[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Ciric, Dragoljub"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "C96"]
[EventDate "1970.07.14"]
[PlyCount "45"]

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 Na5 10.Bc2 c5 11.d4 Nd7 12.Nbd2 cxd4 13.cxd4 Nc6 14.d5 Nb4 15.Bb1 a5 
16.Nf1 Nb6 17.Ng3 g6 18.Bh6 Re8 19.b3 Na6 20.Qd2 Nc5 21.Bc2 b4 22.Nh2 Bf8 
23.Bxf8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Donner, Jan"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[ECO "D44"]
[EventDate "1970.07.14"]
[PlyCount "126"]

1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 e6 5.Bg5 dxc4 6.a4 Qa5 7.Bd2 Bb4 8.e4 c5 
9.Bxc4 cxd4 10.Nxd4 Qc5 11.Bb5+ Nbd7 12.Nb3 Qd6 13.Qe2 O-O 14.f4 e5 15.O-O
a6 16.Bc4 Nb6 17.fxe5 Qxe5 18.Bf4 Qh5 19.e5 Qxe2 20.Bxe2 Nfd5 21.Bd2 Be6 
22.a5 Bxc3 23.bxc3 Nd7 24.c4 Ne7 25.Nd4 Nxe5 26.Nxe6 fxe6 27.Rfb1 N7c6 28.
Rxb7 Nd4 29.Bf1 Nef3+ 30.gxf3 Nxf3+ 31.Kh1 Nxd2 32.Bh3 Rf6 33.Rg1 g6 34.
Re7 Nxc4 35.Bxe6+ Rxe6 36.Rxe6 Kf7 37.Rc6 Nxa5 38.Rc7+ Kf6 39.Rb1 Re8 40.
Rb6+ Re6 41.Rxe6+ Kxe6 42.Rxh7 Nc4 43.Rg7 Kf5 44.Rc7 Ne5 45.Ra7 Nd3 46.
Rxa6 Nf4 47.Kg1 Kg4 48.Ra3 g5 49.Kf2 Nh5 50.Rf3 Nf4 51.Rg3+ Kf5 52.Kf3 Nh5
53.Rg2 Nf6 54.Ra2 Kg6 55.Ke3 Kh5 56.Kf3 Kg6 57.Ra8 Kf5 58.Ra5+ Kg6 59.h3 
Kh5 60.Ra6 Kg6 61.Ke3 Kf5 62.Ra5+ Kg6 63.Kd4 Ng8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Geller, Efim"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[ECO "B07"]
[EventDate "1970.07.14"]
[PlyCount "83"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f3 Bg7 5.Be3 c6 6.Qd2 b5 7.Bd3 Nbd7 8.Nge2 a6 
9.a4 Bb7 10.O-O O-O 11.Kh1 Qc7 12.Ng3 e5 13.dxe5 dxe5 14.Qf2 Rfe8 15.Rfd1 
Nf8 16.Nb1 Ne6 17.Nd2 Nd7 18.c3 Bf8 19.axb5 axb5 20.b4 Rxa1 21.Rxa1 Ra8 
22.Rxa8 Bxa8 23.Nb3 Qd6 24.Qd2 Nf4 25.Bf1 Qxd2 26.Nxd2 Bd6 27.Kg1 Kf8 28.
Nh1 Bb7 29.Nb3 Bc8 30.Nf2 Ke7 31.g3 Ne6 32.Nd3 Bc7 33.Kf2 Nb6 34.Na5 Bd7 
35.Nc5 Nxc5 36.Bxc5+ Ke8 37.Be3 Na4 38.c4 bxc4 39.Nxc4 Ke7 40.Ke1 Be6 41.
Kd2 Bxc4 42.Bxc4 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Hartoch, Robert"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[ECO "A11"]
[EventDate "1970.07.14"]
[PlyCount "71"]

1.c4 Nf6 2.g3 c6 3.b3 d5 4.Bb2 Bf5 5.Nf3 h6 6.Bg2 e6 7.O-O Nbd7 8.d3 Be7 
9.Nbd2 O-O 10.Qc2 Bh7 11.a3 a5 12.Bc3 Qb8 13.Qb2 Bd6 14.Bxf6 Nxf6 15.b4 e5
16.c5 Bc7 17.Ne1 e4 18.Nb3 axb4 19.axb4 Rxa1 20.Qxa1 h5 21.Qc1 Re8 22.dxe4
dxe4 23.Nc2 Nd5 24.Ne3 Nxb4 25.Qc4 Na6 26.Rd1 Qc8 27.h4 Kf8 28.Kh2 Qe6 29.
Bh3 Qxc4 30.Nxc4 f6 31.Nd6 Rd8 32.Nd4 Bg8 33.Nxb7 Rb8 34.Ra1 Be5 35.Rxa6 
Bxd4 36.e3 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Janosevic, Dragoljub"]
[Black "Uhlmann, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C09"]
[EventDate "1970.07.14"]
[PlyCount "28"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 Nc6 5.exd5 exd5 6.Bb5 Bd6 7.O-O cxd4 8.Nb3
Ne7 9.Nbxd4 O-O 10.h3 Bc7 11.Re1 Nxd4 12.Qxd4 Bf5 13.Bg5 f6 14.Bf4 Be4 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Langeweg, Christian"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1970.07.14"]
[PlyCount "34"]

1.Nf3 c5 2.c4 g6 3.d4 cxd4 4.Nxd4 Bg7 5.e4 d6 6.Be2 Nf6 7.Nc3 Nbd7 8.O-O 
O-O 9.Be3 a6 10.Qd2 Nc5 11.f3 Bd7 12.Rac1 Rc8 13.Rfd1 Re8 14.Bf1 Qa5 15.b3
Ne6 16.Nc2 Bc6 17.Nd5 Qxd2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Spassky, Boris"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "C93"]
[EventDate "1970.07.14"]
[PlyCount "90"]

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 h6 10.d4 Re8 11.Nbd2 Bf8 12.Nf1 Bb7 13.Ng3 Na5 14.Bc2 Nc4 15.b3 Nb6 
16.Bd2 c5 17.d5 c4 18.Be3 Bc8 19.Nd2 Bd7 20.bxc4 Rc8 21.cxb5 axb5 22.Ne2 
Nc4 23.Nxc4 Rxc4 24.f3 Qa5 25.Qd2 Rec8 26.Reb1 Be7 27.a4 bxa4 28.Bb6 Qa6 
29.Bd3 Bb5 30.Be3 R4c5 31.c4 Bd7 32.Nc3 Bd8 33.Nb5 Nh5 34.Qb4 Nf4 35.Bf1 
Bb6 36.Nxd6 Rb5 37.cxb5 Bxe3+ 38.Kh2 Qb6 39.Nxc8 Bxc8 40.Ra2 Nh5 41.g4 Qf6
42.gxh5 Qf4+ 43.Kh1 Qg3 44.Rg2 Qxh3+ 45.Rh2 Qg3 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.14"]
[Round "1"]
[White "Tringov, Georgi"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "C98"]
[EventDate "1970.07.14"]
[PlyCount "65"]

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 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 13.dxc5 dxc5 14.Nf1 Be6 15.Ne3 
Rad8 16.Qe2 c4 17.Ng5 Bc5 18.Nd5 Bxd5 19.exd5 Ne7 20.Qxe5 Qxe5 21.Rxe5 
Nexd5 22.Ne4 Nxe4 23.Rxe4 Rfe8 24.Kf1 a5 25.Rxe8+ Rxe8 26.Bd2 g6 27.Rd1 f5
28.Bc1 Nb6 29.Bf4 Kf7 30.g4 fxg4 31.hxg4 Re7 32.b3 Rd7 33.Rxd7+ 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Ciric, Dragoljub"]
[Black "Janosevic, Dragoljub"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1970.07.14"]
[PlyCount "29"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Qc7 6.g3 a6 7.Bg2 Nf6 8.O-O 
Nxd4 9.Qxd4 Bc5 10.Bf4 d6 11.Qd3 Nd7 12.Na4 e5 13.Bd2 b5 14.Nxc5 Nxc5 15.
Qc3 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Csom, Istvan"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "B22"]
[EventDate "1970.07.14"]
[PlyCount "42"]

1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 d6 5.Nf3 Nc6 6.dxc5 dxc5 7.Bb5 Qb6 8.Bc4 
Nc7 9.O-O Be6 10.Na3 g6 11.Ng5 Bg7 12.Bxe6 Nxe6 13.Nc4 Qa6 14.Nxe6 fxe6 
15.Qg4 Nd8 16.Bg5 Nf7 17.Nd6+ exd6 18.Qxe6+ Kf8 19.Be7+ Kg8 20.exd6 Bf8 
21.Rad1 Bxe7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Gligoric, Svetozar"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "E94"]
[EventDate "1970.07.14"]
[PlyCount "83"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 Nbd7 8.O-O Nc5 
9.Qc2 a5 10.Bg5 h6 11.Be3 Ng4 12.Bxc5 dxc5 13.h3 Nf6 14.Nxe5 Nxd5 15.cxd5 
Bxe5 16.f4 Bd4+ 17.Kh2 c6 18.dxc6 bxc6 19.Bc4 Rb8 20.Rae1 Qh4 21.b3 g5 22.
Ne2 Bf2 23.Rd1 gxf4 24.Rd3 Be3 25.Qc3 Kh7 26.Rxe3 fxe3 27.e5 Be6 28.Rf4 
Qg5 29.Bxe6 fxe6 30.Rg4 Qe7 31.Qd3+ Rf5 32.Ng3 Qd8 33.Qxe3 Rg5 34.Rf4 Rb7 
35.Ne4 Rxe5 36.Rf6 Rh5 37.Rxe6 Rf7 38.Nd6 Qc7 39.Kg1 Rg7 40.Qe4+ Kh8 41.
Re8+ Rg8 42.Re7 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Jongsma, Alexander"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "B80"]
[EventDate "1970.07.14"]
[PlyCount "40"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3 Be7 7.Bg2 O-O 8.O-O a6
9.Be3 Qc7 10.Qe2 Nc6 11.Rad1 Bd7 12.h3 b5 13.a3 Rfc8 14.f4 Rab8 15.Nxc6 
Bxc6 16.Bc1 a5 17.Rfe1 b4 18.axb4 axb4 19.Nd5 exd5 20.exd5 Bd7 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Polugaevsky, Lev"]
[Black "Geller, Efim"]
[Result "1-0"]
[ECO "E73"]
[EventDate "1970.07.14"]
[PlyCount "77"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7 7.Qd2 c6 8.Nf3 e5 
9.O-O exd4 10.Nxd4 Nc5 11.Qf4 Qe7 12.Rad1 Ncxe4 13.Nxe4 Qxe4 14.Qxd6 Nd7 
15.Bf3 Qe5 16.Bf4 Qa5 17.b4 Qxa2 18.c5 a6 19.Qc7 Nf6 20.Nxc6 bxc6 21.Bxc6 
Bg4 22.Rd2 Qe6 23.Bxa8 Rxa8 24.f3 Ne8 25.Qb6 Bf5 26.g4 Qc4 27.Qb7 Qxf4 28.
Qxa8 Bd4+ 29.Kh1 Bd7 30.c6 Bxc6 31.Qxc6 Qxd2 32.Qxe8+ Kg7 33.Qe1 Qb2 34.
Qb1 Qe2 35.Qd1 Qb2 36.Qd3 Bc3 37.Rb1 Qa3 38.Qe3 Bxb4 39.Qd4+ 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Ree, Hans"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[ECO "B07"]
[EventDate "1970.07.14"]
[PlyCount "47"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5 Bg7 5.Qd2 h6 6.Be3 Ng4 7.Bf4 Nd7 8.Be2 e5 
9.dxe5 Ngxe5 10.O-O-O Nb6 11.Nf3 Nxf3 12.gxf3 Be6 13.Rhe1 Qd7 14.Bb5 c6 
15.Bf1 Be5 16.Be3 g5 17.f4 gxf4 18.Bxf4 O-O-O 19.Qe3 Qe7 20.Bg3 Qf6 21.f4 
Bxc3 22.Qxc3 Qxc3 23.bxc3 Bc4 24.Bh3+ 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Scholl, Eduard"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "B99"]
[EventDate "1970.07.14"]
[PlyCount "61"]

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 Nxf6 12.g5 Nd7 13.f5 Nc5 14.f6 gxf6 15.gxf6 
Bf8 16.Qh5 b4 17.Nd5 exd5 18.exd5 Bd7 19.Re1+ Kd8 20.Qxf7 Kc8 21.Rg1 Kb7 
22.Ne6 Qc8 23.Nxc5+ dxc5 24.Bh3 Kc7 25.Re6 Qb7 26.Qxd7+ Kxd7 27.Re7+ Kd6 
28.Rxb7 Kxd5 29.Re1 Bh6+ 30.Kb1 Rhe8 31.Rbe7 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.15"]
[Round "2"]
[White "Uhlmann, Wolfgang"]
[Black "Tringov, Georgi"]
[Result "1-0"]
[ECO "D34"]
[EventDate "1970.07.14"]
[PlyCount "63"]

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O 
O-O 9.b3 Ne4 10.Bb2 Bf6 11.Na4 cxd4 12.Nxd4 Bd7 13.Rc1 Nxd4 14.Bxd4 Bc6 
15.Nc3 Re8 16.e3 Qe7 17.Bxf6 Nxf6 18.Qd4 Red8 19.Rc2 Ne4 20.Rd1 h5 21.h4 
g5 22.hxg5 Qxg5 23.b4 a6 24.a3 Qe7 25.Rdc1 h4 26.gxh4 Rd6 27.a4 Rg6 28.b5 
axb5 29.axb5 Nxc3 30.bxc6 Ne4 31.cxb7 Qxb7 32.Rc7 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Donner, Jan"]
[Black "Uhlmann, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D79"]
[EventDate "1970.07.14"]
[PlyCount "28"]

1.d4 Nf6 2.c4 g6 3.g3 c6 4.Bg2 d5 5.cxd5 cxd5 6.Nf3 Bg7 7.O-O O-O 8.Nc3 
Ne4 9.Ne5 Nxc3 10.bxc3 Nd7 11.Nxd7 Qxd7 12.Qb3 Rd8 13.e4 dxe4 14.Bxe4 Qc7 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Geller, Efim"]
[Black "Csom, Istvan"]
[Result "1-0"]
[ECO "B06"]
[EventDate "1970.07.14"]
[PlyCount "115"]

