd1 
b4 16.Nd5 Nxe4 17.Nb6 Bxb2 18.Nxd7 Bc3 19.Qh4 bxa3 20.Qxh5 gxh5 21.Nd2 
Nxd2 22.Rxd2 Bxd2 23.Bxd2 Rfd8 24.Nb6 Rb8 25.Nc4 Ra8 26.Ba4 Nd4 27.Nxa3 
Rdc8 28.Re1 e6 29.Re4 Nf5 30.Bb5 d5 31.Ra4 Nd6 32.Bd3 Rc5 33.Bb4 Rc6 34.
Rxa5 Rxa5 35.Bxa5 Nb7 36.Bb4 Nc5 37.Bb5 Rc8 38.Kf2 Ne4+ 39.Ke1 Kg7 40.Bd3 
Nc5 41.Be2 Ne4 42.Nb1 Rxc2 43.Kd1 Rb2 44.Bc3+ Nxc3+ 45.Nxc3 Rb4 46.f5 h4 
47.fxe6 fxe6 48.Bf3 Kf6 49.Kc2 Ke5 50.Kd3 Kd6 51.Kc2 h6 52.Kc1 Kc5 53.Kc2 
Rd4 54.Bg4 e5 55.Be6 Kc4 56.Bc8 Kc5 57.Ba6 Rf4 58.Bb7 Rc4 59.Kd2 Rb4 60.
Bc8 Rb2+ 61.Kc1 Rb4 62.Kd2 Rd4+ 63.Kc2 Rc4 64.Ba6 Rb4 65.Bc8 Kd6 66.Bg4 e4
67.Ne2 Ke5 68.Kc3 Rb7 69.g3 d4+ 70.Nxd4 Rc7+ 71.Kd2 Kxd4 72.gxh4 Ra7 73.
Be6 Ra6 74.Bf7 Rf6 75.Bh5 Rf2+ 76.Ke1 Rb2 77.Bg4 Ke3 78.Kd1 Rb1+ 79.Kc2 
Re1 80.h5 Kf2 81.h4 e3 82.Kd3 e2 83.Kd2 Rd1+ 84.Kc2 Rd4 85.Bxe2 Kxe2 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Cappello, Renato"]
[Black "Buscio, Jorge"]
[Result "1/2-1/2"]
[ECO "C07"]
[EventDate "1971.08.02"]
[PlyCount "36"]

1.e4 e6 2.d4 d5 3.Nd2 a6 4.Ngf3 c5 5.dxc5 Bxc5 6.Bd3 Nc6 7.c3 Nf6 8.Qe2 
O-O 9.O-O b5 10.Nb3 dxe4 11.Bxe4 Nxe4 12.Qxe4 Qb6 13.Nxc5 Qxc5 14.Be3 Qd5 
15.Qxd5 exd5 16.Rfd1 Rd8 17.Bb6 Rd7 18.Re1 f6 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Cruz, Jorge"]
[Black "Lev, Arieh"]
[Result "1/2-1/2"]
[ECO "E30"]
[EventDate "1971.08.02"]
[PlyCount "58"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 c5 5.a3 Bxc3+ 6.bxc3 Qa5 7.Bd2 Ne4 8.Nf3 
b6 9.e3 Bb7 10.Bd3 d6 11.Qc2 Nxd2 12.Nxd2 cxd4 13.cxd4 Qg5 14.Be4 d5 15.f4
Qh4+ 16.g3 Qe7 17.Bg2 O-O 18.O-O Rc8 19.Qb3 Nc6 20.Rfc1 Na5 21.Qb4 Qd8 22.
c5 Ba6 23.Bf1 Bxf1 24.Kxf1 Rab8 25.cxb6 Qxb6 26.Qxb6 axb6 27.Rab1 Rxc1+ 
28.Rxc1 Kf8 29.Ke2 Rb7 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Kaiszauri, Konstanty"]
[Black "Roofthoofd, Marcel"]
[Result "1/2-1/2"]
[ECO "B35"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Bc4 Bg7 7.Be3 Ng4 8.Qxg4
Nxd4 9.Qd1 Ne6 10.Qd2 Qc7 11.Bb3 O-O 12.h4 h5 13.Bh6 d6 14.Nd5 Qd8 15.
O-O-O Nc7 16.f3 Nxd5 17.Bxd5 a5 18.g4 e6 19.Bc4 b5 20.Bxb5 Rb8 21.Bxg7 
Kxg7 22.a4 hxg4 23.fxg4 Bd7 24.Qxd6 Bxb5 25.Qxd8 Rfxd8 26.Rxd8 Rxd8 27.
axb5 Rd4 28.Rh3 Rxe4 29.b3 Rb4 30.c4 a4 31.Kb2 axb3 32.Rxb3 Rxc4 33.b6 Rc8
34.b7 Rb8 35.Kc3 g5 36.h5 f5 37.gxf5 exf5 38.Rb6 f4 39.Kd3 g4 40.Ke4 f3 
41.Ke3 Kh7 42.Kf2 Kg7 43.Kg3 Kh7 44.Kf2 Kg7 45.Kg3 Kh7 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Shirazi, Kamran"]
[Black "Weber, Leon"]
[Result "0-1"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "88"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qa5+ 6.Nc3 a6 7.b4 Qc7 8.Nd5 
Qd8 9.Bxc6+ bxc6 10.Ne3 e5 11.Qd3 Nf6 12.O-O Be7 13.c4 O-O 14.h3 Qc7 15.
Bb2 Rd8 16.a3 Nh5 17.Rfc1 Nf4 18.Qf1 f6 19.Rab1 Qb7 20.a4 d5 21.exd5 cxd5 
22.c5 d4 23.c6 Qc7 24.Nxd4 exd4 25.Bxd4 Rxd4 26.b5 axb5 27.axb5 Rb8 28.Rc4
Rxc4 29.Qxc4+ Be6 30.Qe4 Bf7 31.b6 Rxb6 32.Rxb6 Qxb6 33.Nf5 Bf8 34.Qxf4 
Qxc6 35.Qb8 Qe8 36.Qg3 Bg6 37.Nh4 Kh8 38.Qg4 Bh5 39.Qc4 Qe1+ 40.Qf1 Qxf1+ 
41.Kxf1 g5 42.Nf5 Bg6 43.Nd4 Bb4 44.f4 Bd3+ 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.05"]
[Round "4"]
[White "Vassiades, Constantinos"]
[Black "Rosenberg, Michael"]
[Result "0-1"]
[ECO "B26"]
[EventDate "1971.08.02"]
[PlyCount "68"]

1.e4 e6 2.d3 c5 3.Nc3 Nc6 4.g3 g6 5.Bg2 Bg7 6.Be3 d6 7.Qd2 Nge7 8.Nf3 Rb8 
9.O-O O-O 10.Bh6 Qc7 11.Bxg7 Kxg7 12.Nd1 Nd4 13.Ne3 Bd7 14.Nh4 b5 15.c3 
Ndc6 16.f4 f5 17.g4 b4 18.Bh3 Kh8 19.Rf2 d5 20.e5 a5 21.Rf3 a4 22.gxf5 
gxf5 23.Bg2 a3 24.c4 dxc4 25.Nxc4 axb2 26.Nxb2 Nd4 27.Rh3 b3 28.Nc4 Rg8 
29.Rf1 Bc6 30.axb3 Ng6 31.Nxg6+ Rxg6 32.Rg3 Rbg8 33.Kf2 Rxg3 34.hxg3 Qg7 {
time} 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Lev, Arieh"]
[Black "Bellin, Robert"]
[Result "1/2-1/2"]
[ECO "C86"]
[EventDate "1971.08.02"]
[PlyCount "78"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2 b5 6.Bb3 Be7 7.O-O O-O 8.c3 d5 
9.exd5 Nxd5 10.Nxe5 Nf4 11.Qe4 Nxe5 12.d4 Neg6 13.Bxf4 Nxf4 14.Qxa8 Bd6 
15.Qf3 Qh4 16.g3 Qh3 17.Bd1 Bg4 18.Qc6 Bd7 19.Qh1 Re8 20.Nd2 Qh6 21.gxf4 
Qxf4 22.Bb3 Bh3 23.Bd5 Qg5+ 24.Bg2 Bxg2 25.Qxg2 Qxd2 26.Rad1 Qxb2 27.Rfe1 
Rf8 28.Qc6 Qxa2 29.Re8 g6 30.Rde1 Rxe8 31.Rxe8+ Kg7 32.Ra8 Qb1+ 33.Kg2 Qf5
34.Qf3 Qg5+ 35.Kf1 Qc1+ 36.Kg2 Qg5+ 37.Kf1 Qc1+ 38.Ke2 Qc2+ 39.Kf1 Qc1+ 
1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Buscio, Jorge"]
[Black "Shirazi, Kamran"]
[Result "0-1"]
[ECO "C44"]
[EventDate "1971.08.02"]
[PlyCount "86"]

1.e4 e5 2.Nf3 Nf6 3.d3 Nc6 4.Nbd2 Bc5 5.Nb3 Bb6 6.Be3 d5 7.Be2 Bxe3 8.fxe3
dxe4 9.dxe4 Qxd1+ 10.Rxd1 Nxe4 11.O-O a6 12.Bd3 Nd6 13.Nc5 f5 14.Ng5 Ke7 
15.e4 h6 16.Nh3 b6 17.Nb3 fxe4 18.Be2 a5 19.c4 a4 20.Nd2 Nd4 21.Rde1 a3 
22.b3 Nc2 23.Rc1 Nd4 24.Rfe1 c5 25.Bf1 Bxh3 26.gxh3 Rhf8 27.Bg2 Rf4 28.
Nxe4 Nxe4 29.Bxe4 Rc8 30.Rc3 Rcf8 31.Bd5 Rf1+ 32.Rxf1 Ne2+ 33.Kg2 Nxc3 34.
Rc1 Nxd5 35.cxd5 Kd6 36.Rd1 b5 37.Rd3 b4 38.Rg3 Rf7 39.Rd3 e4 40.Rd1 e3 
41.Re1 Rf2+ 42.Kg3 Rxa2 43.Rxe3 Rb2 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Haigh, Geoff"]
[Black "Kaiszauri, Konstanty"]
[Result "0-1"]
[ECO "E67"]
[EventDate "1971.08.02"]
[PlyCount "88"]

