[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Donner, Jan"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2500"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "A75"]
[EventDate "1972.??.??"]
[PlyCount "114"]

1.d4 c5 2.d5 Nf6 3.c4 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.e4 Bg7 8.Be2 O-O 
9.O-O a6 10.a4 Bg4 11.Nd2 Bxe2 12.Qxe2 Nbd7 13.Nc4 Nb6 14.Ne3 Qe7 15.a5 
Nbd7 16.Nc4 Ne5 17.Nb6 Rae8 18.Bg5 Qc7 19.f3 h6 20.Bd2 Ned7 21.Nc4 Ne5 22.
Ne3 Nh5 23.g3 Nf6 24.Kg2 Re7 25.Na4 Qd7 26.Nc3 Rb8 27.Rfe1 Qc7 28.f4 Ned7 
29.Qd3 b5 30.axb6 Nxb6 31.Rxa6 c4 32.Qc2 Rbe8 33.e5 dxe5 34.fxe5 Rxe5 35.
Rxb6 Qxb6 36.Nxc4 Qd4 37.Nxe5 Rxe5 38.Rxe5 Qxe5 39.Qd3 Nd7 40.Bf4 Qe1 41.
Qe3 Qxe3 42.Bxe3 Kf8 43.Ne4 Bxb2 44.Bxh6+ Ke7 45.Bg5+ f6 46.Be3 Be5 47.Kf3
f5 48.Nc5 Nf6 49.Nd3 Kd6 50.Bf4 Bxf4 51.Kxf4 Nxd5+ 52.Kg5 Ne3 53.Ne1 Kd5 
54.Nf3 Ke4 55.Nd2+ Kd3 56.Nf3 Ke4 57.Nd2+ Kd3 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Ivkov, Borislav"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2560"]
[BlackElo "2510"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1972.??.??"]
[PlyCount "39"]

1.Nf3 Nf6 2.c4 c5 3.Nc3 g6 4.g3 b6 5.Bg2 Bb7 6.O-O Bg7 7.b3 d5 8.cxd5 Nxd5
9.Bb2 O-O 10.Qc1 Nc6 11.Nxd5 Qxd5 12.Bxg7 Kxg7 13.Qb2+ f6 14.Rfd1 Rfb8 15.
e3 e5 16.d4 exd4 17.Nxd4 Qd7 18.Bxc6 Bxc6 19.Nxc6 Qxc6 20.Rd2 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Korchnoi, Viktor"]
[Black "Szabo, Laszlo"]
[WhiteElo "2670"]
[BlackElo "2525"]
[Result "1/2-1/2"]
[ECO "A28"]
[EventDate "1972.??.??"]
[PlyCount "96"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 O-O 6.Bd3 Bxc3 7.dxc3 d6 8.O-O 
Qe7 9.Nd2 a5 10.Re1 g6 11.e4 Nh5 12.Nf1 Nf4 13.Ne3 Qg5 14.f3 Ne7 15.Bf1 h5
16.g3 h4 17.Ng4 hxg3 18.hxg3 Bxg4 19.gxf4 Qh4 20.Qf2 Qxf2+ 21.Kxf2 Bh5 22.
fxe5 dxe5 23.Bh6 Rfe8 24.Rad1 f6 25.Rd7 g5 26.Rxc7 Rad8 27.c5 Rd2+ 28.Re2 
Rd3 29.Re3 Rd2+ 30.Re2 Rd3 31.Rc2 Rxf3+ 32.Kg2 Rf4 33.Bb5 Bf3+ 34.Kg1 Rd8 
35.Bc4+ Kh7 36.Rxe7+ Kxh6 37.Rh2+ Rh4 38.Bd5 Rxh2 39.Kxh2 f5 40.Rxb7 g4 
41.c6 Rh8 42.Kg3 f4+ 43.Kf2 Bd1 44.c7 g3+ 45.Kg2 Kg5 46.Rb8 Rh2+ 47.Kg1 
Bf3 48.Rg8+ Kf6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Padevsky, Nikola"]
[Black "Enklaar, Bertus"]
[WhiteElo "2460"]
[Result "1-0"]
[ECO "B43"]
[EventDate "1972.??.??"]
[PlyCount "103"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.g3 Bb4 7.Ne2 Nf6 8.Bg2 d6
9.Bf4 e5 10.Bg5 Nbd7 11.O-O h6 12.Bd2 Bc5 13.h3 O-O 14.a4 Re8 15.g4 Nf8 
16.Ng3 Bd4 17.Nf5 Bxf5 18.exf5 e4 19.h4 d5 20.g5 hxg5 21.hxg5 N6h7 22.Nxd5
Qc5 23.c4 Qxc4 24.Ne3 Qc8 25.Qg4 Qd8 26.Bxe4 Qxg5 27.Qxg5 Nxg5 28.Bxb7 
Rab8 29.Bc6 Bxb2 30.Rab1 Red8 31.Ba5 Rdc8 32.Bg2 Nd7 33.Nd5 Ba3 34.Bc7 
Rxb1 35.Rxb1 f6 36.a5 Nf7 37.Rb7 Re8 38.Ne3 Nc5 39.Ra7 Ne5 40.Bd5+ Kh7 41.
Bd6 Rd8 42.Bxe5 fxe5 43.f6 Rd7 44.f7 Rd8 45.Nc4 Bb4 46.Nxe5 Rf8 47.Rc7 g5 
48.Rc6 Rd8 49.Rf6 Nd7 50.Be4+ Kg7 51.Rg6+ Kh8 52.Nxd7 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Polugaevsky, Lev"]
[Black "Malich, Burkhard"]
[WhiteElo "2640"]
[BlackElo "2450"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1972.??.??"]
[PlyCount "75"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 c6 4.b3 Bg4 5.Bb2 Nbd7 6.d3 e6 7.Nbd2 Be7 8.O-O 
O-O 9.e4 a5 10.a3 Ne8 11.h3 Bh5 12.Qe1 Nc7 13.Nd4 c5 14.Ne2 Bxe2 15.Qxe2 
a4 16.f4 Nb6 17.d4 axb3 18.cxb3 dxe4 19.Nxe4 cxd4 20.Rfd1 Nbd5 21.Rxd4 f5 
22.Nf2 Bf6 23.Rd3 Qd6 24.b4 h6 25.Re1 Qb6 26.Kh2 Kh8 27.Nd1 Qa6 28.Bxf6 
Nxf6 29.Qd2 Ncd5 30.Nc3 Nxc3 31.Qxc3 Rfd8 32.Red1 Rxd3 33.Rxd3 Ne4 34.Qc2 
Qb6 35.Rd7 Qe3 36.Bxe4 Rxa3 37.Rd8+ Kh7 38.Bxf5+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Ree, Hans"]
[Black "Langeweg, Christian"]
[WhiteElo "2430"]
[BlackElo "2425"]
[Result "1/2-1/2"]
[ECO "A32"]
[EventDate "1972.??.??"]
[PlyCount "51"]

1.c4 Nf6 2.g3 e6 3.Bg2 c5 4.Nf3 Nc6 5.d4 cxd4 6.Nxd4 a6 7.O-O Be7 8.Nc3 
O-O 9.b3 Qa5 10.Bb2 Rd8 11.Rc1 d5 12.cxd5 exd5 13.Nxc6 bxc6 14.Na4 Bb7 15.
Qd4 Re8 16.e3 Bf8 17.Nc5 Bc8 18.Qa4 Qb5 19.Bxf6 gxf6 20.Qd4 a5 21.Na4 Ba3 
22.Rcd1 Kg7 23.Qh4 Bf5 24.Rd4 Bg6 25.Rfd1 Re5 26.Qg4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Robatsch, Karl"]
[Black "Timman, Jan"]
[WhiteElo "2460"]
[BlackElo "2445"]
[Result "1-0"]
[ECO "B08"]
[EventDate "1972.??.??"]
[PlyCount "125"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4 7.Be3 Nc6 8.h3 
Bxf3 9.Bxf3 Re8 10.Re1 a6 11.Ne2 e5 12.d5 Ne7 13.g4 Rf8 14.Ng3 c6 15.c4 b5
16.b3 Nd7 17.Qd2 Nc5 18.Red1 cxd5 19.cxd5 f5 20.Bxc5 dxc5 21.d6 fxg4 22.
Bxg4 h5 23.Be2 Kh7 24.dxe7 Qxe7 25.Bf1 Rad8 26.Qe2 Rd4 27.Bg2 Bh6 28.Nf1 
Rfd8 29.Ne3 Bxe3 30.fxe3 Rxd1+ 31.Rxd1 Rxd1+ 32.Qxd1 c4 33.bxc4 bxc4 34.
Qc2 Qb4 35.Bf1 c3 36.Bd3 a5 37.Qb3 Qc5 38.Kf2 Kh6 39.Bc4 Qc6 40.Qxc3 Qxe4 
41.Qd3 Qh4+ 42.Kg2 Qg5+ 43.Kf1 Qh4 44.e4 Qf4+ 45.Ke2 Qh2+ 46.Kd1 Qg1+ 47.
Kc2 Qc5 48.Qd2+ Kg7 49.Qd5 Qf2+ 50.Kb3 Qb6+ 51.Bb5 Qe3+ 52.Qd3 Qc5 53.a3 
h4 54.Ka4 g5 55.Kxa5 Qa7+ 56.Kb4 Qe7+ 57.Kb3 Qf7+ 58.Kb2 Qf2+ 59.Kb3 Qf7+ 
60.Qd5 Qf3+ 61.Kb4 Qf8+ 62.Ka4 Kf6 63.Bd7 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "1"]
[White "Uhlmann, Wolfgang"]
[Black "Hartoch, Robert"]
[WhiteElo "2570"]
[BlackElo "2400"]
[Result "1/2-1/2"]
[ECO "A21"]
[EventDate "1972.??.??"]
[PlyCount "63"]