1.Nf3 g6 2.d4 Bg7 3.e4 d6 4.c3 Nf6 5.Nbd2 c6 6.Be2 O-O 7.O-O Na6 8.Re1 Nc7
9.Bf1 d5 10.e5 Nfe8 11.h3 Ne6 12.b4 N8c7 13.Nb3 b6 14.a4 Ba6 15.Bxa6 Nxa6 
16.Be3 Nac7 17.Nc1 Qd7 18.Nd3 f5 19.exf6 exf6 20.Qb3 a6 21.a5 b5 22.Ra2 
Rfe8 23.Rae2 Re7 24.Qd1 Rae8 25.Nd2 Bf8 26.Nb3 Qc8 27.Qd2 Nd8 28.Nbc5 Nf7 
29.Bf4 Ne6 30.Bg3 Kg7 31.Re3 Kg8 32.Qd1 Nxc5 33.Rxe7 Rxe7 34.bxc5 Ng5 35.
f3 Kf7 36.Nb4 Rxe1+ 37.Qxe1 Be7 38.Bf4 Ne6 39.Bg3 Bd8 40.Qa1 Qb7 41.Bd6 
Ng7 42.Kf2 Ne8 43.Qa3 Ng7 44.Ke2 Ne6 45.Qa2 Qa8 46.Kd1 Qb7 47.Kc2 Qa8 48.
Kb3 Qb7 49.g4 Ng7 50.f4 Qc8 51.Qe2 Qb7 52.h4 h6 53.f5 gxf5 54.gxf5 Bxa5 
55.Nxc6 Qxc6 56.Qe7+ Kg8 57.Qf8+ Kh7 58.Qxf6 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Hartoch, Robert"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "E73"]
[EventDate "1970.07.14"]
[PlyCount "35"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7 7.Qd2 e5 8.Nf3 c6 
9.O-O exd4 10.Nxd4 Nc5 11.Qf4 Qe7 12.Rad1 Qe5 13.Bf3 Nfd7 14.Qh4 Bf6 15.
Bxf6 Nxf6 16.Rfe1 Re8 17.Re3 a5 18.Be2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Hort, Vlastimil"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[ECO "A15"]
[EventDate "1970.07.14"]
[PlyCount "33"]

1.c4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 e6 5.O-O Be7 6.b3 O-O 7.Nc3 d5 8.Ne5 Nbd7
9.d4 c5 10.Bf4 Rc8 11.Rc1 cxd4 12.Qxd4 Bc5 13.Qd1 Bb4 14.Nb5 Nxe5 15.Bxe5 
a6 16.Nc3 Nd7 17.Bf4 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Janosevic, Dragoljub"]
[Black "Ree, Hans"]
[Result "1-0"]
[ECO "C96"]
[EventDate "1970.07.14"]
[PlyCount "83"]

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 Na5 10.Bc2 c5 11.d4 Nd7 12.Nbd2 cxd4 13.cxd4 Nc6 14.Nb3 a5 15.Be3 Nb6
16.dxe5 Nxe5 17.Nbd4 Nbc4 18.Bc1 Qb6 19.b3 Nxf3+ 20.Nxf3 Ne5 21.Be3 Qa6 
22.Nd4 Bf6 23.Rc1 Bd7 24.Bb1 Rac8 25.Qe2 a4 26.f4 Ng6 27.Qd2 Rfe8 28.Nf3 
axb3 29.axb3 Nf8 30.Bd4 Bxd4+ 31.Nxd4 Rxc1 32.Rxc1 Rc8 33.Rd1 Qa3 34.Kh2 
Rd8 35.f5 Rc8 36.Bd3 Qc5 37.Nf3 Qc3 38.b4 Qf6 39.Bf1 Re8 40.Qf4 Qb2 41.Rd4
Bc6 42.Bd3 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Langeweg, Christian"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[ECO "A43"]
[EventDate "1970.07.14"]
[PlyCount "26"]

1.Nf3 g6 2.d4 Bg7 3.e4 c5 4.d5 d6 5.Be2 Nf6 6.Nc3 Na6 7.O-O Nc7 8.Nd2 Bd7 
9.a4 a6 10.a5 Nb5 11.Ncb1 O-O 12.c3 Qc7 13.Qc2 e6 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Spassky, Boris"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "C98"]
[EventDate "1970.07.14"]
[PlyCount "88"]

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 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 13.d5 Nd8 14.c4 Bd7 15.Bd3 g6 16.
Nf1 Nh5 17.Bh6 Ng7 18.g4 f6 19.Ng3 Nf7 20.Be3 Rfb8 21.b3 b4 22.a3 a5 23.a4
Kf8 24.Nh2 Ke8 25.f4 exf4 26.Bxf4 Kd8 27.Ra2 Kc8 28.Rf2 Kb7 29.Bc1 Rf8 30.
Ref1 Rg8 31.Bb2 Ne5 32.Nf3 Raf8 33.Kh2 Qd8 34.Be2 Nf7 35.Ne1 Ne5 36.Nd3 
Ka8 37.g5 Nxd3 38.Bxd3 fxg5 39.Rf7 Rxf7 40.Rxf7 Nh5 41.Nxh5 gxh5 42.e5 Be8
43.Rxh7 Rf8 44.Kg2 g4 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.16"]
[Round "3"]
[White "Tringov, Georgi"]
[Black "Ciric, Dragoljub"]
[Result "1/2-1/2"]
[ECO "C85"]
[EventDate "1970.07.14"]
[PlyCount "28"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6 dxc6 7.d3 Bg4 8.h3 
Bxf3 9.Qxf3 Nd7 10.Qg3 Bf6 11.Nc3 Qe7 12.f4 exf4 13.Bxf4 Be5 14.Kh1 O-O 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Ciric, Dragoljub"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "C93"]
[EventDate "1970.07.14"]
[PlyCount "98"]

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 h6 10.d4 Re8 11.Nbd2 Bf8 12.Nf1 Bd7 13.Ng3 Na5 14.Bc2 c5 15.b3 Nc6 
16.d5 Ne7 17.Nh2 Ng6 18.Nf5 Nf4 19.c4 g6 20.Ng3 Bg7 21.Rb1 h5 22.Qf3 h4 
23.Ne2 g5 24.Nc3 Rb8 25.Bd2 bxc4 26.bxc4 Rb4 27.Bb3 Qc7 28.Nd1 a5 29.Bxb4 
cxb4 30.Ne3 a4 31.Bc2 Rb8 32.Nhg4 Nxg4 33.hxg4 Qc5 34.g3 hxg3 35.fxg3 Qd4 
36.Red1 Bxg4 37.Rxd4 Bxf3 38.Rd2 Nh3+ 39.Kh2 g4 40.Nf5 Ng5 41.Nxd6 Bf8 42.
c5 Bxd6 43.cxd6 Nxe4 44.Bxe4 Bxe4 45.Rc1 Rd8 46.Rc4 f5 47.Rxb4 a3 48.Ra4 
Rxd6 49.Rxa3 Kf7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Csom, Istvan"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[ECO "B19"]
[EventDate "1970.07.14"]
[PlyCount "32"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nf3 Nd7 7.h4 h6 8.h5 Bh7
9.Bd3 Bxd3 10.Qxd3 Ngf6 11.Bd2 e6 12.O-O-O Qc7 13.Qe2 c5 14.Rh4 Be7 15.
dxc5 Nxc5 16.Qb5+ Qd7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Gligoric, Svetozar"]
[Black "Geller, Efim"]
[Result "1/2-1/2"]
[ECO "E92"]
[EventDate "1970.07.14"]
[PlyCount "28"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Nf3 e5 7.d5 a5 8.O-O Na6 9.
Bg5 h6 10.Bh4 Bd7 11.Ne1 Nc5 12.f3 b6 13.Nd3 Qb8 14.Be1 Ne8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Janosevic, Dragoljub"]
[Black "Tringov, Georgi"]
[Result "0-1"]
[ECO "E82"]
[EventDate "1970.07.14"]
[PlyCount "76"]

1.c4 g6 2.Nc3 Bg7 3.d4 Nf6 4.e4 d6 5.f3 O-O 6.Be3 b6 7.Nge2 c5 8.d5 e6 9.
Ng3 exd5 10.cxd5 Ba6 11.Bxa6 Nxa6 12.O-O Nc7 13.a4 Re8 14.f4 Nxe4 15.Ncxe4
f5 16.Qd2 Qe7 17.Rae1 fxe4 18.Re2 Rf8 19.Kh1 Qf7 20.f5 Nxd5 21.Nxe4 Nxe3 
22.Qxe3 d5 23.Ng5 Qd7 24.Qh3 h6 25.Ne6 Rxf5 26.Rxf5 gxf5 27.g4 fxg4 28.
Qxg4 Re8 29.h3 Re7 30.Qg6 Qe8 31.Qg4 Qf7 32.Re1 h5 33.Qe2 Qf5 34.Kg2 c4 
35.h4 Qg4+ 36.Qxg4 hxg4 37.Kg3 Bxb2 38.Kxg4 c3 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Jongsma, Alexander"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "E61"]
[EventDate "1970.07.14"]
[PlyCount "33"]

1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 c5 5.e3 O-O 6.Be2 cxd4 7.Nxd4 Nc6 8.O-O 
d6 9.b3 Bd7 10.Bb2 a6 11.Qd2 Rb8 12.Nf3 Bg4 13.Rfd1 Qa5 14.h3 Bxf3 15.Bxf3
Rfc8 16.Rac1 b5 17.cxb5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Ree, Hans"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "A24"]
[EventDate "1970.07.14"]
[PlyCount "68"]

1.c4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.d3 e5 7.O-O Nbd7 8.Rb1 a5 
9.a3 c6 10.Nd2 Nb6 11.b4 axb4 12.axb4 d5 13.cxd5 cxd5 14.Nb3 d4 15.Ne4 
Nxe4 16.dxe4 Na4 17.Bd2 b6 18.Nc1 Be6 19.Nd3 Nc3 20.Bxc3 dxc3 21.Qc2 Qd4 
22.Ra1 Bc4 23.Rfb1 Bxd3 24.exd3 Rxa1 25.Rxa1 b5 26.Rb1 Rc8 27.Bf3 Bf8 28.
Bd1 Bxb4 29.Qe2 Rc6 30.Qe3 Bc5 31.Qxd4 Bxd4 32.Bb3 c2 33.Rc1 Rc3 34.Bxc2 
b4 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Scholl, Eduard"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[ECO "B57"]
[EventDate "1970.07.14"]
[PlyCount "84"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6 7.Nde2 e6 8.O-O 
Be7 9.Bb3 O-O 10.Kh1 Na5 11.Bg5 Qc5 12.f4 b5 13.Ng3 Bb7 14.Nh5 Kh8 15.a3 
Rae8 16.Bxf6 gxf6 17.f5 Nxb3 18.cxb3 Qe5 19.Qd2 Rg8 20.Rae1 Bd8 21.Re2 Rg5
22.Nf4 Reg8 23.Nd3 Qd4 24.Nxb5 Qb6 25.a4 a6 26.Nc3 Qxb3 27.fxe6 fxe6 28.
Nf4 Be7 29.Rf3 Qc4 30.Rh3 e5 31.b3 Qc8 32.Nfd5 Qxh3 33.Qxg5 Rxg5 34.gxh3 
Bd8 35.Rf2 Kg7 36.b4 Kf7 37.Rg2 Rh5 38.Rg3 f5 39.Kg2 fxe4 40.Rg4 Ke6 41.
Ne3 d5 42.Rg7 Rg5+ 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.17"]
[Round "4"]
[White "Uhlmann, Wolfgang"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "D26"]
[EventDate "1970.07.14"]
[PlyCount "40"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.Qe2 cxd4 7.exd4 Be7 8.O-O 
O-O 9.Nc3 a6 10.Bg5 b5 11.Bb3 Bb7 12.Rfd1 Nbd7 13.d5 exd5 14.Nxd5 Bxd5 15.
Bxd5 Nxd5 16.Rxd5 Bxg5 17.Nxg5 h6 18.Qd2 hxg5 19.Rxd7 Qf6 20.Rd1 Rae8 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Donner, Jan"]
[Black "Janosevic, Dragoljub"]
[Result "1/2-1/2"]
[ECO "A79"]
[EventDate "1970.07.14"]
[PlyCount "61"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Be2 e6 7.Nf3 exd5 8.cxd5 O-O 
9.O-O Re8 10.Nd2 Na6 11.f3 Nc7 12.a4 b6 13.Nc4 Ba6 14.Na3 Bxe2 15.Nxe2 Nd7
16.Kh1 Ne5 17.Nc3 f5 18.Nab5 a6 19.Nxc7 Qxc7 20.f4 Ng4 21.exf5 gxf5 22.Qd3
Re1 23.Qf3 Qe7 24.Bd2 Qh4 25.h3 Rxa1 26.Rxa1 Re8 27.Rf1 Bd4 28.Nd1 Nf6 29.
Qd3 Ne4 30.Be1 Qh5 31.Nc3 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Geller, Efim"]
[Black "Jongsma, Alexander"]
[Result "1-0"]
[ECO "A43"]
[EventDate "1970.07.14"]
[PlyCount "63"]

1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.d5 d6 5.c4 e5 6.Be2 Ne7 7.Nc3 Nd7 8.O-O O-O 9.
Rb1 h6 10.Nb5 Nf6 11.Nd2 a6 12.Nc3 Bd7 13.b4 b6 14.a4 Qc7 15.Ba3 Rfb8 16.
a5 cxb4 17.axb6 Rxb6 18.Bxb4 a5 19.Ba3 Rxb1 20.Qxb1 Nc8 21.Nb5 Bxb5 22.
cxb5 Nd7 23.Rc1 Nc5 24.Nc4 Bf8 25.b6 Qb7 26.Bg4 f6 27.Bxc5 dxc5 28.Bxc8 
Rxc8 29.Nxa5 Qa6 30.Nc6 Qb7 31.Qb5 Ra8 32.Na5 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Hartoch, Robert"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "E74"]
[EventDate "1970.07.14"]
[PlyCount "124"]