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.c4 Nbd7 7.Nc3 e5 8.dxe5 
dxe5 9.Qc2 c6 10.e4 Nh5 11.Be3 f5 12.Rad1 Qe7 13.exf5 gxf5 14.Bg5 Qf7 15.
Bh4 Qxc4 16.Rd6 e4 17.Ng5 Ne5 18.Rfd1 Nd3 19.Bf1 h6 20.Nh3 f4 21.Qe2 f3 
22.Qe3 Bf5 23.g4 Bxg4 24.Nxe4 Bxh3 25.Bxh3 Rae8 26.R1xd3 Rxe4 27.Be6+ Rxe6
28.Qxe6+ Qxe6 29.Rxe6 Nf4 30.Rde3 Nxe6 31.Rxe6 Bxb2 32.Rxh6 Re8 33.h3 c5 
34.Rg6+ Kf7 35.Rg4 Re1+ 36.Kh2 Be5+ 37.Bg3 b5 38.Bxe5 Rxe5 39.Rf4+ Ke6 40.
Rxf3 c4 41.a3 a5 42.Kg1 b4 43.axb4 axb4 44.Rf8 Rb5 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Roofthoofd, Marcel"]
[Black "Vassiades, Constantinos"]
[Result "1-0"]
[ECO "B78"]
[EventDate "1971.08.02"]
[PlyCount "88"]

1.e4 c5 2.Ne2 d6 3.Nbc3 Nc6 4.d4 cxd4 5.Nxd4 g6 6.Be3 Bg7 7.Bc4 Nf6 8.f3 
O-O 9.Qd2 Bd7 10.Bb3 Qa5 11.O-O-O Rfc8 12.Kb1 Ne5 13.Qe2 Rab8 14.g4 b5 15.
g5 Nh5 16.Rhg1 Nc4 17.f4 e6 18.Qd3 Qb6 19.f5 Be5 20.fxe6 fxe6 21.Nxe6 Qxe3
22.Qxe3 Nxe3 23.Nc5+ Kg7 24.Nxd7 Nxd1 25.Rxd1 Rb7 26.Nxe5 dxe5 27.Rd5 Rf8 
28.a3 a6 29.Rxe5 h6 30.h4 Nf4 31.Nd5 Ng2 32.c4 Nxh4 33.cxb5 axb5 34.Ne3 
Nf3 35.gxh6+ Kxh6 36.Ng4+ Kg7 37.Rd5 Rf4 38.Ne5 Rxe4 39.Nxf3 Rf4 40.Nd4 
Kf6 41.Nxb5 g5 42.Rd6+ Kf5 43.Nd4+ Kg4 44.Bd1+ Kg3 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Rosenberg, Michael"]
[Black "Cappello, Renato"]
[Result "1/2-1/2"]
[ECO "C07"]
[EventDate "1971.08.02"]
[PlyCount "34"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 Nc6 5.c3 cxd4 6.cxd4 Nf6 7.e5 Nd7 8.Bd3 
Qb6 9.O-O Nxd4 10.Nxd4 Qxd4 11.Nf3 Qb6 12.Qa4 Qb4 13.Qc2 Qc5 14.Qa4 Qb4 
15.Qc2 Qc5 16.Bxh7 Qxc2 17.Bxc2 b6 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "5"]
[White "Weber, Leon"]
[Black "Cruz, Jorge"]
[Result "1-0"]
[ECO "A70"]
[EventDate "1971.08.02"]
[PlyCount "47"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.e4 a6 8.a4 Bg7 9.
Be2 Nbd7 10.Bg5 O-O 11.Nd2 Qc7 12.O-O Ne5 13.f4 Neg4 14.Nc4 Nh6 15.Nxd6 
Nfg4 16.Nc4 Bd7 17.h3 Bd4+ 18.Kh1 f6 19.Bxh6 Nxh6 20.a5 g5 21.d6 Qc6 22.
Nd5 Nf5 23.Qd3 Be6 24.Ne7+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Cappello, Renato"]
[Black "Roofthoofd, Marcel"]
[Result "1-0"]
[ECO "C05"]
[EventDate "1971.08.02"]
[PlyCount "58"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.g3 cxd4 
9.cxd4 Bb4+ 10.Kf2 f6 11.Kg2 O-O 12.Bd3 Be7 13.Ne2 Kh8 14.h4 h6 15.Bb1 f5 
16.Ng5 Nd8 17.Nc3 Rg8 18.g4 Rf8 19.gxf5 exf5 20.Nxd5 Qc6 21.Qf3 Bxg5 22.
hxg5 b6 23.Nc3 Qxf3+ 24.Kxf3 Bb7+ 25.d5 Rc8 26.Kf2 Kh7 27.Be3 Nc5 28.Rh3 
Na6 29.e6 Bxd5 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Cruz, Jorge"]
[Black "Bellin, Robert"]
[Result "0-1"]
[ECO "C02"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7 6.Be2 cxd4 7.cxd4 Nc6 8.Nc3 
Nge7 9.Na4 Qc7 10.O-O b6 11.Be3 Nf5 12.Rc1 Qd8 13.Nc3 Be7 14.Qd2 f6 15.Bd3
Nxe3 16.Qxe3 O-O 17.exf6 Bxf6 18.Ne2 Qe8 19.Ng5 Bxg5 20.Qxg5 e5 21.dxe5 
Nxe5 22.Rfe1 Nxd3 23.Qxd5+ Qf7 24.Qxd3 Qxf2+ 25.Kh1 Rae8 26.Qxd7 Rxe2 27.
Rg1 a5 28.h3 h6 29.Rc7 Qg3 30.Qd5+ Kh7 31.Rc3 Qf2 32.Qd3+ Kh8 33.Rcc1 Rd2 
34.Qg6 Rxb2 35.Rc7 Qf6 36.Qe4 Rxa2 37.Rc6 Qf2 38.Qe6 Re2 39.Qb3 Re1 40.
Rxe1 Qxe1+ 41.Kh2 Qe5+ 42.Kg1 b5 43.Re6 Qc5+ 44.Kh2 a4 45.Qb2 Qg5 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Kaiszauri, Konstanty"]
[Black "Lev, Arieh"]
[Result "0-1"]
[ECO "B57"]
[EventDate "1971.08.02"]
[PlyCount "120"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Bd7 7.O-O g6 8.Nxc6 
Bxc6 9.Bg5 Bg7 10.Nd5 O-O 11.Bxf6 exf6 12.c3 Re8 13.Qd3 Qd7 14.f4 b5 15.
Bb3 a5 16.f5 a4 17.Bc2 Re5 18.b3 Bxd5 19.exd5 Qa7+ 20.Kh1 Qc5 21.b4 Qb6 
22.c4 Re3 23.c5 Rxd3 24.cxb6 Rd2 25.Be4 Rb8 26.Rfc1 Rd4 27.Bf3 Rxb4 28.
Rab1 Rxb1 29.Rxb1 Rxb6 30.Rb4 Rb8 31.h3 Re8 32.Rxb5 Re1+ 33.Kh2 Ra1 34.Rb2
Bh6 35.Be2 Rc1 36.Rb4 Rc2 37.Bd1 Rxa2 38.Bxa4 Bd2 39.Rc4 Be1 40.Bc2 Ra3 
41.g4 Bg3+ 42.Kg2 Be5 43.h4 Rg3+ 44.Kf2 Kg7 45.fxg6 fxg6 46.h5 Kh6 47.hxg6
hxg6 48.Bd1 Kg5 49.Bf3 Bf4 50.Re4 Rxg4 51.Bxg4 Kxg4 52.Kg2 Kf5 53.Re8 g5 
54.Kf3 g4+ 55.Kf2 Be5 56.Ra8 Kg5 57.Ra4 f5 58.Rb4 f4 59.Ra4 Kf5 60.Rb4 Bf6
0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Shirazi, Kamran"]
[Black "Rosenberg, Michael"]
[Result "1-0"]
[ECO "C00"]
[EventDate "1971.08.02"]
[PlyCount "83"]