1.c4 e5 2.Nc3 f5 3.d4 e4 4.Nh3 Nf6 5.e3 g6 6.Be2 Bg7 7.b4 Nc6 8.Qb3 Ne7 9.
c5 d5 10.cxd6 cxd6 11.Bb5+ Kf8 12.Be2 Bh6 13.O-O Kg7 14.d5 g5 15.Bb2 Ng6 
16.Nb5 g4 17.Nf4 Bxf4 18.exf4 Nxf4 19.Rfe1 Kg6 20.Rac1 Rf8 21.Nc7 Rb8 22.
Bf1 Qe7 23.f3 Bd7 24.fxe4 Nxe4 25.Qe3 Qg5 26.Rc4 Rbc8 27.Bc1 Nh5 28.Qxg5+ 
Nxg5 29.Re7 Nf6 30.Bf4 Nge4 31.Ne6 Bxe6 32.Rxe6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Browne, Walter Shawn"]
[Black "Korchnoi, Viktor"]
[WhiteElo "2500"]
[BlackElo "2670"]
[Result "1/2-1/2"]
[ECO "B46"]
[EventDate "1972.??.??"]
[PlyCount "92"]

1.e4 c5 2.Nf3 e6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 d6 6.g3 a6 7.Bg2 Bd7 8.O-O Be7
9.Re1 Nf6 10.Nxc6 Bxc6 11.a4 O-O 12.a5 Qc7 13.Be3 Nd7 14.Na4 Rad8 15.Nb6 
Nf6 16.Bf4 Nd7 17.Be3 Nf6 18.Bd4 d5 19.exd5 Bxd5 20.Nxd5 Nxd5 21.c3 Bc5 
22.Be5 Bd6 23.Qe2 Rd7 24.Rad1 Rfd8 25.Bxd5 Bxe5 26.Qxe5 Qxe5 27.Rxe5 Kf8 
28.c4 exd5 29.Rexd5 Rxd5 30.cxd5 Ke7 31.Rd3 Kd6 32.Kg2 Re8 33.Kf3 Re5 34.
Rb3 Re7 35.Rb6+ Kxd5 36.Kf4 Kc5 37.h4 Rd7 38.h5 h6 39.Kf5 Kc4 40.f4 Rd5+ 
41.Kg4 Rb5 42.Rd6 f5+ 43.Kh3 Rxa5 44.Rd7 Rb5 45.Rc7+ Kd5 46.Rxg7 Rxb2 
1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Enklaar, Bertus"]
[Black "Ivkov, Borislav"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "A90"]
[EventDate "1972.??.??"]
[PlyCount "113"]

1.d4 e6 2.c4 f5 3.g3 Nf6 4.Bg2 c6 5.Nf3 d5 6.O-O Bd6 7.b3 Qe7 8.Bb2 O-O 9.
Nbd2 Bd7 10.Ne5 Be8 11.f3 Bh5 12.Qc2 Nbd7 13.Kh1 Rac8 14.e3 Bc7 15.a4 Rfd8
16.Rfc1 Qe8 17.c5 Nxe5 18.dxe5 Nd7 19.f4 a5 20.Bd4 Rb8 21.Qc3 Qe7 22.Bf1 
Rdc8 23.Ra2 Be8 24.Nf3 Ra8 25.Ne1 Bh5 26.Kg2 b6 27.Nd3 Qd8 28.Rac2 Be8 29.
Be2 bxc5 30.Nxc5 Nxc5 31.Bxc5 Bb6 32.Qd4 Rcb8 33.Rc3 Ra7 34.Rd1 Bxc5 35.
Qxc5 Qe7 36.Rdd3 Qxc5 37.Rxc5 Kf7 38.Kf2 Ke7 39.Ke1 Rb6 40.Kd2 Kd8 41.Kc3 
Kc7 42.Kb2 h5 43.Ka3 g6 44.Rdc3 Bd7 45.Rc1 Ra8 46.h3 Rab8 47.R1c3 Ra8 48.
Bd1 Rbb8 49.Rc2 Kb6 50.Rc1 Rb7 51.b4 axb4+ 52.Kxb4 Rba7 53.Bb3 Ra5 54.R1c2
R8a7 55.R2c3 Ra8 56.Rc2 R8a7 57.R2c3 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Langeweg, Christian"]
[Black "Uhlmann, Wolfgang"]
[WhiteElo "2425"]
[BlackElo "2570"]
[Result "1/2-1/2"]
[ECO "A12"]
[EventDate "1972.??.??"]
[PlyCount "36"]

1.Nf3 Nf6 2.g3 d5 3.c4 c6 4.b3 Bg4 5.Bg2 g6 6.Bb2 Bg7 7.O-O O-O 8.d3 Bxf3 
9.Bxf3 Nbd7 10.Nd2 e6 11.b4 Qe7 12.a4 a6 13.Qb3 b5 14.axb5 axb5 15.c5 Rfc8
16.Ra2 Ne8 17.Rfa1 Rxa2 18.Rxa2 Nc7 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Ljubojevic, Ljubomir"]
[Black "Ree, Hans"]
[WhiteElo "2510"]
[BlackElo "2430"]
[Result "1/2-1/2"]
[ECO "C44"]
[EventDate "1972.??.??"]
[PlyCount "41"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5 5.exd5 Qxd5 6.cxd4 Bg4 7.Be2 Bb4+ 8.
Nc3 Bxf3 9.Bxf3 Qc4 10.Qb3 Qxb3 11.axb3 Nge7 12.O-O a6 13.Ra4 Bd6 14.Bg5 
f6 15.Bh5+ Ng6 16.Re1+ Ne7 17.Bd2 O-O-O 18.g3 Kb8 19.Ne4 Nd5 20.Ra5 Bb4 
21.Bxb4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Malich, Burkhard"]
[Black "Hartoch, Robert"]
[WhiteElo "2450"]
[BlackElo "2400"]
[Result "1/2-1/2"]
[ECO "E90"]
[EventDate "1972.??.??"]
[PlyCount "59"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 Bg7 5.e4 d6 6.Nf3 O-O 7.Bf4 a6 8.a4 Qa5 9.
Nd2 Qc7 10.Be2 e5 11.Be3 Kh8 12.g4 Ng8 13.h4 f5 14.f3 f4 15.Bf2 a5 16.g5 
h5 17.Bf1 Na6 18.Nb3 b6 19.Bh3 Bxh3 20.Rxh3 Qd7 21.Rh1 Rf7 22.Kd2 Ne7 23.
Nc1 Nc8 24.Nb5 Ne7 25.Ne2 Re8 26.Nec3 Nc8 27.Qf1 Bf8 28.Qh3 Qxh3 29.Rxh3 
Be7 30.Ra3 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Polugaevsky, Lev"]
[Black "Robatsch, Karl"]
[WhiteElo "2640"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A16"]
[EventDate "1972.??.??"]
[PlyCount "99"]

1.c4 Nf6 2.Nf3 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Bg7 6.Bg2 e5 7.O-O O-O 8.Nxd5 
Qxd5 9.d3 Nc6 10.Be3 Qb5 11.Qd2 e4 12.Ne1 Qxb2 13.Qxb2 Bxb2 14.Rb1 Bg7 15.
Bxe4 Nd4 16.Bxd4 Bxd4 17.Bxb7 Rb8 18.Nf3 Bxf2+ 19.Kxf2 Bxb7 20.Ne5 Bd5 21.
a4 Rbd8 22.Rfc1 Rfe8 23.Ng4 Rd6 24.e4 Bxe4 25.dxe4 Rxe4 26.Kf3 Rxa4 27.
Rxc7 h5 28.Ne5 Rf6+ 29.Ke3 Ra3+ 30.Kd4 Ra4+ 31.Kd3 Ra3+ 32.Kc4 Ra4+ 33.Rb4
Rxb4+ 34.Kxb4 Rf5 35.Nd3 a5+ 36.Kc4 Rf1 37.Kd4 a4 38.Ke3 a3 39.Ra7 Ra1 40.
Nb4 Rb1 41.Nc2 g5 42.Nxa3 Rh1 43.Nc4 Rxh2 44.Nd6 Rg2 45.Kf3 Rh2 46.Nxf7 
g4+ 47.Ke4 h4 48.Nh6+ Kh8 49.Nxg4 Re2+ 50.Kf5 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Szabo, Laszlo"]
[Black "Padevsky, Nikola"]
[WhiteElo "2525"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A14"]
[EventDate "1972.??.??"]
[PlyCount "53"]

1.Nf3 Nf6 2.c4 e6 3.b3 d5 4.Bb2 Be7 5.g3 O-O 6.Bg2 c5 7.O-O Nc6 8.e3 b6 9.
Qe2 Bb7 10.Rd1 Qc7 11.Nc3 Rfd8 12.cxd5 Nxd5 13.Nxd5 Rxd5 14.d4 Rd7 15.dxc5
Bxc5 16.Ng5 Rxd1+ 17.Rxd1 h6 18.Ne4 Bf8 19.Nf6+ gxf6 20.Qg4+ Kh7 21.Be4+ 
f5 22.Bxf5+ exf5 23.Qxf5+ Kg8 24.Rd7 Qxd7 25.Qxd7 Rb8 26.Qg4+ Kh7 27.Qf5+ 
1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "2"]
[White "Timman, Jan"]
[Black "Donner, Jan"]
[WhiteElo "2445"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "B09"]
[EventDate "1972.??.??"]
[PlyCount "29"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Nc6 7.e5 dxe5 8.fxe5 
Nh5 9.Be3 f6 10.exf6 Nxf6 11.Bc4+ Kh8 12.Qd2 e5 13.dxe5 Qxd2+ 14.Bxd2 Ng4 
15.O-O 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Donner, Jan"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2500"]
[BlackElo "2640"]
[Result "1/2-1/2"]
[ECO "E56"]
[EventDate "1972.??.??"]
[PlyCount "82"]