1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 d6 5.e4 Nf6 6.Be2 O-O 7.Bg5 a6 8.a4 Qa5 9.
Bd2 e6 10.Nf3 exd5 11.cxd5 Re8 12.Qc2 Bg4 13.O-O Qc7 14.h3 Bxf3 15.Bxf3 
Nbd7 16.a5 Re7 17.Ra4 b5 18.axb6 Nxb6 19.Ra2 Nc4 20.Bf4 Ne5 21.Be2 c4 22.
Bxe5 Rxe5 23.Ra4 Nd7 24.Rxc4 Qd8 25.Na4 Re8 26.Rc6 Nb8 27.Rc7 Nd7 28.Rc6 
Nb8 29.Rb6 Bd4 30.Rb4 Ba7 31.Rb7 Nd7 32.Bxa6 Nc5 33.Nxc5 Bxc5 34.Bb5 Re7 
35.Rxe7 Qxe7 36.Qc4 Rc8 37.Kh1 Qd8 38.Qe2 Qa5 39.f4 Bd4 40.Bc4 Qb4 41.b3 
Re8 42.Qf3 Qc3 43.Qxc3 Bxc3 44.Bd3 f6 45.g3 Ra8 46.Kg2 Ra1 47.Bb1 Ra3 48.
Bc2 Bd4 49.Rd1 Bc5 50.Kf3 Ra2 51.Rd2 Kf8 52.h4 Ra1 53.Bd1 Ke7 54.g4 h6 55.
Ke2 Rc1 56.g5 fxg5 57.hxg5 hxg5 58.fxg5 Rc3 59.Rd3 Rxd3 60.Kxd3 Bf2 61.Bg4
Bh4 62.Kc4 Bxg5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Hort, Vlastimil"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[ECO "E82"]
[EventDate "1970.07.14"]
[PlyCount "82"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6 7.Bd3 a6 8.Nge2 c5 9.
e5 Nfd7 10.exd6 exd6 11.Qd2 Nc6 12.Be4 Bb7 13.O-O-O Nf6 14.Bxc6 Bxc6 15.
Bg5 Rc8 16.d5 Bd7 17.Ng3 Re8 18.Qf4 Re5 19.Nce4 Rxg5 20.Qxg5 b5 21.Nxd6 
Rb8 22.Nge4 h6 23.Qe3 Nxe4 24.Nxe4 bxc4 25.Rd2 Qa5 26.Kb1 c3 27.Rc2 Bd4 
28.Qe1 Qa3 29.Nxc3 Bf5 30.Ka1 Rxb2 31.Rxb2 Bxc3 32.Qc1 c4 33.d6 Bf6 34.Rd1
c3 35.Rc2 Qa4 36.d7 Bxd7 37.g4 Be6 38.Re1 Bb3 39.Ree2 Bxa2 40.Qxh6 Bc4+ 
41.Kb1 Bxe2 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Langeweg, Christian"]
[Black "Uhlmann, Wolfgang"]
[Result "0-1"]
[ECO "D73"]
[EventDate "1970.07.14"]
[PlyCount "50"]

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 d5 5.cxd5 O-O 6.Bg2 Nxd5 7.e4 Nb6 8.Nc3 
Bg4 9.Ne2 c5 10.d5 e6 11.h3 Bxf3 12.Bxf3 exd5 13.exd5 N8d7 14.O-O Nc4 15.
Qc2 Nd6 16.Bg2 Re8 17.a4 Rc8 18.g4 c4 19.Be3 Nc5 20.Ra3 Nd3 21.Rb1 a6 22.
b4 Qd7 23.Nc1 Ne1 24.Qd1 Nxg2 25.Kxg2 c3 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Polugaevsky, Lev"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]
[ECO "D35"]
[EventDate "1970.07.14"]
[PlyCount "50"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 d5 4.d4 Nbd7 5.cxd5 exd5 6.Bf4 c6 7.e3 Be7 8.h3 
Nf8 9.Bd3 Ng6 10.Bh2 Bd6 11.Bxd6 Qxd6 12.Qc2 O-O 13.g4 Be6 14.O-O-O c5 15.
dxc5 Qxc5 16.Kb1 Rfe8 17.Nd4 Ne5 18.Bb5 Rec8 19.f4 Nc4 20.Bxc4 dxc4 21.e4 
Rd8 22.Na4 Qc7 23.f5 Bd7 24.Nc3 Bc6 25.Qd2 Re8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Spassky, Boris"]
[Black "Ciric, Dragoljub"]
[Result "1-0"]
[ECO "E07"]
[EventDate "1970.07.14"]
[PlyCount "57"]

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 Be7 5.Bg2 O-O 6.O-O c6 7.b3 Nbd7 8.Bb2 b6 
9.Nbd2 Bb7 10.Rc1 Rc8 11.e3 c5 12.Qe2 Rc7 13.cxd5 Bxd5 14.e4 Bb7 15.e5 Nd5
16.Nc4 Qa8 17.Nd6 Bxd6 18.exd6 Rc6 19.dxc5 bxc5 20.Ng5 Rxd6 21.Rfd1 Ra6 
22.Qe4 f5 23.Qc4 Qe8 24.Re1 Rxa2 25.Rxe6 Qa8 26.Bxd5 Bxd5 27.Qh4 h6 28.
Qxh6 Nf6 29.Rxf6 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.18"]
[Round "5"]
[White "Tringov, Georgi"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "C41"]
[EventDate "1970.07.14"]
[PlyCount "50"]

1.e4 d6 2.d4 Nf6 3.Nc3 e5 4.Nf3 Nbd7 5.Bc4 Be7 6.dxe5 Nxe5 7.Nxe5 dxe5 8.
Qxd8+ Bxd8 9.Be3 c6 10.f3 Bb6 11.Bg5 Nd7 12.O-O-O f6 13.Bd2 Nc5 14.b4 Ne6 
15.b5 Ba5 16.bxc6 bxc6 17.Na4 Bxd2+ 18.Rxd2 Ke7 19.Rhd1 Rd8 20.Bxe6 Rxd2 
21.Rxd2 Bxe6 22.Nc5 Rb8 23.Rd3 Rb5 24.Nxe6 Kxe6 25.Rd8 Rb7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Ciric, Dragoljub"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "B57"]
[EventDate "1970.07.14"]
[PlyCount "51"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6 7.Nb3 e6 8.O-O 
Be7 9.Kh1 O-O 10.f4 Rd8 11.Bd3 a6 12.Qf3 Qc7 13.Bd2 b5 14.a3 b4 15.axb4 
Nxb4 16.Nb5 Qb8 17.Bxb4 axb5 18.Rae1 Re8 19.Nd4 Bd7 20.c3 Qb7 21.h3 Rab8 
22.g4 e5 23.Ne2 Bc6 24.Ng3 exf4 25.Qxf4 Bf8 26.g5 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Gligoric, Svetozar"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "E56"]
[EventDate "1970.07.14"]
[PlyCount "216"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
Nc6 9.a3 Ba5 10.Na4 cxd4 11.exd4 Ne7 12.Nc5 Nf5 13.Bf4 Bc7 14.Be5 b6 15.
Na6 Bd6 16.Qe2 Bb7 17.Rad1 Nd5 18.Bg3 Bxg3 19.hxg3 Qf6 20.Qe5 Rac8 21.Bd3 
Rfd8 22.Rfe1 Nde7 23.Nb4 Bxf3 24.gxf3 Nxd4 25.Qxf6 gxf6 26.Kg2 Nb3 27.Ba6 
Rxd1 28.Rxd1 Rc7 29.Rd8+ Kg7 30.Bb5 a5 31.Nd3 Nd5 32.Ba4 Nd4 33.f4 Rc4 34.
Bd1 Nf5 35.Rb8 Rd4 36.Be2 h5 37.Kh3 a4 38.Ra8 h4 39.g4 Nd6 40.Kxh4 Nxf4 
41.Nxf4 Rxf4 42.Kg3 Rd4 43.Kf3 f5 44.gxf5 Nxf5 45.Bb5 Rd2 46.Rxa4 Rxb2 47.
Bd3 Ne7 48.Rg4+ Kf8 49.a4 Nc6 50.Kg2 Ne5 51.Rg3 Nd7 52.Bb5 Nc5 53.Bc6 Ke7 
54.Ra3 Kd6 55.Bf3 f5 56.Kf1 Rb1+ 57.Kg2 Rb2 58.Ra1 Nb3 59.Rd1+ Ke7 60.Bc6 
Nc5 61.Kg3 Kf6 62.Rd8 Rb3+ 63.Kg2 Kg5 64.Bb5 Rb4 65.Rd6 Kf4 66.Rxb6 Nxa4 
67.Rc6 Nb2 68.Be2 e5 69.Rc2 e4 70.Rd2 Nd3 71.Bxd3 Rd4 72.Bxe4 Rxd2 73.Bb7 
Rd3 74.Bc6 Rc3 75.Bd5 Kg4 76.Be6 Rc5 77.Bb3 Kf4 78.Bd1 Rc6 79.Bh5 Rh6 80.
Bd1 Rg6+ 81.Kf1 Rd6 82.Bh5 Rd7 83.Kg2 Rg7+ 84.Kf1 Ke4 85.Bd1 Rd7 86.Bh5 
Rh7 87.Be8 Rh6 88.Ba4 Rd6 89.Kg2 Kf4 90.Be8 Rb6 91.Ba4 Ra6 92.Bd1 Rg6+ 93.
Kf1 Rd6 94.Bh5 Rh6 95.Bf7 Ke4 96.Bb3 Rc6 97.Kg2 Rc1 98.Bf7 Rc7 99.Bh5 Rg7+
100.Kf1 Rg8 101.Bd1 Rd8 102.Ba4 Rc8 103.Bd7 Rc5 104.Ke2 f4 105.Be8 f3+ 
106.Kd2 Rd5+ 107.Kc2 Kf4 108.Bf7 Rg5 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Janosevic, Dragoljub"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "B82"]
[EventDate "1970.07.14"]
[PlyCount "52"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Nxc6 bxc6 8.Bd3 
Be7 9.O-O O-O 10.Qe2 d5 11.e5 Nd7 12.f5 exf5 13.Bxf5 Nc5 14.Qg4 Bxf5 15.
Rxf5 Rb8 16.a3 Qc8 17.Bh6 Ne6 18.Raf1 Rxb2 19.R5f3 Qc7 20.Kh1 Rxc2 21.Nd1 
Rc4 22.Qg3 Bh4 23.Qh3 gxh6 24.Ne3 Ng5 25.Qf5 Nxf3 26.Nxc4 dxc4 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Jongsma, Alexander"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[ECO "A20"]
[EventDate "1970.07.14"]
[PlyCount "42"]

1.c4 e5 2.Nf3 Nc6 3.d4 e4 4.Nfd2 f5 5.Nc3 Nf6 6.e3 g6 7.Rb1 a5 8.c5 d5 9.
cxd6 cxd6 10.Nc4 d5 11.Ne5 Be6 12.Bb5 Rc8 13.Qa4 Qb6 14.Bd2 Bd6 15.Ne2 O-O
16.Nf4 Bf7 17.Bc3 Na7 18.Bd7 Rxc3 19.Nxf7 Rxf7 20.Nxd5 Nxd5 21.Be6 Nf6 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Ree, Hans"]
[Black "Csom, Istvan"]
[Result "1-0"]
[ECO "A21"]
[EventDate "1970.07.14"]
[PlyCount "85"]

1.c4 e5 2.Nc3 d6 3.Nf3 f5 4.d4 e4 5.Nd2 Nf6 6.e3 g6 7.b4 Bg7 8.Bb2 c6 9.
Qb3 Nbd7 10.Be2 Qe7 11.c5 d5 12.b5 O-O 13.g3 Qe6 14.a4 a6 15.bxa6 bxa6 16.
a5 g5 17.Na4 f4 18.Nb6 Rb8 19.gxf4 gxf4 20.exf4 Ne8 21.Qg3 Qf6 22.Nb3 Qxf4
23.Qxf4 Rxf4 24.Bc1 Rf7 25.Rg1 Kf8 26.Bh5 Ndf6 27.Bxf7 Kxf7 28.Bf4 Rb7 29.
Nxc8 Rxb3 30.Na7 Nh5 31.Be3 Nc7 32.Nxc6 Ne6 33.O-O-O Rc3+ 34.Kb2 Rc4 35.
Rc1 Rxc1 36.Rxc1 Nhf4 37.Ka3 Ne2 38.Rb1 Bxd4 39.Rb7+ Kf6 40.Nxd4 N2xd4 41.
Bxd4+ Nxd4 42.Rxh7 Nb5+ 43.Kb2 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Scholl, Eduard"]
[Black "Geller, Efim"]
[Result "1/2-1/2"]
[ECO "C88"]
[EventDate "1970.07.14"]
[PlyCount "70"]

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 b4 
9.d4 d6 10.h3 exd4 11.Nxd4 Na5 12.Ba2 c5 13.Nb3 Nc6 14.N1d2 Be6 15.Nf3 d5 
16.e5 Nd7 17.c3 Rb8 18.Bf4 Nb6 19.Nbd2 bxc3 20.bxc3 d4 21.Ne4 Nd5 22.Bd2 
dxc3 23.Nxc3 Nxc3 24.Bxc3 Qxd1 25.Rexd1 Rfd8 26.Bxe6 fxe6 27.Rxd8+ Rxd8 
28.Nd2 Nxe5 29.Re1 Bf6 30.Bxe5 Bxe5 31.Rxe5 Rxd2 32.Rxe6 a5 33.Ra6 c4 34.
Rxa5 c3 35.Rc5 c2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Tringov, Georgi"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B99"]
[EventDate "1970.07.14"]
[PlyCount "82"]

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 Nxf6 12.g5 Nd7 13.f5 Nc5 14.f6 gxf6 15.gxf6 
Bf8 16.Qh5 Bd7 17.Bh3 b4 18.Nce2 O-O-O 19.Qxf7 Bh6+ 20.Kb1 Rdf8 21.Qe7 Re8
22.Qf7 Ref8 23.Qh5 Rxf6 24.Rhf1 Rhf8 25.Rxf6 Rxf6 26.Qh4 Rg6 27.Nb3 Bg5 
28.Qxh7 Rh6 29.Qg7 Nxe4 30.Ng3 Rxh3 31.Nxe4 Rxh2 32.Nd4 Bd8 33.Qg3 Rh5 34.
Nxd6+ Kb8 35.Nb3 Be7 36.Qg8+ Ka7 37.Nc4 Bb5 38.Qg1+ Kb8 39.Qg8+ Ka7 40.
Qg1+ Kb8 41.Qg8+ Ka7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.20"]
[Round "6"]
[White "Uhlmann, Wolfgang"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[ECO "E90"]
[EventDate "1970.07.14"]
[PlyCount "147"]

1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 d6 5.e4 Nf6 6.Nf3 O-O 7.Bg5 h6 8.Bf4 g5 9.
Bg3 Nh5 10.Be2 Nxg3 11.hxg3 e6 12.dxe6 Bxe6 13.Qd2 Nc6 14.Rd1 Qa5 15.a3 a6
16.Nd5 Qxd2+ 17.Rxd2 Bxd5 18.exd5 Ne7 19.Kd1 Rfe8 20.Nh2 Kf8 21.Ng4 Ng8 
22.Bd3 Re7 23.Ne3 Rae8 24.Nf5 Rd7 25.Kc2 Rb8 26.f4 Re8 27.Rf2 g4 28.Re2 
Rxe2+ 29.Bxe2 Nf6 30.b4 cxb4 31.axb4 h5 32.Ra1 Kg8 33.Ra5 Bf8 34.b5 axb5 
35.Rxb5 Rc7 36.Bd3 Nd7 37.Rb1 Nf6 38.Kd2 Nd7 39.Nd4 Nf6 40.Ra1 Rc8 41.Ra7 
Rb8 42.Bf5 Bg7 43.Nb5 Ne8 44.Kc2 Kf8 45.Kb3 Bf6 46.Ra2 Bd8 47.Ra1 Bb6 48.
Rh1 Bf2 49.Rxh5 Bxg3 50.Bxg4 Bxf4 51.Rf5 Be5 52.Bh5 f6 53.Rf3 Ng7 54.Bg6 
Ke7 55.Kb4 Ra8 56.g4 Ra2 57.Rh3 Rg2 58.Rh7 Kf8 59.Rh8+ Ke7 60.Rg8 f5 61.
gxf5 Rf2 62.Rb8 Nxf5 63.Rxb7+ Kd8 64.Bxf5 Rxf5 65.Na7 Rf2 66.Kb5 Rc2 67.
Rh7 Bg3 68.Nc6+ Kc8 69.Nd4 Rc1 70.Nf5 Bf4 71.Rh4 Bg5 72.Rg4 Bd8 73.Kc6 Kb8
74.Nxd6 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Csom, Istvan"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "A07"]
[EventDate "1970.07.14"]
[PlyCount "125"]