1.e4 e6 2.c4 d5 3.exd5 exd5 4.cxd5 Nf6 5.Bb5+ Bd7 6.Bc4 Bd6 7.Ne2 O-O 8.h3
Bf5 9.O-O Nbd7 10.Nbc3 Ne5 11.d3 Qd7 12.Nf4 Rad8 13.Re1 Rfe8 14.Be3 c6 15.
dxc6 bxc6 16.Ba6 Ng6 17.Nxg6 hxg6 18.Qf3 Bb8 19.Bf4 Rxe1+ 20.Rxe1 Nd5 21.
Bxb8 Rxb8 22.Bc4 Be6 23.Ne4 Qe7 24.Re2 Nc7 25.b3 Rd8 26.Qe3 Bxc4 27.dxc4 
Rd1+ 28.Kh2 Qe5+ 29.g3 Ne6 30.Qxa7 Qa1 31.h4 Rh1+ 32.Kg2 Qf1+ 33.Kf3 Qd1 
34.Ng5 Nxg5+ 35.hxg5 Re1 36.Qe3 f6 37.gxf6 g5 38.Qe8+ Kh7 39.Qh5+ Kg8 40.
f7+ Kf8 41.Qh8+ Kxf7 42.Qe8+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Vassiades, Constantinos"]
[Black "Haigh, Geoff"]
[Result "0-1"]
[ECO "B26"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3 e6 7.Qd2 Rb8 8.Nf3 b5 9.
d4 b4 10.Ne2 Nf6 11.Ng5 Ng4 12.h4 Nxe3 13.fxe3 h6 14.Nf3 e5 15.c3 O-O 16.
O-O Qb6 17.Rab1 Ba6 18.d5 Na5 19.b3 bxc3 20.Qc2 c4 21.b4 Qxe3+ 22.Kh2 Nb3 
23.axb3 cxb3 24.Rxb3 Qxe2 25.Qxc3 Rfc8 26.Qa1 Rc2 27.Rg1 Rbc8 28.Qd1 Qxd1 
29.Rxd1 Bc4 30.Ra3 a6 31.Kh3 Bb5 32.Rb3 f5 33.exf5 gxf5 34.Ne1 Ra2 35.Nd3 
0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "6"]
[White "Weber, Leon"]
[Black "Buscio, Jorge"]
[Result "1-0"]
[ECO "E18"]
[EventDate "1971.08.02"]
[PlyCount "53"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 f5 
9.b3 d6 10.Nd2 Nxc3 11.Qxc3 Bxg2 12.Kxg2 c5 13.Bb2 Bf6 14.Nf3 Nc6 15.Qd2 
d5 16.dxc5 Bxb2 17.Qxb2 dxc4 18.Rad1 Qc7 19.cxb6 Qxb6 20.Rd7 Rf7 21.Rxf7 
Kxf7 22.Ng5+ Kg8 23.Nxe6 Qb7 24.Kg1 cxb3 25.Rc1 Re8 26.Rxc6 bxa2 27.Qxa2 
1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Lev, Arieh"]
[Black "Vassiades, Constantinos"]
[Result "1-0"]
[ECO "B92"]
[EventDate "1971.08.02"]
[PlyCount "97"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be6 8.O-O 
Be7 9.f4 Qc7 10.Qd3 b5 11.Qg3 O-O 12.f5 Bc4 13.Bh6 Ne8 14.Bxc4 Qxc4 15.Nd5
Kh8 16.Nxe7 gxh6 17.Qh4 Nd7 18.Rf3 Nef6 19.Qxh6 Qxe4 20.Rg3 Ng4 21.Qh4 
Ngf6 22.Qg5 Rg8 23.Nxg8 Rxg8 24.Qe3 Rxg3 25.Qxg3 Qxf5 26.Qc3 Ne4 27.Qe3 d5
28.Rf1 Qe6 29.Nd2 Ndc5 30.Nxe4 Nxe4 31.Qf3 f6 32.h3 Qc6 33.Qa3 Kg8 34.Qe7 
Qxc2 35.Qd8+ Kg7 36.Qd7+ Kg6 37.Qxd5 Qc5+ 38.Qxc5 Nxc5 39.b3 e4 40.Rc1 Nd3
41.Rc6 a5 42.Rb6 b4 43.Rb5 f5 44.Rxa5 Kg5 45.Kf1 Kf4 46.Ke2 Kg3 47.Rxf5 
Nc1+ 48.Ke3 Nxa2 49.Rg5+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Bellin, Robert"]
[Black "Kaiszauri, Konstanty"]
[Result "1/2-1/2"]
[ECO "C88"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4 Bb7
9.d3 d6 10.Bd2 Nb8 11.axb5 axb5 12.Rxa8 Bxa8 13.Nc3 c6 14.Ne2 Nbd7 15.Ng3 
d5 16.exd5 Nxd5 17.Bxd5 cxd5 18.Nxe5 Nxe5 19.Rxe5 Bf6 20.Re1 Bxb2 21.Qb1 
Qf6 22.Nh5 Qd4 23.Nf4 Qf6 24.Ne2 Be5 25.Qxb5 h5 26.d4 Bb8 27.Qd3 Bc6 28.
Qf3 Qxf3 29.gxf3 Re8 30.Nc1 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Buscio, Jorge"]
[Black "Cruz, Jorge"]
[Result "1/2-1/2"]
[ECO "B20"]
[EventDate "1971.08.02"]
[PlyCount "67"]

1.e4 c5 2.d3 d6 3.g3 g6 4.Bg2 Bg7 5.Nd2 Nc6 6.Ngf3 Nf6 7.O-O O-O 8.Re1 Qc7
9.Nf1 Bd7 10.c3 Rac8 11.Bg5 h6 12.Bf4 Nh5 13.Be3 Rfd8 14.Nh4 Ne5 15.f4 Ng4
16.f5 Nxe3 17.Nxe3 Nf6 18.fxg6 Be6 19.Nd5 Qd7 20.gxf7+ Bxf7 21.Qf3 Re8 22.
Qf5 Be6 23.Nxf6+ exf6 24.Qf3 b6 25.Nf5 Bxf5 26.Qxf5 Qxf5 27.exf5 Re5 28.g4
Rce8 29.Kf2 h5 30.Rxe5 Rxe5 31.Re1 Rxe1 32.Kxe1 hxg4 33.Kf2 Bh6 34.Kg3 
1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Haigh, Geoff"]
[Black "Cappello, Renato"]
[Result "1/2-1/2"]
[ECO "E46"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.d4 e6 2.c4 Nf6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bxc3+ 7.Nxc3 b6 8.cxd5 
exd5 9.Bd3 c5 10.O-O Ba6 11.Re1 Bxd3 12.Qxd3 c4 13.Qc2 Nc6 14.Bd2 Re8 15.
Ne2 Ne4 16.Bc3 b5 17.Nf4 a5 18.b4 Nxc3 19.Qxc3 axb4 20.axb4 Qd6 21.Reb1 g6
22.h3 Reb8 23.Ne2 Qf8 24.Nf4 Rxa1 25.Qxa1 Ra8 26.Qc3 Qd6 27.Ra1 Rd8 28.Rb1
g5 29.Ne2 Ra8 30.Ra1 Qb8 31.Ra3 Ra4 32.Qa1 Qa8 33.Rxa4 Qxa4 34.Qxa4 bxa4 
35.b5 Nb4 36.Nc3 a3 37.b6 Kf8 38.Kf1 Ke8 39.b7 Na6 40.Ke1 Kd7 41.Kd2 Kc7 
42.Kc1 Kxb7 43.Nxd5 Kc6 44.e4 Kb5 45.Nc3+ Kb4 46.Kc2 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Roofthoofd, Marcel"]
[Black "Shirazi, Kamran"]
[Result "1-0"]
[ECO "C29"]
[EventDate "1971.08.02"]
[PlyCount "31"]

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Bg4 6.d3 Nxc3 7.bxc3 d4 8.Be2 
Nc6 9.O-O Bc5 10.Kh1 O-O 11.Ng5 Bxe2 12.Qxe2 Be7 13.Qh5 Bxg5 14.Bxg5 Qd7 
15.Bf6 Rae8 16.Qg5 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "7"]
[White "Rosenberg, Michael"]
[Black "Weber, Leon"]
[Result "1-0"]
[ECO "B93"]
[EventDate "1971.08.02"]
[PlyCount "67"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Qc7 8.Bd3 Be7
9.O-O O-O 10.fxe5 dxe5 11.Qe1 Be6 12.Nh4 Nc6 13.Nf5 Nb4 14.Nxe7+ Qxe7 15.
Bg5 Nxd3 16.cxd3 Qc5+ 17.Be3 Qd6 18.Rd1 Ng4 19.Bc1 Rac8 20.h3 Nf6 21.d4 
Qb6 22.Rxf6 gxf6 23.Bh6 Kh8 24.Qh4 Bc4 25.b3 Rg8 26.bxc4 Rg6 27.Nd5 Qb2 
28.Rd2 Qc1+ 29.Kh2 Rcg8 30.Ne7 Rxg2+ 31.Rxg2 Rxg2+ 32.Kxg2 Qc2+ 33.Qf2 
Qxe4+ 34.Kh2 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Buscio, Jorge"]
[Black "Rosenberg, Michael"]
[Result "0-1"]
[ECO "A16"]
[EventDate "1971.08.02"]
[PlyCount "68"]

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 c6 6.Nxd5 cxd5 7.Nf3 Bg7 8.O-O
O-O 9.d3 Nc6 10.Rb1 e5 11.Bg5 f6 12.Be3 Be6 13.a3 Qd7 14.Qd2 Bh3 15.Bh6 e4
16.Ne1 Bxg2 17.Nxg2 exd3 18.exd3 Nd4 19.Ne1 Qh3 20.Be3 Nf5 21.Nf3 Rfe8 22.
Rfe1 h5 23.Nd4 h4 24.Nxf5 Qxf5 25.Rbc1 h3 26.Qd1 d4 27.Bxd4 Qd5 28.Re4 
Rad8 29.Rc5 Qd6 30.Qb3+ Kf8 31.Rc4 Qd5 32.Bxa7 Rxe4 33.Qb4+ Re7 34.Rd4 
Qg2# 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Cappello, Renato"]
[Black "Lev, Arieh"]
[Result "1/2-1/2"]
[ECO "B98"]
[EventDate "1971.08.02"]
[PlyCount "28"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.O-O-O Nc6 10.Be2 Bd7 11.f5 Nxd4 12.Rxd4 Bc6 13.fxe6 fxe6 14.Kb1 Qa5 
1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Cruz, Jorge"]
[Black "Kaiszauri, Konstanty"]
[Result "1-0"]
[ECO "A00"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.g3 g6 2.Bg2 Bg7 3.d4 Nf6 4.e4 d6 5.Ne2 O-O 6.O-O e5 7.d5 c6 8.c4 cxd5 9.
cxd5 Nbd7 10.Nbc3 a5 11.a3 Nh5 12.g4 Nf4 13.Nxf4 exf4 14.Bxf4 Ne5 15.h3 b6
16.Bxe5 Bxe5 17.f4 Bg7 18.Re1 Re8 19.Rc1 b5 20.Kh1 b4 21.axb4 axb4 22.Nb5 
Ra5 23.Rxc8 Qxc8 24.Nxd6 Qd7 25.Nxe8 Qxe8 26.e5 h6 27.d6 g5 28.d7 Qd8 29.
e6 Bf6 30.e7 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Shirazi, Kamran"]
[Black "Haigh, Geoff"]
[Result "0-1"]
[ECO "B53"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.c4 Nf6 8.Nc3
g6 9.O-O Bg7 10.Bg5 O-O 11.Qe3 Rc8 12.Rfe1 Qa5 13.h3 Rfe8 14.e5 dxe5 15.
Nxe5 Qb4 16.Re2 b6 17.Nxc6 Rxc6 18.Nd5 Qxc4 19.Nxe7+ Kf8 20.Bxf6 Re6 21.
Bxg7+ Kxg7 22.Nf5+ gxf5 23.Qg3+ Rg6 24.Rxe8 Rxg3 25.fxg3 Qd4+ 26.Kh2 f4 
27.Re2 Qd3 28.Rae1 fxg3+ 29.Kh1 h5 30.Re3 Qd6 31.Rf3 f6 32.Ref1 b5 33.Rf5 
Qb4 34.b3 a6 35.Rxf6 Qa3 36.Rf7+ Kg6 37.R1f6+ Kg5 38.Rf1 Qd6 39.b4 Qe5 40.
a3 Qd6 41.R7f6 Qxf6 42.Rxf6 Kxf6 43.Kg1 h4 44.Kf1 Ke5 45.Ke2 Ke4 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Vassiades, Constantinos"]
[Black "Bellin, Robert"]
[Result "0-1"]
[ECO "A04"]
[EventDate "1971.08.02"]
[PlyCount "46"]