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.Qd3 a6 11.Ne4 b5 12.Nxf6+ Qxf6 13.Qe4 Bb7 14.Bd3 g6 15.
dxc5 Rfd8 16.Be2 b4 17.Qf4 Qe7 18.Ng5 bxa3 19.bxa3 Bc7 20.Qh4 h5 21.Rb1 
Rab8 22.f4 Ba8 23.Rxb8 Nxb8 24.Qg3 Nd7 25.Bxh5 Nxc5 26.Bf3 Bxf3 27.Qxf3 
Nd3 28.Qc6 Qc5 29.Qxc5 Nxc5 30.Bb2 Bb6 31.Bd4 Na4 32.Bxb6 Nxb6 33.Rb1 Rd6 
34.Kf2 Kg7 35.Ke2 Rc6 36.Nf3 Nd5 37.Rb3 Rc2+ 38.Nd2 a5 39.g3 a4 40.Rd3 
Nc3+ 41.Kf3 f5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Hartoch, Robert"]
[Black "Langeweg, Christian"]
[WhiteElo "2400"]
[BlackElo "2425"]
[Result "1/2-1/2"]
[ECO "D46"]
[EventDate "1972.??.??"]
[PlyCount "48"]

1.c4 Nf6 2.Nf3 c6 3.d4 d5 4.Nc3 e6 5.e3 Nbd7 6.Bd3 Bb4 7.O-O O-O 8.a3 Ba5 
9.b4 Bc7 10.Bb2 Qe7 11.Qc2 dxc4 12.Bxc4 e5 13.Ne4 exd4 14.Nxf6+ Nxf6 15.
Bxd4 Bb6 16.Bb2 h6 17.Rad1 Be6 18.Bxe6 Qxe6 19.Nd4 Bxd4 20.Rxd4 Rfd8 21.
Rfd1 Rd5 22.Rxd5 Nxd5 23.Qd3 a6 24.Qd4 f6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Ivkov, Borislav"]
[Black "Szabo, Laszlo"]
[WhiteElo "2560"]
[BlackElo "2525"]
[Result "1/2-1/2"]
[ECO "E91"]
[EventDate "1972.??.??"]
[PlyCount "70"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 Bg4 7.Be3 Nfd7 8.Ng1 
Bxe2 9.Ngxe2 c5 10.O-O Nc6 11.d5 Na5 12.b3 a6 13.Rb1 Qb8 14.a4 e5 15.Qc2 
Qd8 16.Nc1 f5 17.f3 f4 18.Bf2 g5 19.Nd3 h5 20.Qe2 Rf6 21.Rfc1 Rg6 22.Be1 
g4 23.Nd1 Rc8 24.N1f2 b6 25.fxg4 Qg5 26.h3 Nf6 27.b4 cxb4 28.Rxb4 hxg4 29.
Nxg4 Nxg4 30.Qxg4 Qxg4 31.hxg4 Rxg4 32.Kf1 Bh6 33.Rc3 Rg7 34.Nb2 Rb7 35.
Bf2 Rcb8 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Korchnoi, Viktor"]
[Black "Timman, Jan"]
[WhiteElo "2670"]
[BlackElo "2445"]
[Result "1/2-1/2"]
[ECO "D78"]
[EventDate "1972.??.??"]
[PlyCount "92"]

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 c6 5.Bg2 d5 6.Qb3 O-O 7.O-O dxc4 8.Qxc4 
Bf5 9.Nc3 Nbd7 10.e3 Ne4 11.Qe2 e5 12.Rd1 Nxc3 13.bxc3 Qc7 14.e4 Bg4 15.h3
Bxf3 16.Bxf3 Rad8 17.Bg5 Rde8 18.Rab1 f5 19.Qc4+ Kh8 20.d5 Nb6 21.d6 Qd7 
22.Qe2 Na4 23.Qc2 Nc5 24.Be7 fxe4 25.Bg4 Rf5 26.Qe2 Bf8 27.Qc4 b6 28.Bxf5 
gxf5 29.Qf7 Bg7 30.h4 f4 31.Kh2 Nd3 32.Rxd3 exd3 33.gxf4 Rf8 34.Qh5 Rxf4 
35.f3 e4 36.fxe4 Qe6 37.Rg1 d2 38.d7 Qxd7 39.Rxg7 Rf2+ 40.Kg3 Kxg7 41.Kxf2
Qxe7 42.Qg4+ Kf7 43.Ke2 Qe6 44.Qf4+ Ke7 45.Qc7+ Qd7 46.Qe5+ Qe6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Padevsky, Nikola"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2460"]
[BlackElo "2500"]
[Result "1-0"]
[ECO "B23"]
[EventDate "1972.??.??"]
[PlyCount "75"]

1.e4 c5 2.Nc3 d6 3.f4 g6 4.Nf3 Bg7 5.Bb5+ Bd7 6.Bxd7+ Qxd7 7.O-O Nc6 8.d3 
Nf6 9.h3 O-O 10.Be3 b5 11.Qd2 b4 12.Ne2 Rab8 13.f5 c4 14.Bh6 b3 15.fxg6 
hxg6 16.Bxg7 Kxg7 17.dxc4 bxc2 18.Qxc2 Qb7 19.b3 Nb4 20.Qc3 Qxe4 21.Ned4 
Qd3 22.Qe1 Rb7 23.Rd1 Qe4 24.Qd2 Rbb8 25.Rde1 Qb7 26.Qg5 e6 27.Qh4 Rh8 28.
Qg3 Qd7 29.Ng5 e5 30.Nf5+ Kf8 31.Nh4 Kg7 32.Rxf6 Kxf6 33.Rf1+ Kg7 34.Rxf7+
Qxf7 35.Nxf7 Kxf7 36.Qxg6+ Ke7 37.Nf5+ Kd7 38.Qxd6+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Ree, Hans"]
[Black "Enklaar, Bertus"]
[WhiteElo "2430"]
[Result "1/2-1/2"]
[ECO "A13"]
[EventDate "1972.??.??"]
[PlyCount "33"]

1.c4 Nf6 2.g3 e6 3.Bg2 d5 4.Nf3 dxc4 5.Qa4+ Nbd7 6.Qxc4 a6 7.Qc2 c5 8.O-O 
b6 9.b3 Bb7 10.Bb2 Be7 11.d3 O-O 12.Nbd2 Rc8 13.Rac1 b5 14.Qb1 Qb6 15.Qa1 
Rfd8 16.Rfd1 Bf8 17.h3 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Robatsch, Karl"]
[Black "Malich, Burkhard"]
[WhiteElo "2460"]
[BlackElo "2450"]
[Result "1/2-1/2"]
[ECO "B83"]
[EventDate "1972.??.??"]
[PlyCount "42"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 Be7 7.O-O O-O 8.f4 
Nc6 9.Be3 Bd7 10.Qe1 Nxd4 11.Bxd4 Bc6 12.Bd3 Qd7 13.Rd1 a6 14.Bxf6 Bxf6 
15.e5 Be7 16.f5 exf5 17.Bxf5 Qc7 18.Nd5 Bxd5 19.Rxd5 dxe5 20.Qxe5 Qb6+ 21.
Kh1 Bf6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "3"]
[White "Uhlmann, Wolfgang"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2570"]
[BlackElo "2510"]
[Result "1/2-1/2"]
[ECO "A42"]
[EventDate "1972.??.??"]
[PlyCount "43"]

1.c4 g6 2.Nc3 Bg7 3.d4 d6 4.e4 Nd7 5.Be2 e5 6.Nf3 Nh6 7.O-O O-O 8.b3 Ng4 
9.d5 a5 10.Ne1 Nh6 11.Nd3 f5 12.f3 Nf7 13.Bd2 Qe7 14.a3 c5 15.Qc2 Nf6 16.
b4 axb4 17.axb4 Rxa1 18.Rxa1 cxb4 19.Nxb4 Bh6 20.Bxh6 Nxh6 21.Qd2 Nf7 22.
Qe3 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Browne, Walter Shawn"]
[Black "Ivkov, Borislav"]
[WhiteElo "2500"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "C95"]
[EventDate "1972.??.??"]
[PlyCount "61"]