1.g3 d5 2.Nf3 c6 3.Bg2 Nf6 4.O-O Bg4 5.d3 Nbd7 6.c4 dxc4 7.dxc4 Bxf3 8.
exf3 Nc5 9.Bg5 e6 10.Nc3 Be7 11.Qe2 Qd3 12.Rfd1 Qxe2 13.Nxe2 a5 14.Be3 O-O
15.Rd2 Rfd8 16.Rad1 Rxd2 17.Rxd2 Kf8 18.Nc3 Ke8 19.Bf1 a4 20.Be2 Nfd7 21.
Kf1 f5 22.Bd1 Bf6 23.Ne2 g6 24.Nc1 Be7 25.Nd3 Nxd3 26.Rxd3 Ne5 27.Rc3 a3 
28.bxa3 Rxa3 29.Rxa3 Bxa3 30.Be2 Nd7 31.Bd1 Bc5 32.Bd2 Ke7 33.Ke2 Kd6 34.
Bc3 e5 35.Bc2 Ke6 36.Bd2 Kf6 37.Bc3 Bd4 38.Bb4 Nb6 39.Bb3 Nc8 40.Ba5 Ke7 
41.Bb4+ c5 42.Ba5 Nd6 43.Bc7 Ne8 44.Ba5 Ng7 45.Kf1 Ne6 46.Kg2 Bb2 47.Ba4 
Nd4 48.Bd2 Ba3 49.Be3 Ne6 50.h3 f4 51.Bd2 g5 52.Bc3 Kd6 53.Bc2 h6 54.Be4 
b6 55.Kf1 Bb4 56.Bb2 Nd4 57.h4 gxh4 58.gxh4 Ke6 59.Bd5+ Kf6 60.Be4 h5 61.
a4 Ba5 62.Kg2 Ne2 63.Kf1 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Donner, Jan"]
[Black "Ree, Hans"]
[Result "1-0"]
[ECO "E52"]
[EventDate "1970.07.14"]
[PlyCount "81"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 b6 7.O-O Bb7 8.a3 Bd6 
9.b4 dxc4 10.Bxc4 Nbd7 11.Bb2 a5 12.bxa5 Rxa5 13.Qe2 e5 14.Nb5 e4 15.Ne5 
Be7 16.Bc3 Ra8 17.Bb4 Nb8 18.Qb2 Nc6 19.Nxc6 Bxc6 20.Rac1 Bxb4 21.axb4 Qd7
22.Nxc7 Ra7 23.b5 Bb7 24.Be2 Ra5 25.Rc2 Qf5 26.Rfc1 h5 27.h3 g5 28.Ra1 
Rxa1+ 29.Qxa1 g4 30.h4 Bd5 31.g3 Rc8 32.Qa6 Rb8 33.Qa7 Rb7 34.Qa8+ Kg7 35.
Nxd5 Qxd5 36.Rc6 Qd7 37.Bc4 Ne8 38.Kg2 Ra7 39.Qb8 Ra1 40.Qe5+ f6 41.Qxh5 
1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Geller, Efim"]
[Black "Uhlmann, Wolfgang"]
[Result "0-1"]
[ECO "C09"]
[EventDate "1970.07.14"]
[PlyCount "93"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6 6.Bb5 Bd6 7.O-O cxd4 8.Nb3
Ne7 9.Nbxd4 O-O 10.Bg5 f6 11.Be3 Ne5 12.Re1 a6 13.Bf1 Kh8 14.h3 Bd7 15.c3 
Rc8 16.a4 Re8 17.Nxe5 fxe5 18.Nf3 h6 19.a5 Rc6 20.Bb6 Qb8 21.Rc1 Rf8 22.c4
e4 23.Nd2 Rxb6 24.axb6 Bc5 25.Re2 Rxf2 26.Rxf2 e3 27.cxd5 exf2+ 28.Kh1 Nf5
29.Ne4 Bxb6 30.Qf3 Qe5 31.Bd3 Qxd5 32.Nc5 Qxf3 33.gxf3 Bxc5 34.Rxc5 Ne3 
35.Rc1 Kg8 36.Kh2 Bb5 37.Rc8+ Kf7 38.Kg3 Bxd3 39.Rc7+ Kf6 40.Kxf2 Nd1+ 41.
Kg3 Nxb2 42.Rxb7 Nc4 43.h4 a5 44.Rd7 Bc2 45.Rc7 Bb3 46.Kf4 a4 47.Rb7 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Hartoch, Robert"]
[Black "Ciric, Dragoljub"]
[Result "1/2-1/2"]
[ECO "E04"]
[EventDate "1970.07.14"]
[PlyCount "22"]

1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 5.Qa4+ Bd7 6.Qxc4 c5 7.O-O Nc6 8.d4 
cxd4 9.Nxd4 Rc8 10.Nc3 Be7 11.Nxc6 Bxc6 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Hort, Vlastimil"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "D80"]
[EventDate "1970.07.14"]
[PlyCount "50"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Bh4 c5 6.cxd5 Nxc3 7.bxc3 Qxd5 8.e3 
cxd4 9.Qxd4 Qxd4 10.cxd4 e6 11.Rb1 Be7 12.Bg3 Nc6 13.Nf3 O-O 14.Nd2 b6 15.
Bb5 Bb7 16.O-O Rac8 17.Rfc1 Rfd8 18.a4 f6 19.f3 Kf7 20.Ne4 f5 21.Nd2 Na5 
22.Bc7 Rd5 23.Be5 Rdd8 24.Bc7 Rd5 25.Be5 Rdd8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Langeweg, Christian"]
[Black "Janosevic, Dragoljub"]
[Result "1/2-1/2"]
[ECO "A79"]
[EventDate "1970.07.14"]
[PlyCount "44"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Be2 O-O 7.Nf3 e6 8.O-O exd5 
9.cxd5 Re8 10.Nd2 Na6 11.f3 Nc7 12.a4 b6 13.Kh1 Rb8 14.Bb5 Nxb5 15.axb5 
Qc7 16.Nc4 Nd7 17.Bf4 Ne5 18.Bxe5 dxe5 19.d6 Qb7 20.Qa4 Be6 21.Rfd1 Bxc4 
22.Qxc4 Red8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Polugaevsky, Lev"]
[Black "Jongsma, Alexander"]
[Result "1-0"]
[ECO "A23"]
[EventDate "1970.07.14"]
[PlyCount "37"]

1.c4 e5 2.Nc3 Nf6 3.g3 c6 4.Nf3 e4 5.Nd4 d5 6.cxd5 Qb6 7.Nb3 cxd5 8.Bg2 
Bf5 9.d3 exd3 10.O-O Nc6 11.Bg5 O-O-O 12.exd3 Be6 13.Rc1 Kb8 14.d4 Be7 15.
Na4 Qc7 16.Nbc5 h6 17.Be3 Rc8 18.Bf4 Bd6 19.Qb3 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.21"]
[Round "7"]
[White "Spassky, Boris"]
[Black "Tringov, Georgi"]
[Result "1/2-1/2"]
[ECO "E82"]
[EventDate "1970.07.14"]
[PlyCount "41"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6 7.Bd3 Bb7 8.Nge2 c5 
9.d5 e6 10.O-O exd5 11.exd5 Nbd7 12.Bg5 Qe7 13.f4 h6 14.Bh4 a6 15.a4 Rfe8 
16.h3 Qf8 17.Rf3 Nh7 18.Qc2 Bc8 19.Raf1 Ra7 20.g4 Kh8 21.Be1 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Ciric, Dragoljub"]
[Black "Geller, Efim"]
[Result "0-1"]
[ECO "C88"]
[EventDate "1970.07.14"]
[PlyCount "136"]

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 b4 11.c3 d5 12.exd5 Nxd5 13.Nxe5 Nxe5 14.Rxe5 Bf6 15.Re1 
Qd6 16.d4 Rae8 17.Qf3 c5 18.c4 Rxe1+ 19.Bxe1 Qe7 20.Nd2 Nc3 21.d5 Ne2+ 22.
Kf1 Bxb2 23.Rb1 Re8 24.Ne4 Nd4 25.Qd3 Nxb3 26.Rxb2 Qxe4 27.Qxe4 Rxe4 28.
Rxb3 a5 29.Re3 Rxe3 30.fxe3 Ba6 31.e4 Bxc4+ 32.Kf2 Bb3 33.Ke3 Bxa4 34.Kd3 
Bb5+ 35.Kc2 c4 36.Bf2 Ba4+ 37.Kb1 Bb5 38.Bb6 a4 39.Bc5 b3 40.Kb2 f6 41.Kc3
Kf7 42.Ba3 Ke8 43.Bc5 Kd8 44.Ba3 Kd7 45.Kd4 Kc7 46.Kc3 Ba6 47.Bf8 Bb7 48.
Ba3 Ba6 49.Bf8 Bb7 50.Ba3 Kd7 51.Kd4 Kc8 52.Kc3 Kc7 53.Kd4 Kb6 54.Kc3 Kb5 
55.Kd4 b2 56.Bxb2 Kb4 57.d6 Bc8 58.Bc3+ Kb3 59.Ba1 a3 60.Bc3 a2 61.Ba1 Be6
62.h3 h5 63.h4 Bc8 64.Bc3 Bd7 65.Ba1 Be6 66.Bc3 Kc2 67.d7 Bxd7 68.Kxc4 Bc6
0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Donner, Jan"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "D26"]
[EventDate "1970.07.14"]
[PlyCount "76"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.Nc3 a6 7.dxc5 Qxd1+ 8.Kxd1
Bxc5 9.Bd3 Nbd7 10.Bd2 b6 11.Ne4 Bb7 12.Nxc5 Nxc5 13.Ke2 Nxd3 14.Kxd3 Ne4 
15.Ke2 a5 16.b4 Nxd2 17.Kxd2 axb4 18.Rhb1 Ra4 19.Ne1 Ke7 20.Rb2 Rha8 21.
Nc2 b3 22.Rxb3 Rxa2 23.Rxa2 Rxa2 24.f3 Bc6 25.Ra3 Rxa3 26.Nxa3 Kd6 27.Kc3 
Kc5 28.Nc2 Ba4 29.Nb4 Bb5 30.Nc2 Bf1 31.g3 Be2 32.f4 Kd5 33.Nd4 Bg4 34.Kd3
Bf5+ 35.Kc3 Ke4 36.Kd2 Bg4 37.Nb5 Kf3 38.Nd6 Kg2 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Janosevic, Dragoljub"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[ECO "B46"]
[EventDate "1970.07.14"]
[PlyCount "103"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Bf4 d6 7.Bg3 e5 8.Nb3 Nf6
9.Bc4 Be7 10.O-O O-O 11.a4 b6 12.Qe2 Bb7 13.Rfd1 Qc7 14.Bh4 Nb4 15.Bxf6 
Bxf6 16.Nd5 Bxd5 17.Bxd5 Nxd5 18.Rxd5 Be7 19.c3 Qc6 20.Nd2 Rfc8 21.Qd3 Bf8
22.Nf1 Re8 23.Ne3 Re6 24.Qc4 Qb7 25.Qb3 Rb8 26.c4 Ree8 27.Qd3 Qc6 28.b3 
Rb7 29.Nc2 Qc8 30.a5 bxa5 31.Rdxa5 Rb6 32.b4 d5 33.c5 dxe4 34.Qxe4 Rf6 35.
Qc4 Ree6 36.Qd5 g5 37.Ne3 Rf4 38.b5 Rd4 39.Qb3 axb5 40.Qxb5 Rd8 41.g3 Qc6 
42.Qe2 Qe4 43.R5a4 Qg6 44.Qb5 Qd3 45.Qxd3 Rxd3 46.Ra8 f5 47.Nxf5 Rc3 48.
R1a7 Rf6 49.Ne7+ Kh8 50.Nd5 Rc1+ 51.Kg2 Rf5 52.g4 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Jongsma, Alexander"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]
[ECO "A47"]
[EventDate "1970.07.14"]
[PlyCount "100"]