1.Nf3 g6 2.g3 Bg7 3.Bg2 e5 4.d3 Ne7 5.c4 O-O 6.Nc3 d6 7.Rb1 a5 8.O-O c6 9.
Qc2 f5 10.b3 Nd7 11.a3 h6 12.b4 g5 13.b5 c5 14.Nd5 Nxd5 15.cxd5 Nf6 16.e4 
f4 17.h3 Qe8 18.g4 h5 19.Nxg5 hxg4 20.hxg4 Qg6 21.Ne6 f3 22.Bxf3 Bxe6 23.
dxe6 Nxg4 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.09"]
[Round "8"]
[White "Weber, Leon"]
[Black "Roofthoofd, Marcel"]
[Result "1-0"]
[ECO "E10"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.d4 e6 2.c4 Nf6 3.Nf3 c5 4.d5 b5 5.e3 Bb7 6.cxb5 Bxd5 7.Nc3 Bb7 8.Be2 d5 
9.O-O Bd6 10.Qa4 O-O 11.Rd1 e5 12.b3 e4 13.Ne1 Nbd7 14.Qa3 Qe7 15.Qb2 Ne5 
16.Qd2 Nfg4 17.Nxe4 Bc7 18.Ng3 Qh4 19.Bxg4 Qxg4 20.Qe2 Qe6 21.Bb2 f5 22.
Nd3 Nxd3 23.Qxd3 f4 24.exf4 d4 25.Re1 Qd5 26.Qe4 Bxf4 27.Qxd5+ Bxd5 28.Nh5
Bd6 29.b4 Rae8 30.a4 Rxe1+ 31.Rxe1 g6 32.bxc5 Bxc5 33.Re5 Rf5 34.Rxf5 gxf5
35.Nf6+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Lev, Arieh"]
[Black "Shirazi, Kamran"]
[Result "1-0"]
[ECO "C43"]
[EventDate "1971.08.02"]
[PlyCount "61"]

1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Nc6 8.Nxc6 
bxc6 9.c5 Be7 10.Nd2 Bf6 11.Nxe4 dxe4 12.Bxe4 Ba6 13.Re1 Qxd4 14.Qc2 h6 
15.Rb1 Rfe8 16.Bf4 Rxe4 17.Rxe4 Bd3 18.Rxd4 Bxc2 19.Rc1 Bxd4 20.Rxc2 Re8 
21.Kf1 Re7 22.b3 Be5 23.Re2 f6 24.Bxe5 Rxe5 25.Rxe5 fxe5 26.Ke2 Kf7 27.Ke3
Ke6 28.Ke4 g5 29.h3 Kf6 30.f3 h5 31.g3 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Bellin, Robert"]
[Black "Cappello, Renato"]
[Result "1/2-1/2"]
[ECO "D36"]
[EventDate "1971.08.02"]
[PlyCount "77"]

1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 Nbd7 6.e3 Be7 7.Qc2 c6 8.Bd3 
h6 9.Bh4 O-O 10.Nge2 Re8 11.O-O Ne4 12.Bxe7 Qxe7 13.Rae1 Ndf6 14.Nd1 h5 
15.f3 Ng5 16.Nc1 h4 17.Qf2 h3 18.g4 g6 19.Qg3 Kg7 20.Nf2 Bd7 21.Nb3 b6 22.
Qf4 Nfh7 23.e4 Qf6 24.Qxf6+ Nxf6 25.Nd2 dxe4 26.Nfxe4 Nfxe4 27.Nxe4 Nxe4 
28.Bxe4 f5 29.gxf5 gxf5 30.Bc2 Kf6 31.Kf2 Rxe1 32.Rxe1 Be6 33.a3 Rd8 34.
Rd1 Rg8 35.Rg1 Rxg1 36.Kxg1 Kg5 37.Kf2 Kf4 38.Bd3 Bd5 39.Be2 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Haigh, Geoff"]
[Black "Weber, Leon"]
[Result "0-1"]
[ECO "D19"]
[EventDate "1971.08.02"]
[PlyCount "84"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O O-O
9.Qe2 Bg6 10.Ne5 Nbd7 11.Nxg6 hxg6 12.Rd1 Qc7 13.e4 Rac8 14.e5 Nd5 15.Ne4 
Be7 16.Bg5 Bxg5 17.Nxg5 Rfd8 18.Ra3 Nf8 19.Qg4 Nh7 20.Ne4 Ne7 21.Nd6 Rxd6 
22.exd6 Qxd6 23.Rb3 b6 24.a5 b5 25.Bd3 Nf6 26.Qh4 a6 27.Bb1 c5 28.g4 c4 
29.Rh3 Kf8 30.Qh8+ Neg8 31.Qh4 Qc7 32.Rf3 Qc6 33.Qg3 Ne7 34.g5 Nh5 35.Qg4 
Kg8 36.Qe4 Qc7 37.Re1 Nd5 38.Qg4 Re8 39.Bxg6 fxg6 40.Rxe6 Qc8 41.Rxe8+ 
Qxe8 42.h4 b4 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Kaiszauri, Konstanty"]
[Black "Vassiades, Constantinos"]
[Result "1/2-1/2"]
[ECO "B87"]
[EventDate "1971.08.02"]
[PlyCount "40"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.O-O Be7
9.f4 Bb7 10.Be3 Nbd7 11.Bxe6 fxe6 12.Nxe6 Qb8 13.Nxg7+ Kd8 14.Nd5 Bxd5 15.
exd5 Qb7 16.Ne6+ Kc8 17.c4 bxc4 18.Rc1 Qxd5 19.Qxd5 Nxd5 20.Rxc4+ Kb7 
1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Roofthoofd, Marcel"]
[Black "Buscio, Jorge"]
[Result "1-0"]
[ECO "C02"]
[EventDate "1971.08.02"]
[PlyCount "49"]

1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 Nc6 5.c3 Qb6 6.Bd3 Bd7 7.O-O f5 8.dxc5 Bxc5 
9.b4 Bf8 10.a4 Nge7 11.b5 Na5 12.Nbd2 Rc8 13.Nb3 Nc4 14.Nbd4 h6 15.h4 Ng6 
16.Re1 Qa5 17.Bxf5 exf5 18.e6 Qxc3 19.exd7+ Kxd7 20.Nxf5 Qxa1 21.Qxd5+ Bd6
22.Bd2 Qa3 23.h5 Qc5 24.Qe6+ Kd8 25.hxg6 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "9"]
[White "Rosenberg, Michael"]
[Black "Cruz, Jorge"]
[Result "1/2-1/2"]
[ECO "C89"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.Re1 O-O 8.c3 d5 
9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 Nf6 12.d4 Bd6 13.Re2 Bb7 14.Qd3 Ng4 15.h3
Qh4 16.Nd2 Rae8 17.Nf3 Be4 18.Nxh4 Bxd3 19.Rxe8 Rxe8 20.Nf3 Nf6 21.Bd2 Ne4
22.Re1 Re7 23.Bc1 Kf8 24.Ne5 Nc5 25.Bf4 Bxe5 26.Rxe5 Nxb3 27.axb3 Rxe5 28.
Bxe5 c6 29.f3 Bc2 30.b4 f6 31.Bf4 Ke7 32.Kf2 Ke6 33.Ke2 h5 34.h4 f5 35.Ke3
g6 36.Bc7 Bb3 37.Kf4 Bc4 38.Kg5 Kf7 39.Kf4 Ke6 40.g3 Bb3 41.Kg5 Kf7 42.Kf4
Ke6 43.Bb8 Bc4 44.Kg5 Kf7 45.Kf4 Ke6 46.Kg5 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Buscio, Jorge"]
[Black "Haigh, Geoff"]
[Result "0-1"]
[ECO "B32"]
[EventDate "1971.08.02"]
[PlyCount "100"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nf3 Nf6 6.Bd3 Be7 7.a3 d5 8.Qe2 d4
9.O-O O-O 10.c3 Bg4 11.h3 Bxf3 12.Qxf3 Nd7 13.Nd2 dxc3 14.bxc3 Rc8 15.Nb3 
Na5 16.Nxa5 Qxa5 17.Bb2 Nb6 18.a4 Nc4 19.Bxc4 Rxc4 20.Qe2 Rfc8 21.Rfd1 Qc7
22.Rd5 Qc6 23.a5 f6 24.Rad1 Ra4 25.Qb5 Qxb5 26.Rxb5 Rc7 27.Rbd5 Kf8 28.Rd7
Rac4 29.f3 Ke8 30.R7d5 R7c5 31.Rxc5 Bxc5+ 32.Kf1 Ra4 33.Ra1 Rxa1+ 34.Bxa1 
Kd7 35.Ke2 Kc6 36.c4 Bb4 37.Bb2 Kc5 38.Kd3 Bxa5 39.Bc1 Bb4 40.g4 g5 41.
Be3+ Kc6 42.Bxa7 b6 43.c5 Bxc5 44.Kc4 Kb7 45.Bxb6 Kxb6 46.Kd5 Be3 47.Ke6 
Bf4 48.Kxf6 Kc5 49.Kg7 Kd4 50.Kxh7 Ke3 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Cappello, Renato"]
[Black "Kaiszauri, Konstanty"]
[Result "0-1"]
[ECO "C50"]
[EventDate "1971.08.02"]
[PlyCount "72"]