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.d4 Nbd7 11.Nh4 Nb6 12.Nd2 c5 13.dxc5 dxc5 14.Nf5 c4 15.Bc2 Be6
16.Nf3 Nfd7 17.Nxe7+ Qxe7 18.Ng5 Nc5 19.Nxe6 Qxe6 20.Be3 Nba4 21.Qg4 Qxg4 
22.hxg4 Rac8 23.Rab1 Rfd8 24.Kf1 Nd3 25.Bxd3 Rxd3 26.Ke2 h6 27.Rec1 f6 28.
Rc2 Kf7 29.Rd1 Rcd8 30.Rdc1 Rc8 31.Rd1 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Enklaar, Bertus"]
[Black "Uhlmann, Wolfgang"]
[BlackElo "2570"]
[Result "0-1"]
[ECO "D91"]
[EventDate "1972.??.??"]
[PlyCount "108"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 Ne4 6.Bh4 Nxc3 7.bxc3 c5 8.e3 
Nc6 9.cxd5 Qxd5 10.Be2 cxd4 11.cxd4 e5 12.dxe5 Qa5+ 13.Qd2 Qxd2+ 14.Kxd2 
Nxe5 15.Rab1 O-O 16.Nd4 a6 17.Rhc1 Re8 18.f4 Nd7 19.Bf3 Rb8 20.a4 Bf8 21.
Rc4 a5 22.Be1 Nc5 23.Ke2 b6 24.Bc6 Bg4+ 25.Nf3 Red8 26.Rd4 Rdc8 27.Bb5 Bg7
28.Rc4 Be6 29.Rd4 Bxd4 30.exd4 Ne4 31.Ne5 Nc3+ 32.Bxc3 Rxc3 33.Kd2 Ra3 34.
Nc6 Rb7 35.Rb2 Bd5 36.g3 f6 37.Rc2 Ra2 38.Rxa2 Bxa2 39.Kd3 Rc7 40.Ke4 Kf8 
41.g4 Rd7 42.Kd3 Rd6 43.g5 Bd5 44.Na7 fxg5 45.fxg5 Bb7 46.Bc4 Rd8 47.Nb5 
Ke7 48.Nc3 Rf8 49.Bd5 Ba6+ 50.Ke3 Rc8 51.Ne4 Bc4 52.Nf6 Bxd5 53.Nxd5+ Kd6 
54.Nxb6 Rc6 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Ljubojevic, Ljubomir"]
[Black "Hartoch, Robert"]
[WhiteElo "2510"]
[BlackElo "2400"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1972.??.??"]
[PlyCount "119"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Bc4 d5 6.exd5 Nbd7 7.Nf3 O-O 8.O-O 
Nb6 9.Bb3 a5 10.a3 Nbxd5 11.Nxd5 Nxd5 12.Ne5 c6 13.c4 Nc7 14.Be3 Be6 15.
Rc1 f6 16.Nd3 Bf7 17.f5 g5 18.Qf3 Re8 19.Rfd1 Qc8 20.d5 a4 21.Ba2 Na6 22.
Bb1 Qd7 23.Nc5 Nxc5 24.Bxc5 cxd5 25.cxd5 Rac8 26.Be4 h5 27.h3 Bf8 28.Bb4 
Rxc1 29.Rxc1 Rc8 30.Rxc8 Qxc8 31.Qc3 Qd7 32.d6 exd6 33.Qxf6 Qe7 34.Qxe7 
Bxe7 35.Bxb7 Bb3 36.Kf2 Kf7 37.g4 hxg4 38.hxg4 Bd8 39.Bf3 Bf6 40.Bc3 Bxc3 
41.bxc3 Kf6 42.Ke1 Bf7 43.Bc6 Bb3 44.Kd2 Ke5 45.Bd7 Kf6 46.Be8 Ke5 47.Bb5 
Kf4 48.f6 Ke5 49.Bxa4 Bd5 50.Bc6 Be6 51.a4 Kxf6 52.a5 Bc8 53.Kd3 Ke7 54.
Kc4 Bxg4 55.Kb5 Bc8 56.a6 Bxa6+ 57.Kxa6 d5 58.Bxd5 Kd6 59.c4 Kc5 60.Ka5 
1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Malich, Burkhard"]
[Black "Langeweg, Christian"]
[WhiteElo "2450"]
[BlackElo "2425"]
[Result "1/2-1/2"]
[ECO "D38"]
[EventDate "1972.??.??"]
[PlyCount "47"]

1.c4 Nf6 2.Nf3 e6 3.d4 d5 4.Bg5 Bb4+ 5.Nc3 h6 6.Bxf6 Qxf6 7.cxd5 exd5 8.
Qb3 c5 9.e3 O-O 10.dxc5 Bxc3+ 11.Qxc3 Qxc3+ 12.bxc3 Nd7 13.Rd1 Nxc5 14.
Rxd5 b6 15.Rd4 Be6 16.c4 Rac8 17.Be2 Na4 18.Kd2 Rc5 19.Rb1 Rfc8 20.Rb4 Ra5
21.Ne1 Nc5 22.Rb2 Ra4 23.Nc2 Nb7 24.Nb4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Polugaevsky, Lev"]
[Black "Korchnoi, Viktor"]
[WhiteElo "2640"]
[BlackElo "2670"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "34"]

1.c4 c5 2.Nf3 Nf6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Nc6 6.Bg2 Nc7 7.a3 e6 8.O-O 
Be7 9.e3 Qd3 10.Qe2 Qxe2 11.Nxe2 Bd7 12.d4 Na5 13.b4 cxb4 14.axb4 Bxb4 15.
Bd2 Nc6 16.Bxb4 Nxb4 17.Rfb1 a5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Robatsch, Karl"]
[Black "Donner, Jan"]
[WhiteElo "2460"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "B50"]
[EventDate "1972.??.??"]
[PlyCount "43"]

1.e4 c5 2.Nf3 d6 3.Nc3 a6 4.Be2 Nf6 5.O-O g6 6.d4 cxd4 7.Nxd4 Bg7 8.Be3 
O-O 9.Qd2 Nc6 10.Rad1 Bd7 11.f3 Rc8 12.Nxc6 Bxc6 13.Rfe1 Re8 14.Bd4 Qc7 
15.Bf1 b5 16.a3 Qb7 17.e5 dxe5 18.Bxe5 Nh5 19.Bxg7 Nxg7 20.Qf2 Rcd8 21.Na2
Qc7 22.c4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Szabo, Laszlo"]
[Black "Ree, Hans"]
[WhiteElo "2525"]
[BlackElo "2430"]
[Result "1/2-1/2"]
[ECO "A28"]
[EventDate "1972.??.??"]
[PlyCount "49"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 O-O 6.Bd3 Bxc3 7.dxc3 d6 8.Nd2 
h6 9.e4 Nd7 10.Nf1 Nc5 11.Ne3 a5 12.O-O Ne7 13.Bd2 Be6 14.Rae1 c6 15.b3 a4
16.b4 Nxd3 17.Qxd3 d5 18.cxd5 cxd5 19.exd5 Nxd5 20.Qc2 Qc7 21.Nxd5 Bxd5 
22.Re3 Rfe8 23.Rg3 Re6 24.a3 Qc6 25.Re1 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "4"]
[White "Timman, Jan"]
[Black "Padevsky, Nikola"]
[WhiteElo "2445"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A01"]
[EventDate "1972.??.??"]
[PlyCount "53"]

1.b3 e5 2.Bb2 Nc6 3.c4 Nf6 4.e3 g6 5.Nf3 d6 6.d4 Bg7 7.dxe5 Ng4 8.Nc3 
Ngxe5 9.Nxe5 Bxe5 10.Be2 O-O 11.Qd2 Be6 12.O-O Qe7 13.f4 Bg7 14.Bf3 f5 15.
Nd5 Bxd5 16.Bxg7 Qxg7 17.cxd5 Nd8 18.Rac1 Qd7 19.Rc4 Rf7 20.Rfc1 Rc8 21.e4
fxe4 22.Rxe4 c6 23.Rce1 Rc7 24.Re8+ Rf8 25.dxc6 Nxc6 26.Bd5+ Kg7 27.Qb2+ 
1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Donner, Jan"]
[Black "Malich, Burkhard"]
[WhiteElo "2500"]
[BlackElo "2450"]
[Result "1/2-1/2"]
[ECO "D78"]
[EventDate "1972.??.??"]
[PlyCount "76"]

1.d4 Nf6 2.c4 g6 3.g3 c6 4.Bg2 d5 5.Nf3 Bg7 6.O-O O-O 7.b3 Bf5 8.Bb2 a5 9.
Nbd2 Ne4 10.Re1 Nxd2 11.Qxd2 Be4 12.Rac1 e6 13.Bf1 Bxf3 14.exf3 Na6 15.f4 
Nc7 16.a4 dxc4 17.bxc4 Qd7 18.Red1 Rfd8 19.Bg2 Qe7 20.d5 Bxb2 21.Qxb2 cxd5
22.Qxb7 Rab8 23.Qa7 Ra8 24.Qe3 Qd6 25.cxd5 Nxd5 26.Qc5 Qd7 27.Qc6 Qxc6 28.
Rxc6 Nb4 29.Rxd8+ Rxd8 30.Rc5 Rd1+ 31.Bf1 Rd5 32.Rc8+ Kg7 33.Kg2 Rd2 34.
Kf3 Ra2 35.Bb5 Ra3+ 36.Kg2 Nd5 37.h3 h5 38.h4 Ra2 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Hartoch, Robert"]
[Black "Enklaar, Bertus"]
[WhiteElo "2400"]
[Result "1-0"]
[ECO "A15"]
[EventDate "1972.??.??"]
[PlyCount "113"]

1.c4 Nf6 2.Nf3 b6 3.d3 c5 4.Nc3 g6 5.g3 Bg7 6.Bg2 Nc6 7.Ne5 Bb7 8.O-O O-O 
9.Nxc6 Bxc6 10.e4 Ne8 11.Be3 d6 12.d4 Rb8 13.Rc1 Nc7 14.Qd2 Ba8 15.Rfd1 
Ne6 16.d5 Nd4 17.Bxd4 Bxd4 18.Nb5 Bg7 19.Nxa7 Bb7 20.Nb5 Ba6 21.Na3 b5 22.
cxb5 Bxb5 23.Rc2 Bd4 24.Nxb5 Rxb5 25.Bf1 Rb7 26.b3 Qd7 27.Bc4 h5 28.Qe2 
Qh3 29.Qf1 Qg4 30.Qe2 Qh3 31.Rd3 Kg7 32.Qf1 Qg4 33.Re2 h4 34.h3 Qg5 35.Kg2
hxg3 36.Rxg3 Qf6 37.f4 Rh8 38.Qf3 Rbb8 39.a4 Rh4 40.Rg4 Rbh8 41.a5 e5 42.
dxe6 fxe6 43.a6 Rxg4+ 44.Qxg4 Rh4 45.Qg5 Rxf4 46.Qxf6+ Rxf6 47.Ra2 Rf8 48.
Bxe6 c4 49.Bxc4 Ba7 50.Ra5 Kf6 51.Rb5 Rb8 52.Rd5 Ke7 53.Kg3 Rh8 54.Kg4 Rh7
55.Bd3 Rg7 56.Bc4 Rh7 57.Rd3 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Ivkov, Borislav"]
[Black "Timman, Jan"]
[WhiteElo "2560"]
[BlackElo "2445"]
[Result "1/2-1/2"]
[ECO "B60"]
[EventDate "1972.??.??"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 7.Be2 a6 8.O-O 
e6 9.Qd2 Be7 10.Rad1 h6 11.Be3 b5 12.a3 Nxd4 13.Qxd4 e5 14.Qd3 O-O 15.f4 
Be6 16.fxe5 dxe5 17.Nd5 Bxd5 18.exd5 Bd6 19.Qf5 Qc8 20.Kh1 Qxf5 21.Rxf5 
Rac8 22.c3 Ne4 23.g4 g6 24.Rf3 Kg7 25.Rdf1 Be7 26.a4 bxa4 27.Bxa6 Rb8 28.
Bd3 Nd6 29.Rh3 Bg5 30.Bc5 Rfd8 31.Ba3 e4 32.Bxd6 Rxd6 33.Bxe4 Rxb2 34.c4 
Ra6 35.Rhf3 Bf6 36.c5 a3 37.d6 a2 38.Rxf6 a1=Q 39.Rxf7+ Kg8 40.Rf8+ Kg7 
41.Rf7+ Kg8 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Korchnoi, Viktor"]
[Black "Robatsch, Karl"]
[WhiteElo "2670"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A10"]
[EventDate "1972.??.??"]
[PlyCount "45"]