1.d4 Nf6 2.Nf3 b6 3.Bf4 Bb7 4.e3 c5 5.c3 d6 6.h3 Nbd7 7.Nbd2 g6 8.Be2 Bg7 
9.O-O O-O 10.Bh2 Rc8 11.a4 a6 12.Qb1 cxd4 13.exd4 Nd5 14.Re1 N7f6 15.Bf1 
a5 16.Qd1 Bh6 17.Bg3 Rc7 18.Bh4 Bg7 19.Qb3 Qa8 20.Rad1 Rfc8 21.Bg3 Bh6 22.
Nc4 Bc6 23.Nh2 Bf8 24.Ng4 Nh5 25.Bh2 Rb8 26.Na3 Ndf4 27.Ne3 Nd5 28.Nb5 Rd7
29.c4 Nxe3 30.Qxe3 Rc8 31.Nc3 d5 32.b3 Nf6 33.Be5 Bg7 34.f4 e6 35.g4 Rcd8 
36.Kh2 dxc4 37.bxc4 Ne8 38.Bxg7 Nxg7 39.d5 exd5 40.cxd5 Bxd5 41.Nxd5 Rxd5 
42.Bg2 Rxd1 43.Bxa8 Rxe1 44.Qxe1 Rxa8 45.f5 gxf5 46.gxf5 f6 47.Qe7 Re8 48.
Qxf6 Rf8 49.Qxb6 Rxf5 50.Kg3 h5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Ree, Hans"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[ECO "B82"]
[EventDate "1970.07.14"]
[PlyCount "72"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Be7 7.Bd3 Nc6 8.Nxc6 
bxc6 9.O-O O-O 10.Kh1 Nd7 11.Qf3 Nc5 12.Bd2 d5 13.e5 Nxd3 14.cxd3 Ba6 15.
Qg3 f5 16.exf6 Rxf6 17.Rae1 Bd6 18.Ne2 c5 19.Qf3 Qd7 20.Bc3 Rf7 21.d4 cxd4
22.Bxd4 e5 23.Bg1 exf4 24.Rd1 Re8 25.Rfe1 Bb4 26.Nc3 Rxe1 27.Rxe1 d4 28.
Qe4 Bb7 29.Qxd4 Qc6 30.Qd8+ Rf8 31.Qg5 h6 32.Qg4 Bxc3 33.bxc3 Rf6 34.Bd4 
Rg6 35.Qe2 Rxg2 36.Qe8+ Kh7 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Scholl, Eduard"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "B89"]
[EventDate "1970.07.14"]
[PlyCount "81"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 e6 7.Be3 a6 8.Bb3 
Na5 9.O-O b5 10.f4 Qc7 11.f5 e5 12.Nde2 Bb7 13.Nd5 Nxd5 14.Bxd5 Nc4 15.Qc1
Bxd5 16.exd5 Rc8 17.b3 Nxe3 18.Qxe3 Qc5 19.Qxc5 Rxc5 20.c4 bxc4 21.bxc4 
Be7 22.Rfc1 Kd7 23.Rab1 Rhc8 24.Rb7+ Ke8 25.Ra7 Rxc4 26.Rxc4 Rxc4 27.Rxa6 
Rc5 28.Ra8+ Bd8 29.Ng3 Rxd5 30.Nh5 Kd7 31.Nxg7 e4 32.Kf1 Ra5 33.Rxa5 Bxa5 
34.Nh5 Bc3 35.h4 d5 36.g4 Kd6 37.Nf4 Ke5 38.Ne2 Ba5 39.a4 d4 40.Nc1 d3 41.
Nb3 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Tringov, Georgi"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[ECO "B57"]
[EventDate "1970.07.14"]
[PlyCount "94"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6 7.Nb3 e6 8.Be3 
Qc7 9.f4 Be7 10.Bd3 a6 11.Qe2 b5 12.g4 Bb7 13.g5 Nd7 14.O-O g6 15.a4 b4 
16.Nd1 Bf8 17.c3 Bg7 18.Rc1 Qd8 19.cxb4 Nxb4 20.Nc3 h6 21.gxh6 Rxh6 22.Bb1
Rh3 23.Rcd1 Bf8 24.Bf2 Rc8 25.Rd2 Rh5 26.Qe3 Rc4 27.Qg3 g5 28.Be3 gxf4 29.
Bxf4 Rh7 30.Kh1 Rg7 31.Qf3 Qh4 32.Rg2 Rxg2 33.Kxg2 Nc6 34.Bg3 Qh7 35.Kg1 
Nce5 36.Qe2 Rc7 37.Nd4 Qg6 38.Nf3 Bg7 39.Kh1 Qh5 40.Qg2 Qg4 41.Nxe5 Nxe5 
42.Qf2 Qh3 43.Kg1 Nc4 44.Qa7 Rd7 45.Rf2 Bh6 46.Qb8+ Ke7 47.Qh8 Qh5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.22"]
[Round "8"]
[White "Uhlmann, Wolfgang"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[ECO "D25"]
[EventDate "1970.07.14"]
[PlyCount "34"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4 5.Bxc4 e6 6.Nc3 a6 7.h3 Bh5 8.O-O Nc6
9.Be2 Bd6 10.b3 O-O 11.Bb2 Qe7 12.Nd2 Bxe2 13.Nxe2 Ba3 14.Bxa3 Qxa3 15.Nc4
Qe7 16.Nf4 e5 17.dxe5 Nxe5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Csom, Istvan"]
[Black "Scholl, Eduard"]
[Result "1-0"]
[ECO "C44"]
[EventDate "1970.07.14"]
[PlyCount "149"]

1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d3 d5 5.Nbd2 Be7 6.O-O O-O 7.c3 a5 8.Re1 Be6
9.b3 Nd7 10.a3 f5 11.Bb2 Bf6 12.Bf1 Kh8 13.Qc2 dxe4 14.dxe4 f4 15.h3 g5 
16.Nh2 h5 17.b4 Qe8 18.Bc4 Rg8 19.Rad1 Rg7 20.Qd3 Nb6 21.Bxe6 Qxe6 22.b5 
Ne7 23.c4 Na4 24.Ba1 Nc5 25.Qc2 g4 26.hxg4 hxg4 27.f3 g3 28.Ng4 Ng6 29.Kf1
Nh4 30.Nxf6 Qxf6 31.Nb3 Nxb3 32.Qxb3 Rh7 33.Rd2 Ng6 34.Ke2 Rh2 35.Kd1 Nh4 
36.Qc3 Re8 37.Ree2 Qb6 38.Kc2 c6 39.a4 Rh1 40.c5 Qc7 41.b6 Qf7 42.Kb2 Rg1 
43.Ka3 Kh7 44.Bb2 Kg6 45.Qxa5 Nxg2 46.Rxg2 Rxg2 47.Rxg2 Qc4 48.Qd2 Qxc5+ 
49.Qb4 Qe3+ 50.Qb3 Qe1 51.Qd3 c5 52.Qd6+ Kg5 53.Rd2 Qf1 54.Qd7 Qxf3+ 55.
Ka2 Qe3 56.Qg7+ Kh4 57.Rd6 Kh3 58.Qd7+ Kg2 59.Qxe8 f3 60.Qb5 f2 61.Rd1 Qe1
62.Rxe1 fxe1=Q 63.Qxc5 Qxe4 64.a5 Qa4+ 65.Kb1 e4 66.Qc2+ Qxc2+ 67.Kxc2 e3 
68.a6 Kf1 69.axb7 g2 70.b8=Q g1=Q 71.Qf4+ Ke2 72.Qc4+ Kf3 73.Qd5+ Ke2 74.
Qd3+ Kf3 75.Bd4 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Geller, Efim"]
[Black "Janosevic, Dragoljub"]
[Result "1-0"]
[ECO "D36"]
[EventDate "1970.07.14"]
[PlyCount "123"]

1.Nf3 Nf6 2.c4 e6 3.Nc3 d5 4.d4 c6 5.Bg5 Nbd7 6.cxd5 exd5 7.e3 Be7 8.Qc2 
O-O 9.Bd3 Re8 10.O-O h6 11.Bf4 Nf8 12.Rab1 Ne6 13.Bg3 a5 14.a3 Ng5 15.Ne5 
Nge4 16.Nxe4 Nxe4 17.Bxe4 dxe4 18.Qxe4 f6 19.Nc4 Bxa3 20.Bc7 Qe7 21.Qxe7 
Bxe7 22.Nxa5 Bb4 23.Ra1 Bxa5 24.Bxa5 Be6 25.f3 Ra6 26.Bc3 Bc4 27.Rxa6 Bxa6
28.Re1 Kf7 29.Kf2 Bc4 30.h4 h5 31.Ra1 f5 32.Ra5 g6 33.Bd2 Bd3 34.Kg3 Bf1 
35.Kf2 Bd3 36.Ra1 Bb5 37.Kg3 Bd3 38.Kf4 Bb5 39.Bc3 Bc4 40.Ra5 Bf1 41.Bb4 
Bc4 42.Bd6 Bd3 43.Be5 Bf1 44.Ra1 Bd3 45.b4 Rd8 46.Kg5 Ba6 47.Ra2 Bc4 48.
Rc2 Bb5 49.Rd2 Bc4 50.e4 Be6 51.Rb2 b5 52.Rc2 Rc8 53.Rc1 fxe4 54.fxe4 Bc4 
55.Rc3 Be2 56.Re3 Bg4 57.Re1 Rf8 58.Ra1 Rg8 59.Ra7+ Ke8 60.Bd6 Bd7 61.Kf6 
Kd8 62.Be7+ 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Gligoric, Svetozar"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[ECO "A50"]
[EventDate "1970.07.14"]
[PlyCount "88"]

1.d4 Nf6 2.c4 Nc6 3.d5 Ne5 4.e4 e6 5.Nf3 Bb4+ 6.Bd2 Bxd2+ 7.Nbxd2 d6 8.
Nxe5 dxe5 9.Qa4+ c6 10.dxc6 O-O 11.c5 bxc6 12.Nb3 a5 13.Rd1 Qc7 14.f3 Bd7 
15.Nd2 Qa7 16.Qa3 Bc8 17.Nc4 Nd7 18.Rc1 Ba6 19.Qxa5 Nxc5 20.Nb6 Bxf1 21.
Qxc5 Bxg2 22.Nxa8 Qxc5 23.Rxc5 Bxh1 24.Nb6 Bxf3 25.Rxc6 Bxe4 26.Rc7 f5 27.
a4 f4 28.a5 Bh1 29.a6 e4 30.Rc8 Rxc8 31.Nxc8 e3 32.Ke2 Kf8 33.a7 e5 34.b4 
Bc6 35.Nb6 Ke7 36.a8=Q Bxa8 37.Nxa8 Kd6 38.Nb6 g5 39.Nc4+ Kd5 40.b5 Kc5 
41.b6 Kc6 42.Nxe5+ Kxb6 43.Nf7 g4 44.Ne5 h5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Hartoch, Robert"]
[Black "Tringov, Georgi"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1970.07.14"]
[PlyCount "131"]

1.c4 c5 2.b3 Nc6 3.Bb2 e6 4.Nf3 Nf6 5.g3 d5 6.Bg2 d4 7.O-O Be7 8.d3 O-O 9.
e4 e5 10.Qe2 Bg4 11.h3 Bh5 12.Nbd2 Nd7 13.Rfe1 f6 14.Nf1 Qc7 15.Qc2 Bf7 
16.Bc1 Bd6 17.Kh1 a6 18.a3 b5 19.Bd2 Rfb8 20.Reb1 a5 21.a4 bxc4 22.bxc4 
Nb4 23.Bxb4 axb4 24.N3d2 Ra6 25.Nb3 Rba8 26.Rb2 Nb8 27.Rba2 Be8 28.a5 Nc6 
29.Nfd2 Nxa5 30.Nxa5 Rxa5 31.Rxa5 Rxa5 32.Rxa5 Qxa5 33.Bf3 g6 34.Nb3 Qa3 
35.Kg2 Bf8 36.Bd1 Bc6 37.Qc1 h5 38.Qc2 Qa8 39.Kh2 Qa7 40.Qb2 Bd7 41.Qa1 
Qa3 42.Bc2 Ba4 43.Qb1 Kf7 44.Kg2 Ke6 45.Kh2 Kd6 46.Kg2 Bh6 47.Kh2 Bc6 48.
Qa1 f5 49.f3 Be3 50.Kg2 Kc7 51.Kf1 g5 52.g4 fxg4 53.fxg4 hxg4 54.hxg4 Bd7 
55.Bd1 Kb6 56.Kg2 Ba4 57.Qb1 Bc1 58.Qc2 Bf4 59.Qb1 Bd7 60.Qa1 Bc8 61.Kf3 
Be6 62.Bc2 Bd7 63.Bd1 Bc8 64.Qb1 Be3 65.Qa1 Bd2 66.Bc2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Hort, Vlastimil"]
[Black "Ciric, Dragoljub"]
[Result "1-0"]
[ECO "B14"]
[EventDate "1970.07.14"]
[PlyCount "51"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Be7 7.Bg5 O-O 8.c5 b6 
9.b4 a5 10.a3 Ne4 11.Bxe7 Qxe7 12.Nxe4 dxe4 13.Ne5 Rd8 14.Bb5 axb4 15.axb4
Rxa1 16.Qxa1 bxc5 17.dxc5 Qb7 18.Qa5 Qd5 19.O-O Rf8 20.Qa1 Rd8 21.Bc4 Qd4 
22.c6 Qb6 23.b5 Qc7 24.Qb2 Qb6 25.Qc2 f5 26.c7 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Langeweg, Christian"]
[Black "Donner, Jan"]
[Result "0-1"]
[ECO "A12"]
[EventDate "1970.07.14"]
[PlyCount "44"]

1.Nf3 d5 2.c4 c6 3.b3 Bg4 4.Bb2 Nd7 5.cxd5 cxd5 6.e3 Ngf6 7.h3 Bh5 8.g4 
Bg6 9.d3 e6 10.g5 Ng8 11.Rg1 Ne7 12.Nc3 Bh5 13.Be2 h6 14.gxh6 Rxh6 15.Ng5 
Bxe2 16.Nxe2 Nf5 17.e4 Nh4 18.Nf4 d4 19.Nf3 Nxf3+ 20.Qxf3 Qf6 21.Qg3 Bd6 
22.Nh5 Bb4+ 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Polugaevsky, Lev"]
[Black "Uhlmann, Wolfgang"]
[Result "1-0"]
[ECO "E75"]
[EventDate "1970.07.14"]
[PlyCount "101"]

1.c4 Nf6 2.Nc3 g6 3.e4 d6 4.d4 Bg7 5.Be2 O-O 6.Bg5 c5 7.d5 e6 8.Qd2 exd5 
9.exd5 Re8 10.Nf3 Bg4 11.O-O Nbd7 12.h3 Bxf3 13.Bxf3 a6 14.a4 Qe7 15.Rae1 
Qf8 16.Bd1 Rxe1 17.Rxe1 Re8 18.Rxe8 Qxe8 19.Bc2 Nb6 20.b3 Nbd7 21.Bf4 Qe7 
22.Qe2 Kf8 23.Qxe7+ Kxe7 24.a5 h5 25.Bd2 Ne8 26.g3 Bd4 27.Kg2 Ng7 28.f4 
Nf5 29.Nd1 Nh6 30.Kf3 f5 31.Bd3 Kd8 32.Ne3 Ke7 33.Nc2 Bb2 34.Ke3 Nf6 35.
Ne1 Bd4+ 36.Kf3 Bb2 37.Ng2 Nd7 38.Nh4 Kf6 39.Ke3 Nf7 40.Bc2 Ba1 41.Ke2 Bb2
42.Be1 Ba1 43.g4 hxg4 44.hxg4 fxg4 45.Nxg6 Kg7 46.Nh4 Kf8 47.Bf5 Nf6 48.
Bc8 Nd8 49.Nf5 Nh5 50.Bd2 Bd4 51.Nxd4 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.24"]
[Round "9"]
[White "Spassky, Boris"]
[Black "Ree, Hans"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1970.07.14"]
[PlyCount "81"]