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Bc5 5.d3 d6 6.Bg5 Na5 7.Nd5 Nxc4 8.dxc4 
c6 9.Nxf6+ gxf6 10.Bh4 Be6 11.Nd2 Rg8 12.Qf3 Rg6 13.c3 a5 14.b3 Qd7 15.h3 
Rh6 16.Rf1 O-O-O 17.Bg3 f5 18.exf5 Bxf5 19.a3 Bg6 20.Qf6 e4 21.b4 e3 22.
Ne4 exf2+ 23.Rxf2 Bxf2+ 24.Kxf2 Qf5+ 25.Qxf5+ Bxf5 26.Nd2 a4 27.c5 dxc5 
28.Nc4 b5 29.Nb6+ Kb7 30.bxc5 Rd2+ 31.Kf1 Rg6 32.Bf2 Bd3+ 33.Kg1 Be4 34.g3
Rf6 35.Re1 Rfxf2 36.Rxe4 Rfe2 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Cruz, Jorge"]
[Black "Vassiades, Constantinos"]
[Result "1-0"]
[ECO "A00"]
[EventDate "1971.08.02"]
[PlyCount "53"]

1.g3 Nf6 2.Bg2 g6 3.d4 Bg7 4.e4 d6 5.Ne2 O-O 6.O-O e5 7.d5 Nbd7 8.c4 Nc5 
9.Nbc3 a5 10.a3 a4 11.Be3 Nfd7 12.Nc1 f5 13.f3 f4 14.Bf2 Nb6 15.b4 axb3 
16.Nxb3 Nxc4 17.Nxc5 dxc5 18.Bxc5 fxg3 19.hxg3 Bh6 20.Qe2 Nd6 21.Be3 Bg7 
22.Rfc1 b6 23.Nb5 Nxb5 24.Qxb5 Ba6 25.Qc6 Rf7 26.Rc2 Bf8 27.Bh3 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Rosenberg, Michael"]
[Black "Roofthoofd, Marcel"]
[Result "0-1"]
[ECO "B34"]
[EventDate "1971.08.02"]
[PlyCount "124"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Nxc6 bxc6 7.e5 Nd5 8.
Nxd5 cxd5 9.Qxd5 Rb8 10.Bc4 e6 11.Qd4 Bg7 12.Bf4 Qa5+ 13.Qd2 Qc5 14.Qe2 
Rxb2 15.Bd3 Qc3+ 16.Qd2 Bxe5 17.Qxc3 Bxc3+ 18.Ke2 Rb4 19.Bd2 Bxd2 20.Kxd2 
Kd8 21.h4 Bb7 22.Rhb1 Rxb1 23.Rxb1 Kc7 24.g3 h6 25.Rb3 d6 26.Rc3+ Kb8 27.
Rb3 Rc8 28.Bb5 Ka8 29.Rd3 Rd8 30.Rc3 Kb8 31.Rb3 Kc7 32.Rc3+ Kb8 33.Rb3 Rc8
34.Bd7 Rc7 35.Bb5 Kc8 36.Ra3 Be4 37.c4 Kd8 38.Ke3 Ba8 39.f4 Ke7 40.h5 gxh5
41.Rc3 Kf6 42.Rc1 Bb7 43.Rc2 Rc5 44.Kd4 Bc6 45.a4 Bxb5 46.axb5 Kf5 47.Ra2 
Rc7 48.Rh2 Kg4 49.f5 Kxf5 50.Rxh5+ Kg6 51.g4 f5 52.Rh4 f4 53.Rh1 Rc5 54.
Ra1 e5+ 55.Kd3 d5 56.cxd5 Rxd5+ 57.Ke4 Rxb5 58.Rxa7 Kf6 59.Ra6+ Kg5 60.Rc6
Rb4+ 61.Kxe5 f3 62.Ra6 f2 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Shirazi, Kamran"]
[Black "Bellin, Robert"]
[Result "0-1"]
[ECO "E42"]
[EventDate "1971.08.02"]
[PlyCount "50"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 O-O 6.a3 cxd4 7.axb4 dxc3 8.Nxc3 
d5 9.cxd5 exd5 10.Be2 Nc6 11.b5 d4 12.Na2 Ne7 13.O-O Nf5 14.exd4 Nxd4 15.
Be3 Nxe2+ 16.Qxe2 Bg4 17.f3 Bf5 18.Rfd1 Qe7 19.Qf2 b6 20.Rd4 a6 21.Nb4 
axb5 22.Rad1 h6 23.Nc6 Qc7 24.Rd6 Ne8 25.Bxb6 Qxd6 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.11"]
[Round "10"]
[White "Weber, Leon"]
[Black "Lev, Arieh"]
[Result "0-1"]
[ECO "D24"]
[EventDate "1971.08.02"]
[PlyCount "84"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.a4 Nc6 6.e3 Na5 7.Ne5 Be6 8.Be2 g6 
9.Bd2 Bg7 10.Ra3 c6 11.O-O Nd7 12.Nxd7 Qxd7 13.Ne4 Nb3 14.Bb4 a5 15.Bc3 
O-O 16.Nd2 Nxd2 17.Qxd2 b6 18.e4 f5 19.exf5 Rxf5 20.Re1 Rf7 21.Qe3 Raf8 
22.f3 Bd5 23.Rc1 h5 24.Be1 Bxf3 25.Bc3 Bxe2 26.Qxe2 Bxd4+ 27.Kh1 Rf2 28.
Qxc4+ Kh7 29.Bxd4 R2f4 30.Re3 c5 31.Rce1 R8f7 32.g3 Qxd4 33.Qxd4 Rxd4 34.
Rxe7 Rxe7 35.Rxe7+ Kh6 36.Re2 Rxa4 37.Kg2 Ra2 38.Kf3 a4 39.g4 hxg4+ 40.
Kxg4 a3 41.Re6 axb2 42.Rxb6 Ra4+ 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Lev, Arieh"]
[Black "Buscio, Jorge"]
[Result "1/2-1/2"]
[ECO "C08"]
[EventDate "1971.08.02"]
[PlyCount "19"]

1.e4 e6 2.d4 d5 3.Nd2 a6 4.Ngf3 c5 5.exd5 exd5 6.c3 Nc6 7.dxc5 Bxc5 8.Nb3 
Ba7 9.Nfd4 Nge7 10.Be3 1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Bellin, Robert"]
[Black "Weber, Leon"]
[Result "0-1"]
[ECO "B87"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.e4 c5 2.Nf3 d6 3.Nc3 a6 4.d4 cxd4 5.Nxd4 Nf6 6.Bc4 e6 7.Bb3 b5 8.O-O Be7
9.Qf3 Qc7 10.Qg3 O-O 11.a3 Nc6 12.Nxc6 Qxc6 13.Bh6 Ne8 14.Nd5 Qb7 15.Nxe7+
Qxe7 16.Rad1 Bb7 17.f3 Kh8 18.Bd2 a5 19.Bc3 f6 20.Rf2 e5 21.f4 Bxe4 22.Re1
Bc6 23.fxe5 dxe5 24.Qe3 Nc7 25.Qb6 Ra6 26.Qe3 Rd8 27.Qg3 Qc5 28.Qh4 Raa8 
29.Bf7 Be8 30.Bxe8 Rxe8 31.Bxa5 Rxa5 32.b4 Ra4 33.Re3 Qxe3 0-1

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Haigh, Geoff"]
[Black "Rosenberg, Michael"]
[Result "1/2-1/2"]
[ECO "A05"]
[EventDate "1971.08.02"]
[PlyCount "69"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.Nc3 d6 6.Rb1 Nbd7 7.b3 c6 8.Bb2 
Qc7 9.e3 e5 10.d3 Re8 11.Nd2 Nc5 12.Ba3 Ne6 13.Nc4 Rd8 14.Qd2 Ng5 15.Rfc1 
Bh3 16.Bh1 Be6 17.Bg2 h6 18.Nb2 Rab8 19.Nbd1 Ngh7 20.Ne2 Nf8 21.c4 N6h7 
22.d4 f5 23.d5 Bf7 24.Ndc3 c5 25.f3 a6 26.Bb2 Nd7 27.Re1 Nhf6 28.e4 Kh7 
29.Nd1 Ng8 30.Ne3 Ne7 31.Bc3 Rf8 32.Qc2 Be8 33.Bh3 fxe4 34.fxe4 Nf6 35.Kh1
1/2-1/2

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Kaiszauri, Konstanty"]
[Black "Shirazi, Kamran"]
[Result "1-0"]
[ECO "C43"]
[EventDate "1971.08.02"]
[PlyCount "59"]

1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Qxd4 d5 6.exd6 Nxd6 7.Bd3 Qe7+ 8.
Be3 Bf5 9.O-O Nc6 10.Qa4 Bxd3 11.cxd3 Qd7 12.Nc3 Be7 13.d4 O-O 14.d5 Nb8 
15.Qb3 a5 16.a4 Na6 17.Rfe1 Bf6 18.Rad1 Rfe8 19.Bd4 Bxd4 20.Nxd4 Nb4 21.h3
Nf5 22.Nxf5 Qxf5 23.Qc4 h5 24.Qxc7 h4 25.Rxe8+ Rxe8 26.d6 Nd3 27.d7 Qxf2+ 
28.Kh2 Re3 29.d8=Q+ Kh7 30.Qxd3+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Roofthoofd, Marcel"]
[Black "Cruz, Jorge"]
[Result "1-0"]
[ECO "C29"]
[EventDate "1971.08.02"]
[PlyCount "71"]