1.c4 g6 2.e4 e5 3.Nf3 d6 4.d4 Nc6 5.d5 Nce7 6.Nc3 Bg4 7.c5 Bh6 8.cxd6 cxd6
9.h3 Bxf3 10.Qxf3 Bxc1 11.Rxc1 a6 12.Bd3 Kf8 13.b4 Kg7 14.Qe3 Nf6 15.O-O 
Nd7 16.a4 Qb6 17.Qxb6 Nxb6 18.a5 Nd7 19.Nb5 axb5 20.Rc7 Nf6 21.Rxe7 b6 22.
axb6 Rhb8 23.Ra7 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Langeweg, Christian"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2425"]
[BlackElo "2510"]
[Result "1-0"]
[ECO "A46"]
[EventDate "1972.??.??"]
[PlyCount "79"]

1.Nf3 Nf6 2.g3 b5 3.Bg2 Bb7 4.d4 e6 5.c3 c5 6.O-O Qb6 7.a4 b4 8.Nbd2 cxd4 
9.a5 Qb5 10.Nxd4 Qa6 11.e4 Qd3 12.Re1 bxc3 13.bxc3 Qxc3 14.N2b3 a6 15.Bf4 
Nc6 16.Bd2 Qb2 17.Rb1 Qa3 18.Nc2 Qa4 19.e5 Nd5 20.Re4 Qa2 21.Qc1 f5 22.
exf6 Nxf6 23.Rb2 Ba3 24.Rxa2 Bxc1 25.Bxc1 Nxe4 26.Bxe4 d5 27.Bg2 O-O 28.
Nc5 Bc8 29.Bf4 Rf7 30.Bd6 h6 31.f4 g5 32.Kf2 Kg7 33.Ke3 gxf4+ 34.gxf4 Bd7 
35.Nd4 Re8 36.Nxc6 Bxc6 37.Kd4 Bb5 38.Bf3 Rf5 39.Be5+ Kh7 40.Bd1 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Padevsky, Nikola"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2460"]
[BlackElo "2640"]
[Result "1/2-1/2"]
[ECO "D40"]
[EventDate "1972.??.??"]
[PlyCount "65"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.e3 d5 5.Nc3 Nc6 6.a3 a6 7.b3 Be7 8.Bb2 cxd4 9.
exd4 b6 10.cxd5 Nxd5 11.Bd3 Bb7 12.O-O O-O 13.Qc2 Nf6 14.Rad1 Rc8 15.Qe2 
Nb8 16.Rfe1 Nd5 17.Nxd5 Bxd5 18.Nd2 Bg5 19.b4 Bxd2 20.Qxd2 b5 21.Rc1 Qh4 
22.Rxc8 Rxc8 23.Rc1 Rxc1+ 24.Qxc1 Nc6 25.Qe3 g6 26.f3 h5 27.Bc3 Qf6 28.Be4
Ne7 29.Bd2 Kf8 30.Qc3 Bc4 31.Bh6+ Kg8 32.Qd2 Nf5 33.Bxf5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Ree, Hans"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2430"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "A01"]
[EventDate "1972.??.??"]
[PlyCount "112"]

1.b3 e5 2.Bb2 d6 3.c4 Nf6 4.g3 Be7 5.Bg2 O-O 6.e4 b5 7.cxb5 a6 8.d4 Bb7 9.
Nc3 exd4 10.Qxd4 axb5 11.Nge2 c5 12.Qd2 b4 13.Nd5 Nxd5 14.exd5 Bg5 15.Qc2 
Re8 16.O-O Ba6 17.Rfe1 Ra7 18.Nf4 Bxf4 19.gxf4 Rae7 20.Rxe7 Qxe7 21.Bf3 
Nd7 22.a3 bxa3 23.Bc3 Bc8 24.Rxa3 Qh4 25.Ra4 Nf6 26.Qd3 Qh3 27.Be2 Qxd3 
28.Bxd3 Nxd5 29.Bd2 Bb7 30.Ra7 Bc6 31.Ra6 Ne7 32.b4 cxb4 33.Bxb4 Rd8 34.h3
g6 35.Bc3 Ra8 36.Rb6 Rc8 37.Bd2 Nd5 38.Ra6 Kf8 39.f5 Ke7 40.Be4 Kd7 41.
Bxd5 Bxd5 42.Bf4 Rc6 43.Rxc6 Kxc6 44.fxg6 fxg6 45.Kf1 Bf3 46.Ke1 d5 47.Kd2
d4 48.h4 Kd5 49.Kd3 Bg2 50.Bh6 Bf1+ 51.Kd2 Ke4 52.f4 Kf3 53.Bg5 Ke4 54.Bh6
Bh3 55.Bg5 Bf5 56.Bh6 Kf3 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "5"]
[White "Uhlmann, Wolfgang"]
[Black "Szabo, Laszlo"]
[WhiteElo "2570"]
[BlackElo "2525"]
[Result "1-0"]
[ECO "A30"]
[EventDate "1972.??.??"]
[PlyCount "73"]

1.c4 Nf6 2.Nc3 c5 3.Nf3 e6 4.g3 b6 5.Bg2 Bb7 6.O-O Nc6 7.e4 Rc8 8.e5 Ng8 
9.d3 d6 10.Bf4 Nge7 11.exd6 Ng6 12.Bg5 Qxd6 13.h4 h6 14.Be3 Be7 15.h5 Nge5
16.Nxe5 Qxe5 17.Bf4 Qd4 18.Nb5 Qd7 19.Qg4 Kf8 20.Rad1 a6 21.d4 Nxd4 22.Be5
Bf6 23.Nxd4 Bxg2 24.Nb5 Qc6 25.Bxf6 gxf6 26.Na7 f5 27.Qh4 Qf3 28.Nxc8 Bxf1
29.Rxf1 Kg7 30.Nd6 Rg8 31.Qh1 Qd3 32.Qc6 Kh7 33.Nxf7 Qd4 34.Kg2 Qf6 35.Nd6
f4 36.Qf3 Qxb2 37.Qxf4 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Browne, Walter Shawn"]
[Black "Uhlmann, Wolfgang"]
[WhiteElo "2500"]
[BlackElo "2570"]
[Result "0-1"]
[ECO "A08"]
[EventDate "1972.??.??"]
[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.e5 Nd7 
9.Re1 b5 10.Nf1 a5 11.h4 b4 12.Bf4 Ba6 13.Ng5 Qe8 14.Qh5 Bxg5 15.Qxg5 a4 
16.Ne3 Kh8 17.Rad1 h6 18.Qh5 f5 19.Qxe8 Raxe8 20.Nc4 Nd4 21.Nd6 Nxc2 22.
Nxe8 Rxe8 23.Re2 b3 24.axb3 axb3 25.Red2 Bb5 26.Rc1 Ra8 27.Bf3 Ra2 28.Bd1 
Ba4 29.Rb1 Kg8 30.g4 fxg4 31.Bxg4 Kf7 32.Kg2 Bb5 33.Bg3 Nb6 34.Bd1 Bxd3 
35.Rxd3 Ne1+ 36.Kf1 Nxd3 37.Bxb3 Rxb2 38.Rxb2 Nxb2 39.Ke2 c4 40.Bc2 d4 41.
Be4 d3+ 42.Kd2 N6a4 43.Ke3 Nc5 44.Bf3 Nb3 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Donner, Jan"]
[Black "Korchnoi, Viktor"]
[WhiteElo "2500"]
[BlackElo "2670"]
[Result "1/2-1/2"]
[ECO "E58"]
[EventDate "1972.??.??"]
[PlyCount "62"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d5 7.O-O Nc6 8.a3 Bxc3 
9.bxc3 Qc7 10.cxd5 exd5 11.Nh4 Re8 12.f3 Bd7 13.Ra2 Qa5 14.Bd2 Qb6 15.Qb1 
Na5 16.Rb2 Qd6 17.Bc1 Rac8 18.Nf5 Bxf5 19.Bxf5 Rc7 20.Bd3 b6 21.Re2 Nc4 
22.Qa2 b5 23.Rfe1 a5 24.e4 dxe4 25.Bxc4 bxc4 26.fxe4 Qa6 27.d5 Rb7 28.Qd2 
Rd7 29.Qg5 Qb7 30.d6 h6 31.Qxc5 Rxe4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Enklaar, Bertus"]
[Black "Langeweg, Christian"]
[BlackElo "2425"]
[Result "1-0"]
[ECO "B48"]
[EventDate "1972.??.??"]
[PlyCount "75"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.f4 a6 7.Be3 Bb4 8.Qg4 
Kf8 9.Bd3 Nf6 10.Qf3 b5 11.Ne2 Bb7 12.O-O-O d5 13.exd5 Ne7 14.Bd4 Nexd5 
15.Qf2 Rc8 16.Nxd5 Bxd5 17.Kb1 Bc5 18.Rhe1 b4 19.h3 h5 20.g3 Kg8 21.Qe3 a5
22.f5 exf5 23.Bxf5 Re8 24.Qf2 Bxd4 25.Nxd4 Be4 26.Nb5 Qc6 27.Nd6 Bxf5 28.
Nxe8 Be6 29.Nxf6+ gxf6 30.Rd8+ Kg7 31.Rxh8 Kxh8 32.Qxf6+ Kh7 33.Qg5 Qf3 
34.g4 hxg4 35.hxg4 a4 36.Qh4+ Kg7 37.Rh1 Kf8 38.Qh8+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Malich, Burkhard"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2450"]
[BlackElo "2510"]
[Result "0-1"]
[ECO "A42"]
[EventDate "1972.??.??"]
[PlyCount "84"]