1.e4 d6 2.d4 Nf6 3.Nc3 e5 4.dxe5 dxe5 5.Qxd8+ Kxd8 6.Bc4 Be6 7.Bxe6 fxe6 
8.Nf3 Bd6 9.Be3 Nc6 10.O-O-O Ng4 11.Bg5+ Ke8 12.Bh4 Nf6 13.Ne1 Rf8 14.Nd3 
Nh5 15.Nb5 Rc8 16.Rd2 Nf6 17.f3 Ke7 18.c4 a6 19.Nxd6 cxd6 20.Kb1 h6 21.c5 
dxc5 22.Nxc5 Rc7 23.Rhd1 g5 24.Bg3 Rfc8 25.Rd6 Nd4 26.Bxe5 Rxc5 27.Bxd4 
Rb5 28.Rb6 Rxb6 29.Bxb6 g4 30.Be3 gxf3 31.gxf3 h5 32.Bg5 Rg8 33.h4 e5 34.
Rc1 Ke6 35.Rc7 Rb8 36.Rg7 Nd7 37.Rg6+ Kf7 38.Rd6 Nf8 39.Rf6+ Kg7 40.Rb6 
Kf7 41.Rh6 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Ciric, Dragoljub"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[ECO "B87"]
[EventDate "1970.07.14"]
[PlyCount "41"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.Qe2 Be7
9.f3 O-O 10.g4 b4 11.Na4 Bd7 12.c3 Qa5 13.cxb4 Qxb4+ 14.Qd2 d5 15.Qxb4 
Bxb4+ 16.Bd2 Bxd2+ 17.Kxd2 Bxa4 18.Bxa4 dxe4 19.g5 Nfd7 20.fxe4 Rd8 21.
Bxd7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Donner, Jan"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "E74"]
[EventDate "1970.07.14"]
[PlyCount "93"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Be2 O-O 7.Bg5 a6 8.a4 Qa5 9.
Bd2 e6 10.Nf3 Qc7 11.O-O exd5 12.cxd5 Re8 13.Qc2 Bg4 14.Rfe1 Nbd7 15.a5 c4
16.Be3 Nc5 17.Nd2 Bxe2 18.Rxe2 Ncd7 19.h3 Re7 20.Qa4 Rc8 21.Rc1 Nc5 22.
Qxc4 Nfd7 23.Rc2 Qxa5 24.b4 Qa1+ 25.Ndb1 Nb6 26.Qa2 Qxa2 27.Nxa2 Nca4 28.
Rxc8+ Nxc8 29.Rc2 Ncb6 30.Nd2 f5 31.Bf4 Rd7 32.f3 fxe4 33.fxe4 Nb2 34.Nc1 
N6a4 35.Rc8+ Kf7 36.Nf3 h6 37.Ne2 Nb6 38.Rc2 Nd3 39.Bd2 Re7 40.Ng3 Re8 41.
Kf1 Rc8 42.Rxc8 Nxc8 43.Ke2 Nb2 44.Nf1 Nb6 45.Ne3 N6c4 46.Nxc4 Nxc4 47.Bf4
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Janosevic, Dragoljub"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[ECO "B83"]
[EventDate "1970.07.14"]
[PlyCount "55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Be7 7.Be3 O-O 8.O-O 
Nc6 9.f4 Bd7 10.Qe1 Nxd4 11.Bxd4 Bc6 12.Bd3 a6 13.Rd1 b5 14.a3 Qd7 15.Qg3 
Rad8 16.Bb6 Rb8 17.Be3 b4 18.axb4 Rxb4 19.e5 Nh5 20.Qe1 g6 21.Nd5 Bxd5 22.
Qxb4 dxe5 23.Qd2 exf4 24.Bxf4 Nxf4 25.Qxf4 Bd6 26.Qh6 Qb7 27.Rd2 Qxb2 28.
Kh1 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Ree, Hans"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[ECO "A54"]
[EventDate "1970.07.14"]
[PlyCount "62"]

1.d4 Nf6 2.c4 Nc6 3.Nf3 d6 4.Nc3 e5 5.d5 Ne7 6.e4 h6 7.h3 Ng6 8.Be3 Be7 9.
g3 O-O 10.Qc2 Bd7 11.Bg2 Qc8 12.Nd2 c5 13.h4 Ng4 14.Nf1 Nxe3 15.Nxe3 a6 
16.Nf5 Re8 17.O-O Qc7 18.Nd1 Bf8 19.Bh3 Nh8 20.Kg2 Qc8 21.Rh1 g6 22.Nfe3 
Bg7 23.h5 Rf8 24.Nc3 Bf6 25.hxg6 fxg6 26.Bxd7 Qxd7 27.Rxh6 Bg5 28.Rh2 Bxe3
29.fxe3 Nf7 30.Ne2 Ng5 31.Rah1 Kg7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Scholl, Eduard"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "B84"]
[EventDate "1970.07.14"]
[PlyCount "83"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Be7 7.O-O O-O 8.f4 a6
9.Kh1 Qc7 10.Bf3 Nc6 11.a4 Bd7 12.Nb3 Rac8 13.a5 Nb4 14.Be3 e5 15.Rf2 Rfe8
16.Rd2 Be6 17.Nc1 exf4 18.Bxf4 Nc6 19.Nb3 Ne5 20.Be2 Nc4 21.Bxc4 Bxc4 22.
Nd4 Bf8 23.Nf5 Nxe4 24.Nxe4 Rxe4 25.Bxd6 Qc6 26.Bxf8 Rxf8 27.Rd4 g6 28.
Rxe4 Qxe4 29.Nd6 Qc6 30.Nxc4 Qxc4 31.Qd7 Qxc2 32.Qxb7 Qe2 33.h3 Re8 34.b4 
Re5 35.Rc1 Kg7 36.Qc8 Re4 37.Qc3+ f6 38.Rb1 g5 39.Qb2 Qb5 40.Qc3 Rc4 41.
Qe3 Rc7 42.Qd4 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Spassky, Boris"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "E83"]
[EventDate "1970.07.14"]
[PlyCount "43"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 Rb8 8.Nc1 e5 
9.Nb3 Re8 10.d5 Nd4 11.Nxd4 exd4 12.Bxd4 c5 13.Be3 b5 14.cxb5 Nxe4 15.fxe4
Bxc3+ 16.bxc3 Rxe4 17.Qd2 Qh4+ 18.g3 Qe7 19.Kf2 Qf6+ 20.Kg1 Bg4 21.Bg5 Qe5
22.Bf4 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Tringov, Georgi"]
[Black "Geller, Efim"]
[Result "1/2-1/2"]
[ECO "C94"]
[EventDate "1970.07.14"]
[PlyCount "75"]

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 Nb8 10.d3 Nbd7 11.Nbd2 Bb7 12.Nf1 Nc5 13.Bc2 Re8 14.Ng3 Bf8 15.Nh2 d5
16.Qf3 Ne6 17.Nf5 Kh8 18.Ng4 Nxg4 19.Qxg4 Qf6 20.Qg3 dxe4 21.dxe4 c5 22.
Be3 c4 23.Rad1 Rad8 24.Rxd8 Rxd8 25.Bc1 g6 26.Ne3 Qf4 27.Nf1 Qxg3 28.Nxg3 
Kg7 29.Be3 Bc5 30.Nf1 a5 31.f3 Bxe3+ 32.Rxe3 Nc5 33.Re2 Kf6 34.Rd2 Rxd2 
35.Nxd2 Ba6 36.Kf2 Ke6 37.Ke3 Kd6 38.g3 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.25"]
[Round "10"]
[White "Uhlmann, Wolfgang"]
[Black "Csom, Istvan"]
[Result "1-0"]
[ECO "D63"]
[EventDate "1970.07.14"]
[PlyCount "59"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 Nbd7 6.e3 O-O 7.Rc1 a6 8.cxd5 
exd5 9.Bd3 c6 10.O-O Re8 11.Bb1 Nf8 12.Ne5 Bd6 13.f4 Be7 14.Kh1 N6d7 15.
Bxe7 Qxe7 16.e4 dxe4 17.Nxe4 Nf6 18.Nxf6+ Qxf6 19.f5 Nd7 20.Re1 Qd6 21.Nc4
Rxe1+ 22.Qxe1 Qxd4 23.Qe8+ Nf8 24.Ne5 Qd5 25.Be4 Bd7 26.Qxf8+ Rxf8 27.Bxd5
Bxf5 28.Bb3 g6 29.Rf1 Kg7 30.Nxf7 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Csom, Istvan"]
[Black "Ciric, Dragoljub"]
[Result "1/2-1/2"]
[ECO "D14"]
[EventDate "1970.07.14"]
[PlyCount "24"]

1.Nf3 d5 2.d4 Nf6 3.c4 c6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3 e6 8.Bd3 
Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 12.Rfc1 Rfc8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Geller, Efim"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B92"]
[EventDate "1970.07.14"]
[PlyCount "83"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.O-O 
Be6 9.f4 Qc7 10.Kh1 b5 11.a4 b4 12.Nd5 Bxd5 13.exd5 O-O 14.Bd2 a5 15.c3 
Na6 16.cxb4 Nxb4 17.Bxb4 axb4 18.Bb5 Ne4 19.Rc1 Qa7 20.Qc2 f5 21.Nd2 exf4 
22.Nxe4 fxe4 23.Qxe4 Qe3 24.Rce1 Qxe4 25.Rxe4 Bf6 26.Rxb4 Rfc8 27.b3 g5 
28.g3 Be5 29.gxf4 gxf4 30.Bc6 Ra5 31.Rc4 Kg7 32.Kg2 Kf6 33.Kf3 Ra7 34.Rfc1
Rg8 35.b4 Rg6 36.Be8 Rh6 37.Rc7 Rxc7 38.Rxc7 Rxh2 39.b5 Kg5 40.Rf7 Rh3+ 
41.Ke2 Re3+ 42.Kd2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Gligoric, Svetozar"]
[Black "Uhlmann, Wolfgang"]
[Result "0-1"]
[ECO "D86"]
[EventDate "1970.07.14"]
[PlyCount "138"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2
Nc6 9.Be3 Na5 10.Bd3 c5 11.d5 c4 12.Bc2 e6 13.dxe6 Bxe6 14.O-O Qe7 15.Nd4 
Rfe8 16.Qd2 Bd7 17.Bh6 Bxh6 18.Qxh6 Qa3 19.Qe3 b5 20.Rab1 a6 21.f4 Nc6 22.
Rbe1 Nxd4 23.Qxd4 Rad8 24.Qf6 Bc8 25.Rd1 Rxd1 26.Rxd1 Bg4 27.Rf1 Qxa2 28.
f5 Rf8 29.Qg5 Qxc2 30.f6 Kh8 31.Qxg4 Qxc3 32.h3 Qe3+ 33.Kh2 c3 34.Qd7 Qxe4
35.Qc7 b4 36.Rf4 Qe6 37.Rxb4 Qxf6 38.Rb6 Qd4 39.Rxa6 Re8 40.Rc6 Re3 41.Rc4
Qd2 42.Qxf7 Qd6+ 43.Kg1 Re1+ 44.Kf2 Qd2+ 45.Kg3 Qd3+ 46.Kg4 Re4+ 47.Rxe4 
Qxe4+ 48.Kg3 Qe3+ 49.Kh4 Qc5 50.g4 c2 51.g5 Qc8 52.Qe7 c1=Q 53.Qe5+ Kg8 
54.Qd5+ Kf8 55.Qd6+ Ke8 56.Qe5+ Kd7 57.Qd5+ Ke7 58.Qe5+ Kd7 59.Qd4+ Kc6 
60.Qc3+ Kb5 61.Qb3+ Ka5 62.Qa3+ Kb6 63.Qb3+ Ka7 64.Qa3+ Kb8 65.Qb4+ Qb7 
66.Qd6+ Qbc7 67.Qf8+ Ka7 68.Qf2+ Q1c5 69.Qa2+ Kb6 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Hartoch, Robert"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "A25"]
[EventDate "1970.07.14"]
[PlyCount "64"]

1.c4 e5 2.g3 Nc6 3.Bg2 g6 4.Nc3 Bg7 5.Rb1 d6 6.b4 f5 7.b5 Nce7 8.e3 Nf6 9.
d4 e4 10.Nge2 Be6 11.d5 Bf7 12.Nd4 Nd7 13.f3 exf3 14.Qxf3 O-O 15.O-O Nb6 
16.Qe2 c5 17.bxc6 bxc6 18.Bd2 cxd5 19.Nxd5 Rc8 20.Ba5 Nexd5 21.cxd5 Bxd4 
22.exd4 Qf6 23.Bxb6 axb6 24.Rxb6 Qxd4+ 25.Qf2 Qd3 26.Rxd6 Rc2 27.Qf3 Qd4+ 
28.Kh1 Re8 29.h3 Ree2 30.Rd8+ Kg7 31.Qa3 Be8 32.Rg1 Qxg1+ 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Hort, Vlastimil"]
[Black "Tringov, Georgi"]
[Result "1/2-1/2"]
[ECO "D40"]
[EventDate "1970.07.14"]
[PlyCount "50"]

1.c4 c5 2.Nf3 Nc6 3.e3 e6 4.d4 d5 5.Nc3 Nf6 6.a3 cxd4 7.exd4 Be7 8.Bg5 O-O
9.Bd3 dxc4 10.Bxc4 b6 11.O-O Bb7 12.Qd3 Nd5 13.Bxd5 Bxg5 14.Be4 g6 15.d5 
exd5 16.Bxd5 Bh6 17.Rad1 Na5 18.h3 Bg7 19.b4 Bxc3 20.Bxf7+ Kxf7 21.Qxc3 
Qf6 22.Rd7+ Kg8 23.Qxf6 Rxf6 24.bxa5 Bxf3 25.gxf3 bxa5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Jongsma, Alexander"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "E90"]
[EventDate "1970.07.14"]
[PlyCount "54"]

1.d4 g6 2.Nf3 Bg7 3.c4 c5 4.d5 d6 5.Nc3 Nf6 6.e4 O-O 7.h3 e5 8.dxe6 Bxe6 
9.Bd3 Nc6 10.O-O a6 11.Bg5 Re8 12.Qd2 Qa5 13.Rfe1 Nd7 14.Rac1 Nde5 15.Nxe5
Nxe5 16.b3 Bxh3 17.f4 Nxd3 18.Qxd3 Be6 19.f5 Bxf5 20.Nd5 Bd4+ 21.Kh1 Be6 
22.Nf6+ Kg7 23.Nxe8+ Rxe8 24.Bd2 Qxa2 25.Rc2 Qa3 26.Bc3 Kg8 27.Bxd4 cxd4 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Langeweg, Christian"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "E66"]
[EventDate "1970.07.14"]
[PlyCount "51"]

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 c5 6.O-O d6 7.Nc3 Nc6 8.d5 Na5 
9.Nd2 e5 10.a3 b6 11.b4 Nb7 12.Bb2 Ne8 13.e3 f5 14.f4 Bd7 15.b5 Qe7 16.Qc2
Nf6 17.Rae1 Rae8 18.Nd1 exf4 19.gxf4 Ng4 20.h3 Bxb2 21.Qxb2 Nf6 22.Bf3 Qg7
23.Kh2 Re7 24.Rg1 Rfe8 25.Qc3 Kf7 26.Rg3 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.27"]
[Round "11"]
[White "Polugaevsky, Lev"]
[Black "Janosevic, Dragoljub"]
[Result "1-0"]
[ECO "D52"]
[EventDate "1970.07.14"]
[PlyCount "53"]

1.c4 Nf6 2.Nc3 e6 3.d4 d5 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.cxd5 Nxd5 8.Qd2 
Bb4 9.Rc1 h6 10.Bh4 c5 11.Bd3 cxd4 12.exd4 b6 13.O-O O-O 14.Bb1 Ba6 15.Qc2
f5 16.Nxd5 Qxd5 17.Rfd1 Bb7 18.Bg3 a5 19.a3 Rac8 20.Qe2 Be7 21.b4 axb4 22.
axb4 Ra8 23.Bd3 Rf6 24.Rc7 f4 25.Bh4 Ra2 26.Qe1 Rg6 27.Bxg6 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Ciric, Dragoljub"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "C93"]
[EventDate "1970.07.14"]
[PlyCount "35"]