1.e4 e5 2.Nc3 Nf6 3.f4 d6 4.Bc4 Bg4 5.Nge2 Nc6 6.d3 Qd7 7.Be3 O-O-O 8.Qd2 
exf4 9.Nxf4 g5 10.Nfd5 Nxd5 11.Bxd5 h6 12.Nb5 Kb8 13.Bxc6 Qxc6 14.Bxa7+ 
Kc8 15.Bd4 Qxb5 16.Bxh8 f5 17.O-O f4 18.c4 Qc5+ 19.Kh1 Be7 20.b4 Qb6 21.
Bc3 Rf8 22.Qf2 Qc6 23.h3 Be6 24.Qa7 h5 25.b5 Qb6 26.Qxb6 cxb6 27.Bd4 Kc7 
28.a4 g4 29.hxg4 Bxg4 30.a5 bxa5 31.Rxa5 Bh4 32.Bf2 Be7 33.d4 Be2 34.Re1 
f3 35.g3 Rg8 36.b6+ 1-0

[Event "11th World U20 final C"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "11"]
[White "Vassiades, Constantinos"]
[Black "Cappello, Renato"]
[Result "0-1"]
[ECO "A87"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.Nf3 f5 2.d4 Nf6 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.c4 c5 7.d5 Ne4 8.Nfd2 Nxd2
9.Nxd2 d6 10.Nf3 Nd7 11.Qc2 Rb8 12.a4 b6 13.Ra3 a6 14.Qd3 Nf6 15.Ng5 Qc7 
16.e4 fxe4 17.Nxe4 b5 18.axb5 axb5 19.b3 bxc4 20.bxc4 Ng4 21.Qe2 Bd4 22.h3
Ne5 23.Bd2 Rb2 24.Rc1 Bf5 25.Rf1 Rc2 26.g4 Bxe4 27.Bxe4 Rxd2 28.Qxd2 Nxc4 
29.Qa2 Nxa3 30.Qxa3 c4 31.Qc1 Qc5 32.Qc2 Kg7 33.Kg2 Rb8 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Gatt, Anthony"]
[Black "Pena Serrano, Virginio"]
[Result "1/2-1/2"]
[ECO "B19"]
[EventDate "1971.08.02"]
[PlyCount "62"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.Bc4 e6
9.c3 Qc7 10.Bd3 Bxd3 11.Qxd3 Ngf6 12.Be3 Bd6 13.Ne2 O-O-O 14.a4 e5 15.dxe5
Bxe5 16.O-O Ng4 17.Nxe5 Ndxe5 18.Qf5+ Kb8 19.Bf4 g6 20.Qc2 Ka8 21.f3 Nf6 
22.a5 Nd5 23.Qe4 Nxf4 24.Qxf4 g5 25.Qf6 Nc4 26.a6 Rhe8 27.axb7+ Qxb7 28.
Rfd1 Rxd1+ 29.Rxd1 Nxb2 30.Rd8+ Rxd8 31.Qxd8+ Qb8 1/2-1/2

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Gresh, Nohad"]
[Black "Kwan Ka Kin"]
[Result "0-1"]
[ECO "E91"]
[EventDate "1971.08.02"]
[PlyCount "66"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 Bg4 7.O-O Nbd7 8.h3 
Bxf3 9.Bxf3 c6 10.Be3 h6 11.Qd2 Kh7 12.b4 Qc7 13.Rab1 Rfd8 14.Rfc1 Nf8 15.
Na4 N6d7 16.Rb3 a6 17.c5 dxc5 18.bxc5 g5 19.Rcb1 Rab8 20.Qb2 Qa5 21.Nc3 e5
22.Bd2 Qc7 23.Rxb7 Rxb7 24.Qxb7 Qxb7 25.Rxb7 exd4 26.Na4 Ne6 27.Bb4 Ne5 
28.Rb6 Nxf3+ 29.gxf3 d3 30.Rxc6 d2 31.Bxd2 Rxd2 32.Rxa6 Rd1+ 33.Kg2 Nf4+ 
0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Ipek, Ali"]
[Black "Karakasoglou, Alexandros"]
[Result "0-1"]
[ECO "D94"]
[EventDate "1971.08.02"]
[PlyCount "82"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.h3 c5 7.Be2 cxd4 8.exd4 Nc6
9.O-O b6 10.Bf4 Bb7 11.Rc1 dxc4 12.Bxc4 Nb4 13.Be5 Nbd5 14.Qb3 Nxc3 15.
bxc3 Bxf3 16.gxf3 Qd7 17.Bxf6 Bxf6 18.Kg2 Rac8 19.Rfe1 Qf5 20.Qb5 e5 21.
dxe5 Rc5 22.Qb4 Bxe5 23.Bb3 Bf4 24.Rcd1 Qg5+ 25.Kf1 Qh4 26.Re4 Qxh3+ 27.
Ke2 Bg5 28.Rd5 Rxd5 29.Bxd5 Qd7 30.c4 Rb8 31.Qb1 b5 32.Rg4 Re8+ 33.Kf1 Bd2
34.Qxb5 Re1+ 35.Kg2 Qd8 36.Qa6 Qe7 37.Qc6 Kg7 38.Qb7 Qf6 39.Qxa7 h5 40.Rg3
Bf4 41.Qa3 Qa1 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.02"]
[Round "1"]
[White "Makropoulos, Georgios"]
[Black "Adad, Carlos"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1971.08.02"]
[PlyCount "63"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 5.f3 Nc6 6.Qd2 O-O 7.O-O-O e5 8.d5 Ne7
9.g4 a6 10.h4 h5 11.gxh5 Nxh5 12.Bh3 b5 13.Bg4 Nf6 14.h5 Bxg4 15.h6 Bh8 
16.h7+ Nxh7 17.fxg4 f6 18.Nf3 Qd7 19.Rxh7 Kxh7 20.Qh2+ Kg8 21.Rh1 Bg7 22.
Qh7+ Kf7 23.Bh6 Rg8 24.Ng5+ fxg5 25.Rf1+ Ke8 26.Bxg7 b4 27.Ne2 Rc8 28.Bh6 
c6 29.Bxg5 Qa7 30.Rf7 Rc7 31.Bxe7 Qe3+ 32.Kd1 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "2"]
[White "Adad, Carlos"]
[Black "Gatt, Anthony"]
[Result "1-0"]
[ECO "C89"]
[EventDate "1971.08.02"]
[PlyCount "91"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O a6 5.Ba4 Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 
9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.g3 Bd6 13.Re1 Bh3 14.d4 Qd7 15.Nd2 
Rae8 16.Ne4 Qf5 17.Bc2 Bg4 18.Qd3 Qh5 19.Bd2 Bc7 20.Ng5 Nf6 21.a4 Be2 22.
Qf5 h6 23.Nh3 Bg4 24.Qxh5 Nxh5 25.Kg2 Nf6 26.axb5 axb5 27.f3 Be6 28.Nf4 
Bxf4 29.Bxf4 Ra8 30.Bd6 Rfc8 31.g4 Nd5 32.Be4 Rxa1 33.Rxa1 Ne3+ 34.Kf2 Nc4
35.Ba3 g6 36.h3 Kg7 37.f4 Nd2 38.Bd3 Nb3 39.Re1 Kf6 40.Re5 Bd5 41.Bxb5 Nd2
42.Bd3 Ra8 43.g5+ hxg5 44.fxg5+ Kg7 45.Be7 Rc8 46.Bf6+ {time} 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "2"]
[White "Ipek, Ali"]
[Black "Makropoulos, Georgios"]
[Result "0-1"]
[ECO "A96"]
[EventDate "1971.08.02"]
[PlyCount "34"]

1.d4 f5 2.g3 e6 3.Bg2 Nf6 4.c4 Be7 5.Nc3 O-O 6.Nf3 d6 7.O-O a5 8.Bg5 Ne4 
9.Bxe7 Qxe7 10.Nd2 Nxd2 11.Qxd2 f4 12.Be4 c6 13.Qd3 g5 14.Kh1 d5 15.Bg2 
Qg7 16.e4 dxc4 17.Qxc4 f3 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "2"]
[White "Karakasoglou, Alexandros"]
[Black "Kwan Ka Kin"]
[Result "1-0"]
[ECO "B30"]
[EventDate "1971.08.02"]
[PlyCount "57"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 e6 4.O-O Nge7 5.d4 cxd4 6.Nxd4 a6 7.Nxc6 Nxc6 8.
Bxc6 bxc6 9.e5 d5 10.exd6 Bxd6 11.Nd2 Qc7 12.h3 Bb7 13.Nc4 Bh2+ 14.Kh1 c5 
15.Qe2 O-O-O 16.Bd2 Rd4 17.f3 h5 18.Bc3 g5 19.Na5 Bd5 20.Qxa6+ Kd7 21.Bxd4
cxd4 22.c4 dxc3 23.Rac1 g4 24.Rxc3 Qb8 25.Nc4 gxf3 26.Nb6+ Qxb6 27.Qxb6 
fxg2+ 28.Kxh2 gxf1=Q 29.Rc7+ 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.04"]
[Round "2"]
[White "Pena Serrano, Virginio"]
[Black "Gresh, Nohad"]
[Result "0-1"]
[ECO "A31"]
[EventDate "1971.08.02"]
[PlyCount "72"]