1.Nf3 g6 2.c4 Bg7 3.Nc3 d6 4.d4 Nd7 5.e4 e5 6.Be2 Nh6 7.O-O O-O 8.Rb1 c6 
9.b3 f5 10.dxe5 dxe5 11.Ba3 Re8 12.c5 Nf8 13.Nd2 b5 14.cxb6 axb6 15.Bb2 
Ne6 16.a4 Nf7 17.Nc4 Nd4 18.b4 Be6 19.Re1 Ra7 20.b5 Rd7 21.bxc6 Nxc6 22.
Nd5 fxe4 23.Ncxb6 Rxd5 24.Nxd5 Bxd5 25.Bb5 Re6 26.Rc1 Nd4 27.Bc4 Bh6 28.
Bxd5 Qxd5 29.Rc8+ Kg7 30.Ba3 Bd2 31.Bf8+ Kf6 32.Rf1 Qd7 33.Rb8 Rc6 34.Qb1 
Rc2 35.Rb6+ Kg5 36.Rb7 Qf5 37.Be7+ Kh5 38.h3 Nh6 39.Rb3 Bf4 40.Kh1 g5 41.
Ra3 e3 42.fxe3 Qxh3+ 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Polugaevsky, Lev"]
[Black "Ivkov, Borislav"]
[WhiteElo "2640"]
[BlackElo "2560"]
[Result "1-0"]
[ECO "E05"]
[EventDate "1972.??.??"]
[PlyCount "75"]

1.Nf3 d5 2.c4 e6 3.g3 Nf6 4.Bg2 Be7 5.O-O O-O 6.d4 dxc4 7.Qc2 a6 8.a4 c5 
9.dxc5 Bxc5 10.Nbd2 Nc6 11.Nxc4 Qe7 12.Nfe5 Nd4 13.Qd1 Rd8 14.e3 Nf5 15.
Qb3 Qc7 16.Nd3 Rb8 17.Bd2 b6 18.Nxc5 bxc5 19.Qa3 Qa7 20.Ba5 Re8 21.Qd3 Bb7
22.e4 Qa8 23.Rfe1 Nd4 24.Bc7 Bc6 25.Bxb8 Rxb8 26.Rac1 Bxa4 27.e5 Nd5 28.
Nd6 Qa7 29.Qc4 Qd7 30.Qxc5 Nb3 31.Qc8+ Qd8 32.Qxb8 Qxb8 33.Rc8+ Qxc8 34.
Nxc8 Kf8 35.Rd1 Bc6 36.Nb6 Nxb6 37.Bxc6 Na5 38.Rd8+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Robatsch, Karl"]
[Black "Padevsky, Nikola"]
[WhiteElo "2460"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "C98"]
[EventDate "1972.??.??"]
[PlyCount "149"]

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 Nc6 13.d5 Nd8 14.Nf1 Ne8 15.g4 g6 16.
Ng3 Ng7 17.Kh2 f6 18.Be3 Bd7 19.Qd2 Nf7 20.Rg1 Kh8 21.Raf1 Rg8 22.Ne1 Raf8
23.f4 exf4 24.Bxf4 Ne8 25.Nf3 Qc8 26.Be3 Ne5 27.Nxe5 fxe5 28.Bh6 Ng7 29.
Kg2 Rxf1 30.Rxf1 Rf8 31.Rxf8+ Qxf8 32.Nf1 Qf6 33.Qf2 Kg8 34.Qxf6 Bxf6 35.
Nd2 Ne8 36.b4 c4 37.Be3 Bd8 38.a4 Kf7 39.a5 Nf6 40.Bd1 h5 41.g5 Nh7 42.h4 
Nf8 43.Be2 Bc8 44.Bxc4 bxc4 45.Nxc4 Bc7 46.Bb6 Bb8 47.Nd2 Nd7 48.c4 Ke7 
49.Nb3 Bb7 50.c5 dxc5 51.bxc5 Bc8 52.Kf2 Nxc5 53.Bxc5+ Bd6 54.Bxd6+ Kxd6 
55.Nd2 Kc5 56.Nf3 Kd6 57.Ke3 Bh3 58.Nd2 Kc5 59.Nb3+ Kd6 60.Nc1 Bg2 61.Nd3 
Bh3 62.Nb2 Bf1 63.Na4 Bh3 64.Nb6 Kc5 65.Kf2 Bg4 66.Kg3 Kb5 67.d6 Kxa5 68.
d7 Bxd7 69.Nxd7 Kb5 70.Nxe5 a5 71.Nd3 a4 72.Kf3 a3 73.Nc1 Kc4 74.e5 Kd5 
75.Kf4 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Szabo, Laszlo"]
[Black "Hartoch, Robert"]
[WhiteElo "2525"]
[BlackElo "2400"]
[Result "1-0"]
[ECO "A32"]
[EventDate "1972.??.??"]
[PlyCount "69"]

1.d4 Nf6 2.c4 c5 3.Nf3 cxd4 4.Nxd4 e6 5.Nc3 Bb4 6.Nc2 Be7 7.e4 Nc6 8.Bf4 
O-O 9.Be2 d6 10.O-O b6 11.Qd2 Bb7 12.Rfd1 Ne5 13.f3 Qb8 14.Bg3 Rd8 15.f4 
Ned7 16.Bf3 a6 17.Nd4 Qc7 18.Rac1 Rac8 19.f5 e5 20.Nd5 Nxd5 21.cxd5 Nc5 
22.Ne2 Qb8 23.Bf2 Nd7 24.Nc3 Re8 25.g4 Bd8 26.g5 b5 27.Kh1 Bb6 28.Bxb6 
Nxb6 29.f6 g6 30.Qf2 Rxc3 31.Rxc3 Na4 32.Qh4 Kh8 33.Qh6 Rg8 34.Bg4 Nxc3 
35.Rd3 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "6"]
[White "Timman, Jan"]
[Black "Ree, Hans"]
[WhiteElo "2445"]
[BlackElo "2430"]
[Result "1/2-1/2"]
[ECO "B36"]
[EventDate "1972.??.??"]
[PlyCount "84"]

1.c4 g6 2.e4 c5 3.Nf3 Nc6 4.d4 cxd4 5.Nxd4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6 8.Be3 
Bg7 9.f3 O-O 10.Qd2 Qa5 11.Rc1 Be6 12.Nd5 Qxa2 13.Nxe7+ Kh8 14.Be2 Ng8 15.
Nxg8 Kxg8 16.Bd4 Bxd4 17.Qxd4 Qa5+ 18.Kf2 Qe5 19.Rcd1 Rfc8 20.g3 Rc6 21.f4
Qxd4+ 22.Rxd4 Rb6 23.g4 f6 24.b3 Rxb3 25.Rxd6 Re8 26.Rhd1 Rb2 27.R1d2 Rxd2
28.Rxd2 Kf8 29.Ra2 Ra8 30.Rb2 b6 31.Ke3 Rc8 32.Kd4 Ke7 33.h4 h6 34.Rb5 
Rd8+ 35.Kc3 Bd7 36.Rb1 Bc6 37.Bd3 g5 38.hxg5 hxg5 39.fxg5 fxg5 40.Rh1 Bd7 
41.Be2 Kf6 42.Rd1 Ke7 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Hartoch, Robert"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2400"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "A73"]
[EventDate "1972.??.??"]
[PlyCount "74"]

1.d4 c5 2.d5 Nf6 3.c4 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 
9.O-O Bg4 10.Bf4 a6 11.h3 Bxf3 12.Bxf3 Ne8 13.Qd2 Nd7 14.Be2 b5 15.a4 b4 
16.Nd1 Qe7 17.f3 Nef6 18.g4 Ne5 19.Ne3 Rfe8 20.Rae1 Nfd7 21.Bg3 Nf6 22.Bf4
a5 23.Qc2 Nfd7 24.b3 Nb6 25.Bb5 Rec8 26.Qe2 Ra7 27.Rc1 Rac7 28.Bg3 Ned7 
29.Kg2 Bd4 30.Bxd7 Qxd7 31.Nc4 Nxc4 32.Qxc4 Ra7 33.Rce1 Re8 34.f4 f6 35.g5
f5 36.e5 Raa8 37.e6 Qb7 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Ivkov, Borislav"]
[Black "Robatsch, Karl"]
[WhiteElo "2560"]
[BlackElo "2460"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "113"]

1.Nf3 Nf6 2.c4 c5 3.Nc3 d5 4.cxd5 Nxd5 5.e3 Nxc3 6.bxc3 g6 7.Be2 Bg7 8.O-O
O-O 9.d4 Nd7 10.Bb2 cxd4 11.cxd4 Nb6 12.a4 Be6 13.a5 Nc4 14.Bc3 Rc8 15.Bb4
Nd6 16.Rb1 Qc7 17.Bd3 b6 18.axb6 axb6 19.Qe2 Ra8 20.Rfc1 Qb7 21.Nd2 Rfc8 
22.Rxc8+ Nxc8 23.Be4 Bd5 24.Bxd5 Qxd5 25.Qf3 Qxf3 26.gxf3 Kf8 27.Rc1 Ke8 
28.Ne4 Kd7 29.Nc3 Ra7 30.Nb5 Rb7 31.f4 Na7 32.Nxa7 Rxa7 33.Kg2 e6 34.Kf3 
Bf6 35.Rb1 Bd8 36.Rb2 f5 37.Ke2 Ra1 38.Kd3 Rd1+ 39.Rd2 Rh1 40.f3 Rf1 41.
Ra2 Rxf3 42.Be1 Rh3 43.Bg3 Bc7 44.Ra8 b5 45.Ra6 g5 46.d5 exd5 47.Kd4 gxf4 
48.Bxf4 Bxf4 49.exf4 Rxh2 50.Kxd5 Kc7 51.Kc5 h5 52.Ra7+ Kb8 53.Rh7 h4 54.
Kxb5 h3 55.Kb6 Kc8 56.Kc6 Kd8 57.Kd6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Korchnoi, Viktor"]
[Black "Malich, Burkhard"]
[WhiteElo "2670"]
[BlackElo "2450"]
[Result "1/2-1/2"]
[ECO "C34"]
[EventDate "1972.??.??"]
[PlyCount "76"]