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 h6 10.d4 Re8 11.Nbd2 Bf8 12.Nf1 Bb7 13.Ng3 Na5 14.Bc2 Nc4 15.b3 Nb6 
16.Bd2 g6 17.Nh2 h5 18.Bg5 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Donner, Jan"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[ECO "D80"]
[EventDate "1970.07.14"]
[PlyCount "95"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Bh4 c5 6.cxd5 Nxc3 7.bxc3 Qxd5 8.e3 
cxd4 9.Qxd4 Qxd4 10.cxd4 e6 11.Rb1 Be7 12.Bb5+ Bd7 13.Bg3 Nc6 14.Nf3 a6 
15.Ba4 b5 16.Bb3 Na5 17.Ne5 f6 18.Nxd7 Kxd7 19.Bc2 Rac8 20.Bd3 Rc3 21.Ke2 
Ra3 22.Rb2 Rc8 23.Rd1 Rcc3 24.Rdd2 Nc6 25.d5 exd5 26.Be4 d4 27.Bxc6+ Kxc6 
28.Rxd4 Rc4 29.Rxc4+ bxc4 30.f3 Bc5 31.Bf2 a5 32.h3 Rc3 33.Kd2 Bb4 34.Rc2 
Ra3+ 35.Ke2 Kb5 36.e4 Bc5 37.Be1 Re3+ 38.Kf1 Bb4 39.Bf2 Rd3 40.Ke2 Bc3 41.
Be3 a4 42.Bc1 Be5 43.Be3 g5 44.Bd2 h5 45.Bc1 h4 46.Bd2 Rd7 47.Be1 Kc5 48.
a3 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Janosevic, Dragoljub"]
[Black "Csom, Istvan"]
[Result "1-0"]
[ECO "B61"]
[EventDate "1970.07.14"]
[PlyCount "75"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 7.Qd2 Nxd4 8.
Qxd4 Qa5 9.f4 e6 10.O-O-O Be7 11.Bc4 Bc6 12.Rhe1 h6 13.Bh4 Qh5 14.Bg3 O-O 
15.e5 dxe5 16.Rxe5 Rfd8 17.Nd5 exd5 18.Bd3 Qg4 19.Rxe7 Re8 20.Rxe8+ Bxe8 
21.Re1 Bc6 22.Rf1 a6 23.Rf3 Ne4 24.h3 Qg6 25.Be1 Qxg2 26.Bxe4 g5 27.Bc3 
Kf8 28.Qg7+ Ke8 29.Re3 dxe4 30.Qg8+ Ke7 31.Qxa8 gxf4 32.Re1 e3 33.Bb4+ Ke6
34.Qc8+ Ke5 35.Qc7+ Ke4 36.Qxf7 Kf3 37.Qh5+ Kg3 38.Qg4+ 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Langeweg, Christian"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "B08"]
[EventDate "1970.07.14"]
[PlyCount "83"]

1.Nf3 g6 2.e4 Bg7 3.d4 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O c6 7.a4 a5 8.e5 Nfd7 
9.exd6 exd6 10.Bf4 d5 11.Na2 Nf6 12.Ne5 Nbd7 13.Nd3 Ne4 14.c3 Ndf6 15.Qb3 
Re8 16.Rae1 Bf8 17.Nac1 Bd6 18.Ne5 Bxe5 19.dxe5 Nd7 20.Nd3 g5 21.Be3 Nxe5 
22.Nxe5 Rxe5 23.Bd3 Qe7 24.Qd1 Bf5 25.f4 gxf4 26.Bxf4 Re6 27.Qf3 Bg6 28.
Bxe4 Bxe4 29.Qh5 Rg6 30.Rf2 Qe6 31.Qe5 Qxe5 32.Bxe5 f5 33.g3 Kf7 34.Bd4 
Ke6 35.Ra1 h5 36.Rf4 Rg4 37.Rxg4 hxg4 38.b4 Kd6 39.Kf2 Re8 40.Bb6 Bf3 41.
Ra2 axb4 42.cxb4 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Ree, Hans"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "A39"]
[EventDate "1970.07.14"]
[PlyCount "81"]

1.c4 g6 2.Nc3 c5 3.g3 Bg7 4.Bg2 Nc6 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 
Nxd4 9.Qxd4 d6 10.Qd3 Rb8 11.Bd2 a6 12.Rac1 Bd7 13.Rfd1 Bc6 14.e4 Nd7 15.
b3 b5 16.Nd5 Nc5 17.Qe3 bxc4 18.Rxc4 e6 19.Nf4 Qe7 20.h4 Rfc8 21.Rdc1 Qd7 
22.Bh3 Qb7 23.f3 Nd7 24.h5 Ne5 25.Rb4 Qd7 26.Rxb8 Rxb8 27.hxg6 hxg6 28.Kg2
Rb5 29.Ne2 Ba8 30.Kf2 Rc5 31.f4 Rxc1 32.Bxc1 Nc6 33.Bg2 Qa7 34.Qxa7 Nxa7 
35.Ba3 Bf8 36.Nc3 f6 37.Bf1 Bb7 38.Ke3 Nc8 39.Bb2 Kf7 40.a4 Be7 41.a5 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Spassky, Boris"]
[Black "Geller, Efim"]
[Result "1/2-1/2"]
[ECO "C92"]
[EventDate "1970.07.14"]
[PlyCount "41"]

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 Nd7 10.d4 Nb6 11.Nbd2 Bf6 12.Nf1 Re8 13.N1h2 exd4 14.cxd4 Na5 15.Bc2 
c5 16.Ng4 Bxg4 17.hxg4 Bxd4 18.Nxd4 cxd4 19.Qxd4 Rc8 20.Qd1 Nbc4 21.g5 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Tringov, Georgi"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[ECO "B50"]
[EventDate "1970.07.14"]
[PlyCount "33"]

1.e4 c5 2.Nf3 d6 3.Nc3 Nf6 4.e5 dxe5 5.Nxe5 e6 6.Bb5+ Nbd7 7.Qf3 Bd6 8.
Nxd7 Nxd7 9.Ne4 Be7 10.Qg3 O-O 11.Nd6 Nb6 12.Nxc8 Rxc8 13.Be2 c4 14.O-O 
Nd5 15.Qf3 Qd7 16.c3 Rfd8 17.Rd1 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.28"]
[Round "12"]
[White "Uhlmann, Wolfgang"]
[Black "Jongsma, Alexander"]
[Result "1-0"]
[ECO "A54"]
[EventDate "1970.07.14"]
[PlyCount "81"]

1.d4 Nf6 2.c4 Nc6 3.Nf3 d6 4.Nc3 e5 5.d5 Ne7 6.e4 h6 7.c5 Ng6 8.Bb5+ Bd7 
9.Qb3 dxc5 10.Bxd7+ Nxd7 11.Qxb7 Bd6 12.O-O O-O 13.Qa6 Nh4 14.Nxh4 Qxh4 
15.Qa4 Nf6 16.f3 Nh5 17.Qc2 Rab8 18.Be3 Rb4 19.a3 Rb7 20.Na4 Rfb8 21.Rab1 
f5 22.Bxc5 fxe4 23.fxe4 Nf6 24.Rbe1 Rxb2 25.Nxb2 Ng4 26.g3 Bxc5+ 27.Kh1 
Qxh2+ 28.Qxh2 Nxh2 29.Kxh2 Rxb2+ 30.Kh3 Bxa3 31.Kg4 Rb6 32.Rb1 Rg6+ 33.Kh3
Bc5 34.Rb7 Bb6 35.Rf5 Rf6 36.Rxe5 Rf8 37.Re7 Rd8 38.Kg4 Kf8 39.Rexc7 Bxc7 
40.Rxc7 Ra8 41.e5 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Csom, Istvan"]
[Black "Tringov, Georgi"]
[Result "1/2-1/2"]
[ECO "A36"]
[EventDate "1970.07.14"]
[PlyCount "26"]

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e6 6.Nge2 Nge7 7.O-O O-O 8.d4 
cxd4 9.Nxd4 d5 10.cxd5 Nxd4 11.exd4 Nxd5 12.Nxd5 exd5 13.Be3 Be6 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Geller, Efim"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1970.07.14"]
[PlyCount "57"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.Nf3 c5 7.O-O Nc6 8.d5 Na5 
9.Nd2 e5 10.e4 Ne8 11.b3 f5 12.exf5 gxf5 13.Bb2 Nf6 14.Qc2 Bd7 15.Rae1 a6 
16.Nd1 b5 17.Ne3 Nh5 18.Bf3 Qg5 19.Bxh5 Qxh5 20.f4 b4 21.fxe5 dxe5 22.Ng2 
Rae8 23.Nf3 f4 24.gxf4 exf4 25.Bxg7 Kxg7 26.Rxe8 Bxe8 27.Qe4 Nb7 28.Qe7+ 
Qf7 29.Qxf7+ 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Gligoric, Svetozar"]
[Black "Janosevic, Dragoljub"]
[Result "1-0"]
[ECO "A79"]
[EventDate "1970.07.14"]
[PlyCount "69"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Nf3 O-O 7.Be2 e6 8.O-O exd5 
9.cxd5 Re8 10.Nd2 Na6 11.f3 Nc7 12.a4 b6 13.Nc4 Ba6 14.Bg5 Qd7 15.Kh1 h6 
16.Bd2 Bxc4 17.Bxc4 a6 18.Qe2 Qe7 19.Rae1 Nd7 20.f4 Qh4 21.Qf3 Rab8 22.g3 
Qd8 23.e5 b5 24.Bd3 c4 25.Bc2 b4 26.Ne4 dxe5 27.f5 Nxd5 28.fxg6 N7f6 29.
gxf7+ Kxf7 30.Qh5+ Kg8 31.Qg6 Qe7 32.Bxh6 Qf7 33.Nxf6+ Nxf6 34.Rxf6 Qxf6 
35.Qh7+ 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Hartoch, Robert"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "E75"]
[EventDate "1970.07.14"]
[PlyCount "36"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5 e6 8.Qd2 exd5 
9.exd5 Re8 10.Nf3 Bg4 11.O-O a6 12.h3 Bxf3 13.Bxf3 Nbd7 14.Qc2 Qb6 15.Bd2 
Re7 16.Rfe1 Rae8 17.Rxe7 Rxe7 18.a4 Ne8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Hort, Vlastimil"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "D02"]
[EventDate "1970.07.14"]
[PlyCount "35"]

1.d4 d5 2.Nf3 Nf6 3.g3 c6 4.Bg2 Bf5 5.O-O e6 6.c3 h6 7.Qb3 Qb6 8.Ne5 Nbd7 
9.Nxd7 Nxd7 10.Nd2 Nf6 11.Re1 Be7 12.e4 Nxe4 13.Nxe4 Bxe4 14.Bxe4 dxe4 15.
Rxe4 Qxb3 16.axb3 a6 17.b4 Kd7 18.Bd2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Jongsma, Alexander"]
[Black "Ciric, Dragoljub"]
[Result "0-1"]
[ECO "D40"]
[EventDate "1970.07.14"]
[PlyCount "95"]

1.c4 Nf6 2.Nf3 e6 3.d4 c5 4.e3 d5 5.Nc3 Nc6 6.Bd3 cxd4 7.exd4 Be7 8.O-O 
O-O 9.Bg5 b6 10.a3 Bb7 11.Re1 Rc8 12.cxd5 Nxd5 13.Bxe7 Ncxe7 14.Ne4 Nf5 
15.Ng3 Nh4 16.Nxh4 Qxh4 17.Be4 Ba8 18.Qd2 Nf6 19.Bxa8 Rxa8 20.Ne2 Rfd8 21.
Qe3 Rd7 22.Rac1 Rad8 23.h3 h6 24.Red1 Ne8 25.a4 Nd6 26.g4 Qf6 27.Kg2 Nc8 
28.Rc4 Ne7 29.Rdc1 g5 30.Qe4 Ng6 31.Rc8 Kg7 32.R1c7 Qe7 33.Rxd7 Qxd7 34.
Rxd8 Qxd8 35.Nc3 Qd6 36.Qe3 Qb4 37.Qd2 Nf4+ 38.Kh2 Qd6 39.Ne4 Qc6 40.f3 
Qxa4 41.h4 Qb5 42.hxg5 hxg5 43.d5 Qxd5 44.Qc3+ e5 45.Nxg5 Qd4 46.Qxd4 exd4
47.Kg3 Nd3 48.b3 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Polugaevsky, Lev"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "E73"]
[EventDate "1970.07.14"]
[PlyCount "97"]

1.c4 Nf6 2.Nc3 g6 3.e4 d6 4.d4 Bg7 5.Be2 O-O 6.Bg5 h6 7.Be3 e5 8.d5 Nbd7 
9.h4 Nc5 10.Qc2 h5 11.f3 c6 12.b4 Na6 13.a3 cxd5 14.cxd5 Bd7 15.Nh3 Qb8 
16.Nf2 b5 17.Nd3 Nc7 18.O-O Qb7 19.Nc1 Rac8 20.Qd2 Na8 21.Nb3 Nb6 22.Na5 
Qb8 23.Rfc1 Rc7 24.Rc2 Rfc8 25.Rac1 a6 26.Bf1 Ne8 27.Qf2 Na8 28.Qd2 Nb6 
29.Qf2 Na8 30.g3 Bf8 31.Kh2 Ng7 32.Bh3 f5 33.Nc6 Qb7 34.Na5 Qb8 35.Nc6 Qb7
36.Na7 Re8 37.Nd1 Rxc2 38.Rxc2 Be7 39.Nc6 Bf6 40.Na5 Qb8 41.Ba7 Qd8 42.Nc6
Bxc6 43.dxc6 f4 44.Nc3 Kh7 45.Nd5 fxg3+ 46.Qxg3 Bxh4 47.Qg2 Bg5 48.c7 Nxc7
49.Rxc7 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.29"]
[Round "13"]
[White "Scholl, Eduard"]
[Black "Uhlmann, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A08"]
[EventDate "1970.07.14"]
[PlyCount "88"]