1.d4 Nf6 2.c4 c5 3.Nf3 g6 4.g3 Bg7 5.Bg2 O-O 6.O-O Qb6 7.d5 d6 8.Nc3 e6 9.
e4 exd5 10.exd5 Re8 11.Re1 Rxe1+ 12.Qxe1 Bf5 13.Qe7 Nbd7 14.Ng5 Ne5 15.Nb5
Rd8 16.Qc7 Qxc7 17.Nxc7 a6 18.b3 Rc8 19.Nxa6 bxa6 20.Be3 Neg4 21.Rd1 h6 
22.Nf3 Nxe3 23.fxe3 Ng4 24.Re1 Be4 25.Nd2 Bxg2 26.Kxg2 Bc3 27.Re2 Re8 28.
Nf1 a5 29.Kf3 Ne5+ 30.Kg2 a4 31.Rc2 Bb4 32.h3 axb3 33.axb3 Ra8 34.Nd2 Bxd2
35.Rxd2 Rb8 36.Rb2 Nxc4 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "3"]
[White "Gatt, Anthony"]
[Black "Ipek, Ali"]
[Result "0-1"]
[ECO "B07"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.e4 d6 2.f4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bc4 O-O 6.O-O Bg4 7.d3 Nc6 8.Be3 e6 
9.Bb5 Ne7 10.h3 Bxf3 11.Qxf3 c6 12.Bc4 Nd7 13.Bb3 d5 14.Bd2 Nc5 15.Rad1 a5
16.a3 Nxb3 17.cxb3 Qb6+ 18.Kh1 Qxb3 19.Rb1 Rfd8 20.e5 Nf5 21.Ne2 Qc2 22.
Rfd1 c5 23.g4 Ne7 24.Be1 Qb3 25.Bh4 Rd7 26.Bf2 b6 27.h4 f6 28.exf6 Bxf6 
29.Qe3 d4 30.Qh3 Bg7 31.Kg1 Rf8 32.Be1 Nd5 33.Bd2 c4 34.g5 Qxd3 35.Qxe6+ 
Rdf7 36.Qxd5 Qxe2 37.Kh1 c3 38.bxc3 dxc3 39.Bxc3 Bxc3 40.Rd3 Be1 41.Rf3 
Bxh4 42.Rxb6 Bxg5 43.Re6 Rd7 44.Rxg6+ Kh8 45.Rxg5 Rxd5 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "3"]
[White "Gresh, Nohad"]
[Black "Adad, Carlos"]
[Result "0-1"]
[ECO "E86"]
[EventDate "1971.08.02"]
[PlyCount "48"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 e5 6.Nge2 c6 7.Be3 O-O 8.Qd2 Nbd7 
9.h4 h5 10.O-O-O a6 11.Bh6 b5 12.Bxg7 Kxg7 13.g4 b4 14.Na4 Qa5 15.b3 hxg4 
16.h5 gxf3 17.hxg6 fxg6 18.Ng3 exd4 19.c5 Nxc5 20.Bc4 Be6 21.Rdg1 Kf7 22.
Qf4 Rad8 23.e5 dxe5 24.Qxe5 Nxb3+ 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "3"]
[White "Kwan Ka Kin"]
[Black "Pena Serrano, Virginio"]
[Result "1/2-1/2"]
[ECO "C50"]
[EventDate "1971.08.02"]
[PlyCount "68"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 d6 6.O-O h6 7.Na4 Bb6 8.Nxb6 
axb6 9.c3 Na5 10.Bb5+ Bd7 11.Bxd7+ Qxd7 12.Re1 O-O 13.Nh4 Qg4 14.Qxg4 Nxg4
15.Nf5 Nb3 16.Rb1 Rxa2 17.h3 Nf6 18.Be3 Kh7 19.Kh2 Re8 20.c4 Nd7 21.Red1 
Ndc5 22.Ng3 Nd4 23.Bxd4 exd4 24.Ne2 Ne6 25.f4 c5 26.f5 Nc7 27.Nc1 Ra7 28.
b4 Rea8 29.bxc5 bxc5 30.Rd2 Na6 31.Ne2 Nc7 32.Nc1 b5 33.cxb5 Rb8 34.b6 
Raa8 1/2-1/2

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.06"]
[Round "3"]
[White "Makropoulos, Georgios"]
[Black "Karakasoglou, Alexandros"]
[Result "1-0"]
[ECO "C02"]
[EventDate "1971.08.02"]
[PlyCount "33"]

1.e4 e6 2.d4 d5 3.e5 c5 4.dxc5 Nc6 5.Nf3 Bxc5 6.Bd3 Nge7 7.Bf4 Ng6 8.Bg3 
Bd7 9.O-O Nd4 10.Nxd4 Bxd4 11.c3 Bc5 12.Nd2 Qb6 13.Qe2 a6 14.a4 Bc6 15.Nf3
Qd8 16.h4 Qd7 17.b4 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "4"]
[White "Adad, Carlos"]
[Black "Kwan Ka Kin"]
[Result "0-1"]
[ECO "C97"]
[EventDate "1971.08.02"]
[PlyCount "87"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.h3 d6 
9.c3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Bd7 13.Nf1 Nc4 14.b3 Nb6 15.Bb2 c4 
16.Ne3 Rfe8 17.bxc4 Nxc4 18.Nxc4 bxc4 19.Ba3 g6 20.Ba4 Bxa4 21.Qxa4 Nh5 
22.dxe5 dxe5 23.Bxe7 Rxe7 24.Rab1 a5 25.Nd2 Rc8 26.Rb5 Rd7 27.Nf1 Rd3 28.
Re3 Nf4 29.Kh2 Rcd8 30.Qxa5 Qxa5 31.Rxa5 Rd1 32.Ng3 R8d2 33.Rf3 f6 34.Ra8+
Kg7 35.Ra7+ Kh6 36.Rc7 Rxa2 37.Rxc4 Kg5 38.Rc6 h5 39.Nf5 gxf5 40.g3 fxe4 
41.gxf4+ exf4 42.Rxf4 Kxf4 43.Rxf6+ Kg5 44.Rf8 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "4"]
[White "Ipek, Ali"]
[Black "Gresh, Nohad"]
[Result "1-0"]
[ECO "B24"]
[EventDate "1971.08.02"]
[PlyCount "53"]

1.e4 c5 2.Nc3 Nc6 3.Nge2 g6 4.g3 Bg7 5.Bg2 d6 6.O-O e5 7.d3 Nge7 8.h3 Be6 
9.f4 Qd7 10.Nd5 O-O-O 11.Kh2 f5 12.c3 h5 13.h4 fxe4 14.dxe4 Bg4 15.fxe5 
Nxe5 16.Nxe7+ Qxe7 17.Bg5 Bf6 18.Bxf6 Bxe2 19.Qxe2 Ng4+ 20.Qxg4+ hxg4 21.
Bxe7 Rd7 22.Bf6 Rg8 23.Rad1 Kc7 24.e5 Rh7 25.exd6+ Kd7 26.Bxb7 g5 27.Rfe1 
1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "4"]
[White "Karakasoglou, Alexandros"]
[Black "Pena Serrano, Virginio"]
[Result "1-0"]
[ECO "B98"]
[EventDate "1971.08.02"]
[PlyCount "90"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 
Nbd7 9.O-O-O O-O 10.Be2 Rb8 11.Qg3 Ne8 12.Bxe7 Qxe7 13.Bf3 Nc5 14.Rd2 Nc7 
15.Rhd1 e5 16.Nf5 Bxf5 17.exf5 Rbd8 18.fxe5 dxe5 19.Rxd8 Rxd8 20.Rxd8+ 
Qxd8 21.Qxe5 Nd7 22.Qd6 Ne8 23.Qd2 Qc7 24.Nd5 Qd6 25.Qb4 Nc5 26.Qf4 Qxf4+ 
27.Nxf4 Nd6 28.b4 Nd7 29.Nd3 b6 30.g4 g6 31.fxg6 hxg6 32.Kb2 g5 33.Kb3 f6 
34.c4 Kf8 35.a4 Ke7 36.c5 bxc5 37.bxc5 Ne8 38.Kb4 Kd8 39.Ka5 Nc7 40.Bb7 
Nb8 41.Kb6 Nd7+ 42.Ka7 a5 43.Be4 Nf8 44.Kb6 Nfe6 45.Kxa5 Nd4 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.07"]
[Round "4"]
[White "Makropoulos, Georgios"]
[Black "Gatt, Anthony"]
[Result "1-0"]
[ECO "C32"]
[EventDate "1971.08.02"]
[PlyCount "77"]

1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nd2 Bf5 6.dxe4 Nxe4 7.Bb5+ c6 8.dxc6 
bxc6 9.Qe2 Qe7 10.Bd3 Nxd2 11.Bxf5 Nc4 12.Bd3 Nb6 13.Bd2 Qxe2+ 14.Nxe2 
N8d7 15.c3 O-O-O 16.O-O-O Bd6 17.Nd4 Nb8 18.Be4 Kc7 19.g3 h6 20.Bf3 Rhe8 
21.Be1 Bf8 22.Bf2 Rd7 23.Rd3 Rdd8 24.Rhd1 Na4 25.f5 Nc5 26.R3d2 Ncd7 27.g4
Be7 28.Bg3+ Kb6 29.Nxc6 Nxc6 30.Rxd7 Bg5+ 31.Kc2 Rc8 32.R1d6 Be3 33.c4 Bc5
34.Rxc6+ Rxc6 35.a3 Rcc8 36.b4 Bxb4 37.axb4 Rxc4+ 38.Kb3 Rc1 39.Bf2+ 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "5"]
[White "Gatt, Anthony"]
[Black "Karakasoglou, Alexandros"]
[Result "1/2-1/2"]
[ECO "A08"]
[EventDate "1971.08.02"]
[PlyCount "47"]

1.e4 e6 2.d3 d5 3.Nd2 c5 4.Ngf3 Nf6 5.g3 Be7 6.Bg2 Nc6 7.O-O O-O 8.e5 Nd7 
9.Re1 Qc7 10.Qe2 b5 11.c3 a5 12.h4 b4 13.Nf1 a4 14.Bd2 a3 15.b3 bxc3 16.
Bxc3 Ba6 17.N1h2 Nb4 18.Bxb4 cxb4 19.Rac1 Nc5 20.Qe3 Qa7 21.Bf1 Rfc8 22.
Nd2 Qb7 23.d4 Nd7 24.Nb1 1/2-1/2

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "5"]
[White "Gresh, Nohad"]
[Black "Makropoulos, Georgios"]
[Result "0-1"]
[ECO "A55"]
[EventDate "1971.08.02"]
[PlyCount "42"]