1.e4 e5 2.f4 exf4 3.Nf3 h6 4.Bc4 d6 5.d4 g5 6.g3 Bg7 7.O-O Bh3 8.Rf2 Nc6 
9.Bb5 Ne7 10.gxf4 gxf4 11.Bxf4 a6 12.Bxc6+ Nxc6 13.Nc3 Qd7 14.Be3 O-O-O 
15.Nh4 Rhg8 16.Kh1 Ne7 17.Rxf7 Rdf8 18.Rxf8+ Rxf8 19.Qd2 Qg4 20.Ng2 Qf3 
21.Rg1 Nc6 22.Nd1 Qxe4 23.Nf2 Qf3 24.Nxh3 Qxh3 25.Ne1 Rf1 26.c3 Ne7 27.Qg2
Rxg1+ 28.Bxg1 Qxg2+ 29.Kxg2 Kd7 30.Kf3 Ke6 31.Ng2 b5 32.Kg4 Nd5 33.Ne3 
Nf6+ 34.Kf4 c5 35.dxc5 dxc5 36.Bf2 Bf8 37.Nf5 Nd5+ 38.Ke4 Nf6+ 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Langeweg, Christian"]
[Black "Szabo, Laszlo"]
[WhiteElo "2425"]
[BlackElo "2525"]
[Result "1-0"]
[ECO "A46"]
[EventDate "1972.??.??"]
[PlyCount "81"]

1.Nf3 Nf6 2.g3 d6 3.d4 Bg4 4.Bg2 Qc8 5.h3 Bd7 6.c4 Nc6 7.Nc3 e5 8.d5 Ne7 
9.c5 Ng6 10.h4 e4 11.Ng5 dxc5 12.Ncxe4 Nxe4 13.Nxe4 f5 14.Ng5 h6 15.Ne6 
Bxe6 16.dxe6 c6 17.Qb3 Bd6 18.e4 fxe4 19.Bxe4 Ne5 20.f4 c4 21.Qd1 Qxe6 22.
fxe5 Qxe5 23.Qe2 Qxg3+ 24.Kd1 O-O-O 25.Kc2 Rhe8 26.Bd2 Bf4 27.Ba5 b6 28.
Rag1 Qe3 29.Qg4+ Kb8 30.Re1 Qg3 31.Rhg1 Qxg4 32.Rxg4 g5 33.hxg5 hxg5 34.
Bxc6 Rxe1 35.Bxe1 Kc7 36.Bb5 Rd4 37.Rg2 Kd6 38.Bb4+ Kd5 39.Re2 g4 40.Bc3 
Rd3 41.Bxc4+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Ljubojevic, Ljubomir"]
[Black "Enklaar, Bertus"]
[WhiteElo "2510"]
[Result "1-0"]
[ECO "C11"]
[EventDate "1972.??.??"]
[PlyCount "75"]

1.e4 e6 2.Nf3 d5 3.Nc3 Nf6 4.e5 Nfd7 5.d4 c5 6.dxc5 Nc6 7.Bf4 Bxc5 8.Bd3 
f6 9.exf6 Nxf6 10.O-O O-O 11.Ne2 Qb6 12.Rb1 e5 13.Nxe5 Nxe5 14.Bxe5 Ng4 
15.Bd4 Nxf2 16.Rxf2 Rxf2 17.Bxh7+ Kxh7 18.Kxf2 Bf5 19.Bxc5 Qxc5+ 20.Nd4 
Rf8 21.Kg1 Be4 22.Qd2 Rf6 23.Re1 Rg6 24.g3 Qc8 25.Rf1 Kg8 26.Rf4 Qh3 27.
Nf5 Re6 28.c4 Re5 29.Ne3 Qe6 30.Qd4 b6 31.b3 Rg5 32.g4 Re5 33.h3 Qd6 34.
cxd5 Bxd5 35.Rf5 Rxe3 36.Qxe3 Bc6 37.b4 Qd1+ 38.Rf1 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Padevsky, Nikola"]
[Black "Donner, Jan"]
[WhiteElo "2460"]
[BlackElo "2500"]
[Result "0-1"]
[ECO "B09"]
[EventDate "1972.??.??"]
[PlyCount "70"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5 Nfd7 7.Bc4 Nb6 8.Bb3 Nc6
9.Ne2 Na5 10.c3 Nxb3 11.axb3 f6 12.exf6 exf6 13.O-O Be6 14.Ng3 Qd7 15.Nh4 
f5 16.c4 a5 17.d5 Bf7 18.Qc2 a4 19.bxa4 Nxa4 20.Ra3 b5 21.b3 Nb6 22.Rxa8 
Rxa8 23.Be3 bxc4 24.bxc4 Ra3 25.Bxb6 cxb6 26.Nf3 Qc7 27.Qe2 b5 28.cxb5 
Qc5+ 29.Kh1 Re3 30.Qd2 Bc3 31.Qa2 Bxd5 32.Qa6 Bf6 33.b6 Rb3 34.Qa4 Qc6 35.
Qa5 Rxf3 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Ree, Hans"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2430"]
[BlackElo "2640"]
[Result "0-1"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "64"]

1.c4 Nf6 2.Nf3 c5 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Nc6 6.Bg2 Nc7 7.d3 e5 8.Nd2 
Bd7 9.O-O Be7 10.Nc4 f6 11.f4 b5 12.Bxc6 Bxc6 13.Na5 Bd7 14.fxe5 Ne6 15.
Nb7 Qb6 16.Nd6+ Bxd6 17.exd6 Qxd6 18.Ne4 Qe7 19.a4 bxa4 20.b3 O-O 21.bxa4 
f5 22.Nc3 Bc6 23.e3 Rad8 24.Qe2 Qd7 25.Bb2 Qxd3 26.Rfd1 Qxe2 27.Nxe2 Ng5 
28.Nf4 Rfe8 29.h3 Kf7 30.Nd3 Rd5 31.h4 Nf3+ 32.Kf2 Red8 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "7"]
[White "Uhlmann, Wolfgang"]
[Black "Timman, Jan"]
[WhiteElo "2570"]
[BlackElo "2445"]
[Result "1/2-1/2"]
[ECO "A17"]
[EventDate "1972.??.??"]
[PlyCount "84"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.Qc2 O-O 5.a3 Bxc3 6.Qxc3 b6 7.g3 Bb7 8.Bg2 
d6 9.O-O Nbd7 10.b3 e5 11.Bb2 c5 12.e3 Rc8 13.Rfe1 Rc7 14.d3 Qa8 15.e4 Nh5
16.Nh4 f5 17.exf5 Bxg2 18.Nxg2 Rxf5 19.Qc2 Rf3 20.Re3 Nf8 21.Qe2 Rcf7 22.
Rxf3 Qxf3 23.Qxf3 Rxf3 24.Ne3 Ne6 25.b4 g6 26.b5 Nd4 27.a4 Rf7 28.Bxd4 
cxd4 29.Nd5 Nf6 30.Nxf6+ Rxf6 31.a5 Rf3 32.axb6 axb6 33.Ra3 e4 34.Ra8+ Kf7
35.dxe4 d3 36.Kg2 d2 37.Ra1 Rd3 38.Rd1 Ke6 39.f4 Rd4 40.Kf3 Rxc4 41.Rxd2 
Rb4 42.Rd5 Rb3+ 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Browne, Walter Shawn"]
[Black "Langeweg, Christian"]
[WhiteElo "2500"]
[BlackElo "2425"]
[Result "1-0"]
[ECO "B80"]
[EventDate "1972.??.??"]
[PlyCount "143"]

1.e4 c5 2.Nf3 e6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 Qc7 6.g3 a6 7.Bg2 Nf6 8.O-O 
Be7 9.Re1 d6 10.Nxc6 bxc6 11.e5 dxe5 12.Rxe5 Bb7 13.Bf4 Bd6 14.Rxe6+ fxe6 
15.Bxd6 Qd7 16.Bc5 Qxd1+ 17.Rxd1 Rd8 18.Re1 Kf7 19.Ne4 Nxe4 20.Bxe4 Rhe8 
21.Re3 Rd7 22.Rf3+ Kg8 23.Rb3 Red8 24.Rb6 Rc7 25.Bd3 Rd5 26.b4 Rxd3 27.
cxd3 Kf7 28.f4 Rd7 29.Kf2 Ke8 30.Ke3 Kd8 31.Bd6 Kc8 32.Be5 g6 33.d4 Re7 
34.g4 Rd7 35.a4 Kd8 36.Kf2 Ke7 37.Kg3 Kf7 38.Kh4 h6 39.h3 Re7 40.Kg3 Rd7 
41.Kf2 Re7 42.Ke3 Rd7 43.Kd3 Ke7 44.Kc3 h5 45.Kc4 hxg4 46.hxg4 Kd8 47.Kd3 
Rh7 48.b5 cxb5 49.axb5 axb5 50.Rxe6 Rh3+ 51.Kd2 b4 52.Rxg6 Be4 53.Rb6 b3 
54.f5 Ke8 55.Kc1 Rh1+ 56.Kb2 Rb1+ 57.Kc3 Rc1+ 58.Kd2 Rc2+ 59.Ke3 Bd5 60.
Kd3 Bc4+ 61.Ke3 Bd5 62.Kd3 Bc4+ 63.Ke4 Rg2 64.d5 Rxg4+ 65.Kf3 Rh4 66.d6 
Bd5+ 67.Kg3 Re4 68.Bf4 Re2 69.d7+ Kd8 70.Rd6 Rg2+ 71.Kh3 b2 72.Be5 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Donner, Jan"]
[Black "Ivkov, Borislav"]
[WhiteElo "2500"]
[BlackElo "2560"]
[Result "1-0"]
[ECO "E74"]
[EventDate "1972.??.??"]
[PlyCount "89"]