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 b5 
9.e5 Nd7 10.Nf1 a5 11.h4 b4 12.Bf4 Ba6 13.N1h2 a4 14.a3 Bb5 15.c3 Na5 16.
Bg5 Nb3 17.Rb1 bxc3 18.bxc3 Rb8 19.Ng4 Rb6 20.Qc2 d4 21.c4 Bc6 22.Ngh2 Re8
23.g4 Bxg5 24.Nxg5 Bxg2 25.Kxg2 Nxe5 26.Rxe5 f6 27.Re4 fxg5 28.hxg5 Qxg5 
29.f4 Qh4 30.Qe2 h6 31.f5 Qf6 32.Nf3 h5 33.gxh5 Qxf5 34.Ne5 Rb7 35.Rg4 Rf8
36.Rg3 Na5 37.Rxb7 Nxb7 38.h6 g5 39.Nf3 Rf6 40.Nxg5 Kh8 41.Ne4 Rxh6 42.Qg4
Qxg4 43.Rxg4 Kh7 44.Kf3 Rh3+ 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Ciric, Dragoljub"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[ECO "C72"]
[EventDate "1970.07.14"]
[PlyCount "59"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O-O Bg4 6.h3 h5 7.d4 b5 8.Bb3 Nxd4 
9.hxg4 hxg4 10.Ng5 Nh6 11.f4 d5 12.Bxd5 Bc5 13.Be3 Qd6 14.b4 Bb6 15.c4 
bxc4 16.Na3 Ndf5 17.Bf2 g3 18.Nxc4 gxf2+ 19.Rxf2 Bxf2+ 20.Kxf2 Qxb4 21.
Bc6+ Ke7 22.Qd7+ Kf8 23.exf5 Qxc4 24.Bxa8 Ng4+ 25.Kf3 Qxf4+ 26.Ke2 Qe3+ 
27.Kd1 Rh1+ 28.Kc2 Qc5+ 29.Kb3 Qb6+ 30.Kc2 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Donner, Jan"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]
[ECO "E44"]
[EventDate "1970.07.14"]
[PlyCount "98"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 c5 6.d5 d6 7.a3 Bxc3+ 8.Nxc3 e5 
9.Bd3 Qe7 10.e4 O-O 11.h4 a6 12.f3 Ne8 13.g4 Ra7 14.b4 cxb4 15.axb4 Nc7 
16.Be3 Rb7 17.Qd2 Nd7 18.Qf2 a5 19.bxa5 Na6 20.axb6 Ndc5 21.Ke2 Bd7 22.
Rhb1 Rfb8 23.Qe1 Rxb6 24.Rxb6 Rxb6 25.Nb5 h6 26.g5 hxg5 27.hxg5 Qe8 28.Qh4
Rxb5 29.cxb5 Bxb5 30.Rh1 Bxd3+ 31.Kf2 Kf8 32.Qh8+ Ke7 33.Qxg7 Bxe4 34.fxe4
Nxe4+ 35.Kf3 Qb5 36.g6 Qxd5 37.Qxf7+ Qxf7+ 38.gxf7 Nf6 39.Ra1 Nc5 40.Ra7+ 
Ncd7 41.Bg5 Kf8 42.Kg3 Kg7 43.Kh4 Nf8 44.Kh3 Kg6 45.Bh4 N8h7 46.Kg3 Nf8 
47.Ra8 N6d7 48.Be7 Kxf7 49.Bxd6 Nh7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Hartoch, Robert"]
[Black "Geller, Efim"]
[Result "0-1"]
[ECO "E73"]
[EventDate "1970.07.14"]
[PlyCount "152"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c6 7.Qd2 a6 8.Nf3 b5 9.
a3 Bg4 10.cxb5 axb5 11.O-O Nbd7 12.h3 Bxf3 13.Bxf3 Qb6 14.Rfe1 e6 15.e5 
dxe5 16.dxe5 Nd5 17.Bxd5 cxd5 18.Be7 Rfc8 19.Qf4 Rc4 20.Qg3 Rac8 21.Rad1 
Qb7 22.Bd6 Nb8 23.Rd3 Na6 24.Ne2 Nc5 25.Bxc5 R8xc5 26.Nd4 Rc1 27.f4 b4 28.
Kh2 bxa3 29.Rb3 Qc8 30.Rxa3 Rxe1 31.Qxe1 Bf8 32.Rc3 Rc4 33.Rxc4 Qxc4 34.
Qc3 Qf1 35.Nf3 h6 36.Qd4 Qc1 37.Qd2 Qc4 38.Qd4 Qb5 39.Kg3 Bc5 40.Qc3 Qb6 
41.b3 Bb4 42.Qd3 Qc7 43.Qd4 Bc5 44.Qd3 Bb4 45.Qd4 Ba3 46.Qd3 Qc1 47.Qd2 
Qb1 48.Qc3 Qe4 49.Qd2 Kg7 50.Qc3 Be7 51.Qc7 Bb4 52.Qd8 Bf8 53.Qb6 Be7 54.
Qc7 Qb4 55.Qc2 Bc5 56.Qd3 Bb6 57.h4 h5 58.Nd2 Qc5 59.Nf3 Qf2+ 60.Kh2 Be3 
61.f5 gxf5 62.Qd1 Bf4+ 63.Kh1 Qb2 64.Kg1 Kg6 65.Qd3 Bg3 66.Qd1 Qc3 67.Kh1 
Bf4 68.Kg1 d4 69.Kf1 d3 70.Ne1 d2 71.Nf3 Qd3+ 72.Kg1 Be3+ 73.Kh2 Qc3 74.
Qe2 Bf4+ 75.g3 Qc2 76.Nd4 Qe4 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Janosevic, Dragoljub"]
[Black "Jongsma, Alexander"]
[Result "1-0"]
[ECO "B33"]
[EventDate "1970.07.14"]
[PlyCount "109"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 
b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 Bg5 12.Nc2 O-O 13.a4 bxa4 14.Rxa4 a5 15.
Bc4 Bd7 16.b3 Ne7 17.Ra3 Rc8 18.Qd3 Nxd5 19.Bxd5 Qb6 20.O-O Kh8 21.c4 Qc5 
22.Raa1 Rb8 23.Qc3 Bd8 24.Ne3 Rb4 25.Rab1 g6 26.Nc2 Rb8 27.Ne1 Bb6 28.Nd3 
Qc7 29.Kh1 Bd4 30.Qd2 Kg7 31.f4 f6 32.f5 g5 33.Rfc1 Qa7 34.Qa2 Rfc8 35.Qa3
Bc5 36.Nxc5 dxc5 37.Ra1 a4 38.bxa4 Qa5 39.Qd3 Rd8 40.h4 h6 41.Qe3 Rb4 42.
Qe1 Be8 43.Kh2 Rd6 44.Ra3 Ra6 45.Rb1 Qb6 46.Rd1 Raxa4 47.Rg3 Bh5 48.Be6 
Bxd1 49.Qxd1 Qb8 50.Qd7+ Kh8 51.Qe7 Ra7 52.Qxf6+ Rg7 53.Qxh6+ Rh7 54.Qf6+ 
Rg7 55.Rxg5 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Langeweg, Christian"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[ECO "A56"]
[EventDate "1970.07.14"]
[PlyCount "79"]

1.d4 Nf6 2.c4 c5 3.dxc5 e6 4.Nf3 Bxc5 5.e3 d5 6.a3 a5 7.Nc3 Nc6 8.Be2 Ne4 
9.cxd5 Nxc3 10.bxc3 exd5 11.a4 Bf5 12.Ba3 Qe7 13.Bxc5 Qxc5 14.Qb3 O-O 15.
O-O Be4 16.Qa3 b6 17.Nd4 Rfc8 18.f3 Bg6 19.Qxc5 bxc5 20.Nb5 Rd8 21.Rfd1 
Rd7 22.Ra2 Rad8 23.Rad2 f6 24.Na3 Ne7 25.Bb5 Ra7 26.e4 Bf7 27.exd5 Rxd5 
28.Rxd5 Bxd5 29.c4 Bc6 30.Rd8+ Kf7 31.Bxc6 Nxc6 32.Rc8 Ne5 33.Rxc5 Ke6 34.
f4 Nd3 35.f5+ Ke7 36.Rb5 g6 37.g4 Ne5 38.h3 Rd7 39.Rxa5 Rd2 40.Ra7+ 
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Ree, Hans"]
[Black "Uhlmann, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D91"]
[EventDate "1970.07.14"]
[PlyCount "81"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 Ne4 6.cxd5 Nxg5 7.Nxg5 e6 8.Nf3 
exd5 9.e3 O-O 10.Be2 c6 11.b4 Be6 12.O-O Nd7 13.a4 f5 14.Qd2 g5 15.b5 g4 
16.Ne1 c5 17.Nd3 cxd4 18.exd4 Rc8 19.Rac1 Rc4 20.Nf4 Rxd4 21.Qxd4 Bxd4 22.
Nxe6 Qf6 23.Nxf8 Kxf8 24.Nxd5 Qe5 25.Rc8+ Kg7 26.Bc4 Kh6 27.Rc7 Nb6 28.Re7
Qd6 29.Rfe1 Qc5 30.R1e6+ Kg5 31.Nxb6 axb6 32.Bd3 Bxf2+ 33.Kf1 g3 34.hxg3 
Bxg3 35.Ke2 Qc3 36.Ke3 Bf4+ 37.Kf2 Qxd3 38.Rg7+ Kh4 39.Rxh7+ Kg4 40.Rg6+ 
Bg5 41.Rhg7 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Spassky, Boris"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[ECO "B96"]
[EventDate "1970.07.14"]
[PlyCount "34"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Nbd7 8.Qf3 
Qc7 9.O-O-O b5 10.e5 Bb7 11.Qh3 dxe5 12.Nxe6 fxe6 13.Qxe6+ Be7 14.Bxf6 
gxf6 15.Be2 h5 16.Nd5 Bxd5 17.Rxd5 Nb6 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.07.30"]
[Round "14"]
[White "Tringov, Georgi"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[ECO "C93"]
[EventDate "1970.07.14"]
[PlyCount "38"]

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 h6 10.d4 Re8 11.Nbd2 Bf8 12.Nf1 Bb7 13.Ng3 Na5 14.Bc2 Nc4 15.b3 Nb6 
16.Bb2 c5 17.dxe5 dxe5 18.c4 Nbd7 19.Bd3 b4 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Csom, Istvan"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "B22"]
[EventDate "1970.07.14"]
[PlyCount "68"]

1.e4 c5 2.c3 e6 3.d4 d5 4.exd5 exd5 5.Nf3 Nc6 6.Be2 Nf6 7.O-O Be7 8.dxc5 
Bxc5 9.Nbd2 O-O 10.Nb3 Bb6 11.Bg5 Re8 12.Qd3 h6 13.Bxf6 Qxf6 14.Rae1 Bf5 
15.Qd2 Be4 16.Nbd4 Re7 17.Bd1 Rae8 18.b4 Nxd4 19.Nxd4 Qg5 20.Qxg5 hxg5 21.
Bb3 Bd3 22.Rxe7 Rxe7 23.Rd1 Bxd4 24.cxd4 Bc4 25.Bxc4 dxc4 26.d5 b5 27.Kf1 
f6 28.a4 bxa4 29.Rd4 a3 30.Rxc4 a2 31.Rc1 Rc7 32.Rd1 Rc2 33.d6 Rd2 34.Rc1 
Kf7 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Geller, Efim"]
[Black "Ree, Hans"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1970.07.14"]
[PlyCount "111"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 c5 6.Nf3 d6 7.O-O Nc6 8.d5 Na5 
9.Nd2 e5 10.e4 Ng4 11.h3 Nh6 12.b3 f5 13.exf5 gxf5 14.Bb2 b6 15.f4 Bd7 16.
Qc2 Qf6 17.Ne2 Qg6 18.Nf3 e4 19.Nh4 Qf7 20.Bxg7 Qxg7 21.Qc3 a6 22.Qxg7+ 
Kxg7 23.Rfc1 b5 24.Nc3 Rab8 25.Nd1 bxc4 26.bxc4 Rb4 27.Bf1 Rfb8 28.Ne3 Rb2
29.Rc3 R8b6 30.Ra3 Nb7 31.Re1 a5 32.Be2 Rb1 33.Rxb1 Rxb1+ 34.Kf2 a4 35.Bd1
Rb4 36.g4 fxg4 37.hxg4 Na5 38.g5 Nf7 39.Rc3 Rb2+ 40.Rc2 a3 41.Rxb2 axb2 
42.Bc2 Bc8 43.Bxe4 Ba6 44.Bb1 Kg8 45.Nhf5 Nxc4 46.Nxc4 Bxc4 47.Ne3 Ba6 48.
Kf3 Kg7 49.a4 Bb7 50.Nf5+ Kf8 51.Ke4 Ba6 52.a5 Bb7 53.Ne3 Kg7 54.Kd3 h6 
55.Nf5+ Kh7 56.Kc3 1-0

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Gligoric, Svetozar"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "D56"]
[EventDate "1970.07.14"]
[PlyCount "31"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 h6 7.Bh4 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 b6 13.O-O Bb7 14.Qe2 Nd7 
15.Ba6 Bxa6 16.Qxa6 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Hort, Vlastimil"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "D79"]
[EventDate "1970.07.14"]
[PlyCount "29"]

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 d5 5.c4 c6 6.cxd5 cxd5 7.O-O O-O 8.Ne5 
Nc6 9.Nc3 Bd7 10.Nxc6 Bxc6 11.Bf4 e6 12.Be5 Qb6 13.Qb3 Qxb3 14.axb3 Rfc8 
15.Rfc1 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Jongsma, Alexander"]
[Black "Tringov, Georgi"]
[Result "1/2-1/2"]
[ECO "E61"]
[EventDate "1970.07.14"]
[PlyCount "36"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.Bg5 d6 6.h3 Nbd7 7.e3 c6 8.Be2 a6 
9.O-O b5 10.Nd2 Bb7 11.Rc1 bxc4 12.Nxc4 c5 13.dxc5 Nxc5 14.Bf3 Rb8 15.Bxb7
Rxb7 16.b3 Qa8 17.Qf3 Ra7 18.Qxa8 Rfxa8 1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Polugaevsky, Lev"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[ECO "E16"]
[EventDate "1970.07.14"]
[PlyCount "16"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7 7.Nc3 O-O 8.O-O d5
1/2-1/2

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Scholl, Eduard"]
[Black "Janosevic, Dragoljub"]
[Result "0-1"]
[ECO "B48"]
[EventDate "1970.07.14"]
[PlyCount "66"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Bd3 Nf6 8.O-O 
b5 9.Nxc6 Qxc6 10.a3 Bb7 11.Qe2 Be7 12.f4 O-O 13.e5 Nd5 14.Nxd5 Qxd5 15.
Rad1 Qc6 16.b4 d6 17.exd6 Bxd6 18.Bd4 Rfd8 19.Rf3 Bc7 20.Bb2 Qb6+ 21.Rf2 
f5 22.Kh1 Bd5 23.Rc1 Rac8 24.Rff1 Qc6 25.a4 bxa4 26.Bxa6 Rb8 27.c4 Be4 28.
Bb5 Qd6 29.Rcd1 Qxb4 30.Bd4 Rxb5 31.Bxg7 Rbb8 32.Bf6 Rxd1 33.Qxd1 Qb1 0-1

[Event "10th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1970.08.01"]
[Round "15"]
[White "Uhlmann, Wolfgang"]
[Black "Ciric, Dragoljub"]
[Result "1/2-1/2"]
[ECO "D14"]
[EventDate "1970.07.14"]
[PlyCount "22"]

1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nc6 5.Nf3 Nf6 6.Bf4 Bf5 7.e3 e6 8.Bd3 
Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 1/2-1/2