1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e4 e5 5.Nf3 Be7 6.g3 c6 7.Bg2 Qc7 8.O-O Nf8 
9.Be3 Ng6 10.Qe2 h5 11.h4 Bg4 12.Rfc1 Nd7 13.b4 Bxh4 14.gxh4 Nxh4 15.Bg5 
Nxg2 16.Kxg2 exd4 17.Na4 Ne5 18.Qb2 Bxf3+ 19.Kg3 Qd7 20.Rg1 Qg4+ 21.Kh2 
Bg2 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "5"]
[White "Kwan Ka Kin"]
[Black "Ipek, Ali"]
[Result "0-1"]
[ECO "D00"]
[EventDate "1971.08.02"]
[PlyCount "50"]

1.d4 Nf6 2.e3 d5 3.Bd3 c5 4.c3 e6 5.Nd2 Nc6 6.f4 Bd7 7.Ngf3 Bd6 8.O-O cxd4
9.cxd4 Nb4 10.Bb1 Bb5 11.Re1 Rc8 12.Ne5 Qc7 13.a4 Ba6 14.Ra3 O-O 15.g4 Nc6
16.g5 Bxa3 17.gxf6 Nxe5 18.Bxh7+ Kxh7 19.Qh5+ Kg8 20.dxe5 Qc2 21.e4 Bc5+ 
22.Kh1 Rfd8 23.Nf3 Be2 24.fxg7 Bxf3+ 25.Qxf3 Qf2 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.08"]
[Round "5"]
[White "Pena Serrano, Virginio"]
[Black "Adad, Carlos"]
[Result "0-1"]
[ECO "E72"]
[EventDate "1971.08.02"]
[PlyCount "88"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.e4 d6 6.Nc3 Nbd7 7.Nge2 e5 8.O-O Re8
9.Re1 c6 10.d5 cxd5 11.cxd5 a6 12.h3 b5 13.Qc2 Nb6 14.b3 Bd7 15.Be3 b4 16.
Nd1 Bb5 17.Nb2 Nfd7 18.Qd2 a5 19.f3 Nc5 20.Rec1 Rc8 21.Kh2 Kh8 22.Rc2 Nbd7
23.Rac1 Qb6 24.h4 Qa6 25.Ng1 a4 26.Bxc5 Nxc5 27.Qe3 axb3 28.axb3 Ra8 29.
Nc4 Bxc4 30.Rxc4 Qa3 31.Rb1 Qa2 32.Rcc1 Ra3 33.Rd1 Rxb3 34.Rxb3 Nxb3 35.
Qb6 Qc2 36.Qc6 Rc8 37.Qxc2 Rxc2 38.Rb1 Rc3 39.Ne2 Re3 40.Kg1 Nd4 41.Nxd4 
exd4 42.Rxb4 d3 43.Rb1 d2 44.Kf1 Bc3 0-1

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "6"]
[White "Gatt, Anthony"]
[Black "Gresh, Nohad"]
[Result "1-0"]
[ECO "A45"]
[EventDate "1971.08.02"]
[PlyCount "27"]

1.d4 Nf6 2.e3 c5 3.c3 d5 4.Bd3 e6 5.f4 Bd6 6.Nf3 O-O 7.O-O Nbd7 8.Ne5 Qc7 
9.Nd2 Rb8 10.Qe1 b5 11.Qh4 c4 12.Bc2 Nb6 13.Rf3 Bb7 14.Bxh7+ 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "6"]
[White "Ipek, Ali"]
[Black "Pena Serrano, Virginio"]
[Result "1-0"]
[ECO "A48"]
[EventDate "1971.08.02"]
[PlyCount "45"]

1.d4 Nf6 2.Nf3 g6 3.Nc3 Bg7 4.e4 O-O 5.e5 Ne8 6.Bc4 d6 7.Bf4 Nc6 8.O-O Bg4
9.Re1 dxe5 10.dxe5 e6 11.h3 Bxf3 12.Qxf3 Na5 13.Bd3 c5 14.Rad1 Qe7 15.Bb5 
Rd8 16.Ne4 Rxd1 17.Rxd1 Nc6 18.Bxc6 bxc6 19.Be3 f5 20.exf6 Nxf6 21.Bxc5 
Nxe4 22.Bxe7 Rxf3 23.gxf3 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "6"]
[White "Karakasoglou, Alexandros"]
[Black "Adad, Carlos"]
[Result "1/2-1/2"]
[ECO "B41"]
[EventDate "1971.08.02"]
[PlyCount "56"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6 8.Ne2 d5
9.exd5 exd5 10.O-O h6 11.Nxd5 Nxd5 12.cxd5 Qxd5 13.Nf4 Qa5 14.Qe2+ Qe5 15.
Nd5 Qxe2 16.Bxe2 Ba5 17.Bf4 Be6 18.Nc7+ Bxc7 19.Bxc7 Rc8 20.Bb6 Nb4 21.a3 
Rc6 22.Ba5 Nc2 23.Rad1 O-O 24.Bf3 Rc5 25.Bc3 Bc4 26.Be4 Bxf1 27.Kxf1 Nxa3 
28.Bb4 Re5 1/2-1/2

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.10"]
[Round "6"]
[White "Makropoulos, Georgios"]
[Black "Kwan Ka Kin"]
[Result "1-0"]
[ECO "B89"]
[EventDate "1971.08.02"]
[PlyCount "41"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3 Be7 8.Qe2 
a6 9.O-O-O Qc7 10.Bb3 O-O 11.Rhg1 b5 12.g4 b4 13.g5 Nd7 14.Nxc6 Qxc6 15.
Nd5 Bd8 16.Qh5 Re8 17.Bd4 g6 18.Nf6+ Nxf6 19.gxf6 e5 20.Rxg6+ hxg6 21.
Qxg6+ 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "7"]
[White "Adad, Carlos"]
[Black "Ipek, Ali"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1971.08.02"]
[PlyCount "49"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Bg4 7.h3 Bxf3 8.Qxf3 
Nc6 9.Qf2 e5 10.dxe5 dxe5 11.f5 Nb4 12.Bc4 Qd4 13.Bb3 Nxe4 14.Qxd4 exd4 
15.Nxe4 Rfe8 16.O-O Rxe4 17.fxg6 hxg6 18.Rxf7 Kh8 19.Bd2 d3 20.Raf1 Nxc2 
21.Rxg7 Kxg7 22.Rf7+ Kh8 23.Bg5 Nd4 24.Bf6+ Kg8 25.Rg7+ 1-0

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "7"]
[White "Gresh, Nohad"]
[Black "Karakasoglou, Alexandros"]
[Result "1/2-1/2"]
[ECO "D88"]
[EventDate "1971.08.02"]
[PlyCount "65"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 c5 7.Bc4 Bg7 8.Ne2 
O-O 9.O-O Nc6 10.Be3 cxd4 11.cxd4 Na5 12.Bd3 b6 13.Rc1 Bb7 14.Qd2 Rc8 15.
Bh6 Qd7 16.Bxg7 Kxg7 17.f3 Rfd8 18.Qb2 Qd6 19.Rfd1 Nc6 20.Bb5 Qb4 21.Qxb4 
Nxb4 22.Bc4 Nc6 23.a3 Na5 24.Ba2 Ba6 25.Rxc8 Rxc8 26.Rc1 Rxc1+ 27.Nxc1 Nc4
28.a4 Nb2 29.Bb3 Bc4 30.Bxc4 Nxc4 31.Na2 Nb2 32.Nc3 Kf6 33.Kf2 1/2-1/2

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "7"]
[White "Kwan Ka Kin"]
[Black "Gatt, Anthony"]
[Result "1/2-1/2"]
[ECO "E21"]
[EventDate "1971.08.02"]
[PlyCount "22"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 Bxc3+ 5.bxc3 d6 6.e3 Qe7 7.Ba3 O-O 8.Bd3 
Nbd7 9.O-O e5 10.dxe5 Nxe5 11.Nxe5 Qxe5 1/2-1/2

[Event "11th World U20 final D"]
[Site "Athens GRE"]
[Date "1971.08.13"]
[Round "7"]
[White "Pena Serrano, Virginio"]
[Black "Makropoulos, Georgios"]
[Result "0-1"]
[ECO "B34"]
[EventDate "1971.08.02"]
[PlyCount "134"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O 8.Qd2 
d6 9.f3 Bd7 10.O-O Nxd4 11.Bxd4 Bc6 12.Nd5 Nh5 13.Bxg7 Nxg7 14.Kh1 Rc8 15.
c4 Bxd5 16.cxd5 Qb6 17.Rfc1 Nh5 18.b3 Qf2 19.Qe1 Qxe1+ 20.Rxe1 Rc2 21.a4 
Rfc8 22.Bc4 a6 23.g3 Rc5 24.a5 Nf6 25.Ra4 Nd7 26.Kg1 Ne5 27.Re3 Kf8 28.h3 
Nxc4 29.Rxc4 R2xc4 30.bxc4 Rxc4 31.Rb3 Ra4 32.Rxb7 Rxa5 33.Rb8+ Kg7 34.Rb7
Kf6 35.f4 h5 36.Kf2 e5 37.Rb6 Ra2+ 38.Ke3 Ra3+ 39.Kf2 exf4 40.gxf4 Ke7 41.
h4 Rh3 42.Rxa6 Rxh4 43.Ra7+ Kf6 44.Kg3 Rg4+ 45.Kf3 g5 46.fxg5+ Rxg5 47.Rd7
h4 48.Rxd6+ Ke5 49.Rh6 Rg3+ 50.Kf2 Rg4 51.Rh5+ Kxe4 52.d6 Rf4+ 53.Kg2 Rf6 
54.Rxh4+ Ke5 55.Kg3 Rxd6 56.Rh8 Rd3+ 57.Kf2 f5 58.Ke2 Ra3 59.Kf2 Ke4 60.
Re8+ Kf4 61.Ke2 Ra2+ 62.Kf1 Kf3 63.Ke1 Ra1+ 64.Kd2 f4 65.Rf8 Rf1 66.Rf7 
Kg2 67.Rg7+ Kf2 0-1