1.d4 g6 2.c4 Nf6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6 7.Be3 c5 8.d5 b5 9.
cxb5 a6 10.bxa6 Bxa6 11.Nf3 Nbd7 12.Bxa6 Rxa6 13.Nd2 Ne5 14.O-O Qa5 15.Qe2
Rb8 16.f4 Neg4 17.Nc4 Qb4 18.Bd2 Nd7 19.e5 dxe5 20.h3 Ngf6 21.fxe5 Nh5 22.
Ne4 Qb5 23.a4 Rxa4 24.Rxa4 Qxa4 25.g4 Nxe5 26.Nxe5 Qd4+ 27.Rf2 Qxe5 28.
gxh5 Rxb2 29.Qf3 f5 30.Ng3 c4 31.Bf4 Rxf2 32.Kxf2 Qb2+ 33.Ne2 g5 34.Bc1 
Qe5 35.Bd2 e6 36.dxe6 Qxe6 37.Bc3 g4 38.hxg4 fxg4 39.Qf4 Bf8 40.Nd4 Bc5 
41.Kg3 Qd7 42.Qxg4+ Qxg4+ 43.Kxg4 Kf7 44.Kf5 Bb6 45.Nf3 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Korchnoi, Viktor"]
[Black "Padevsky, Nikola"]
[WhiteElo "2670"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A17"]
[EventDate "1972.??.??"]
[PlyCount "79"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g3 O-O 5.Bg2 Re8 6.O-O e5 7.d3 Bxc3 8.bxc3 
d6 9.Nd2 Nbd7 10.Re1 Nc5 11.d4 Ne6 12.Nf1 e4 13.Qc2 h6 14.Bxe4 Nxd4 15.
cxd4 Nxe4 16.f3 Ng5 17.Qc3 Qf6 18.Bb2 c5 19.d5 Qxc3 20.Bxc3 f5 21.Kf2 b6 
22.a4 Bd7 23.h4 Nf7 24.h5 Ne5 25.Ne3 Re7 26.a5 Rb8 27.axb6 axb6 28.Ra7 Kf8
29.Rb1 g5 30.hxg6 Nxg6 31.Rh1 f4 32.gxf4 Nxf4 33.Bf6 Rh7 34.Bg5 Ng6 35.Ng4
Rf7 36.Nxh6 Rh7 37.Rha1 Ne5 38.Ra8 Rxa8 39.Rxa8+ Kg7 40.Rg8# 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Malich, Burkhard"]
[Black "Enklaar, Bertus"]
[WhiteElo "2450"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "81"]

1.c4 Nf6 2.Nc3 c5 3.g3 g6 4.Bg2 Bg7 5.a3 Nc6 6.Rb1 a5 7.Nf3 O-O 8.O-O d5 
9.cxd5 Nxd5 10.Nxd5 Qxd5 11.d3 Qh5 12.Be3 Be6 13.Ng5 Bg4 14.f3 Bd7 15.Ne4 
Nd4 16.Bg5 f5 17.Nxc5 Bc6 18.Bd2 b6 19.e3 bxc5 20.exd4 Bxd4+ 21.Kh1 Bd5 
22.Qe2 e5 23.g4 Qh4 24.gxf5 Rxf5 25.f4 Qd8 26.Be4 a4 27.Qg2 exf4 28.Rxf4 
Bxe4 29.Qxe4 Re5 30.Qc6 Qd5+ 31.Qxd5+ Rxd5 32.b4 axb3 33.Rxb3 Re5 34.Bc3 
Bxc3 35.Rxc3 Re2 36.Kg1 Rb8 37.Rf2 Rxf2 38.Kxf2 Rb2+ 39.Kg3 Ra2 40.Rxc5 
Rxa3 41.Rd5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Polugaevsky, Lev"]
[Black "Uhlmann, Wolfgang"]
[WhiteElo "2640"]
[BlackElo "2570"]
[Result "1-0"]
[ECO "E69"]
[EventDate "1972.??.??"]
[PlyCount "61"]

1.c4 Nf6 2.Nc3 e5 3.g3 g6 4.Nf3 d6 5.d4 Nbd7 6.Bg2 Bg7 7.O-O O-O 8.e4 c6 
9.h3 Qa5 10.Re1 exd4 11.Nxd4 Re8 12.Be3 Nb6 13.c5 Nc4 14.Nb3 Qd8 15.cxd6 
Nxd6 16.Bd4 Nc4 17.Qc2 Be6 18.Rad1 Qe7 19.f4 Nb6 20.Nc5 Rad8 21.Nxe6 Qxe6 
22.Qf2 Nh5 23.e5 Bf8 24.g4 Ng7 25.Ne4 Be7 26.Nf6+ Bxf6 27.exf6 Rxd4 28.
Qxd4 Qxe1+ 29.Rxe1 Rxe1+ 30.Kf2 Ne6 31.Qd2 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Robatsch, Karl"]
[Black "Ree, Hans"]
[WhiteElo "2460"]
[BlackElo "2430"]
[Result "0-1"]
[ECO "B70"]
[EventDate "1972.??.??"]
[PlyCount "54"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g3 g6 7.Bg2 Nxd4 8.Qxd4 
Bg7 9.Nd5 O-O 10.Qd1 Nxd5 11.exd5 Bf5 12.O-O Qc7 13.c3 b5 14.a4 a6 15.Qe2 
Bd7 16.Qxe7 Rfe8 17.Qh4 bxa4 18.Rxa4 Bxa4 19.Qxa4 Qb8 20.Bh3 Qb5 21.Bd7 
Qxa4 22.Bxa4 Re4 23.Bc6 Rb8 24.f3 Re2 25.Rf2 Re1+ 26.Rf1 Rxf1+ 27.Kxf1 
Bxc3 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Szabo, Laszlo"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2525"]
[BlackElo "2510"]
[Result "1/2-1/2"]
[ECO "A65"]
[EventDate "1972.??.??"]
[PlyCount "45"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nge2 Bg7 8.Ng3 Na6
9.Be2 O-O 10.O-O Nc7 11.Bf4 Rb8 12.Qd2 b5 13.Bh6 Re8 14.Bxg7 Kxg7 15.f3 
Qe7 16.Nd1 h5 17.Qf4 h4 18.Qxh4 Qe5 19.f4 Qd4+ 20.Nf2 Qxb2 21.Rab1 Qd4 22.
Rbd1 Qb2 23.Rb1 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "8"]
[White "Timman, Jan"]
[Black "Hartoch, Robert"]
[WhiteElo "2445"]
[BlackElo "2400"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1972.??.??"]
[PlyCount "99"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nge2 Nf6 5.g3 O-O 6.Bg2 e5 7.O-O Nc6 8.dxe5 
dxe5 9.Qxd8 Nxd8 10.f4 exf4 11.gxf4 Ne6 12.f5 Nc5 13.e5 Ng4 14.h3 Nxe5 15.
f6 Bxf6 16.Rxf6 Bf5 17.Nd4 Ncd7 18.Rxf5 gxf5 19.Bh6 Rfe8 20.Nd5 Rac8 21.
Nxf5 Ng6 22.Bg5 Kf8 23.Bh6+ Kg8 24.h4 c6 25.h5 cxd5 26.hxg6 Rxc2 27.Nd6 
Re6 28.gxf7+ Kh8 29.Bf4 Kg7 30.Bh3 Rg6+ 31.Kf1 Rf6 32.Ne8+ Kxf7 33.Nxf6 
Nxf6 34.Be5 Ne4 35.Kg1 Nd2 36.Bg2 Ke6 37.Re1 Ne4 38.Bxe4 dxe4 39.Rxe4 Kd5 
40.Re3 b5 41.Bf6 b4 42.Re5+ Kc6 43.Rh5 Rc1+ 44.Kg2 a6 45.Ra5 Kb6 46.Bd8+ 
Kb7 47.b3 Rc8 48.Be7 Re8 49.Bxb4 Re4 50.Bc3 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Enklaar, Bertus"]
[Black "Szabo, Laszlo"]
[BlackElo "2525"]
[Result "0-1"]
[ECO "A79"]
[EventDate "1972.??.??"]
[PlyCount "57"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 Bg7 5.e4 d6 6.Nf3 O-O 7.Be2 e6 8.O-O exd5 
9.cxd5 Re8 10.Nd2 Na6 11.Kh1 Nc7 12.a4 b6 13.f3 Rb8 14.Nc4 Ba6 15.Bg5 Qd7 
16.Qd2 Bxc4 17.Bxc4 a6 18.Bd3 b5 19.axb5 axb5 20.b4 c4 21.Bc2 Ra8 22.Be3 
Rxa1 23.Rxa1 Nfxd5 24.exd5 Bxc3 25.Qxc3 Nxd5 26.Qd4 Nxe3 27.Be4 d5 28.Qxe3
dxe4 29.fxe4 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Hartoch, Robert"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2400"]
[BlackElo "2640"]
[Result "0-1"]
[ECO "B20"]
[EventDate "1972.??.??"]
[PlyCount "66"]

1.g3 c5 2.Bg2 g6 3.e4 Bg7 4.Ne2 Nc6 5.O-O d6 6.d3 e5 7.c4 Nge7 8.Nbc3 Rb8 
9.f4 O-O 10.Be3 exf4 11.gxf4 f5 12.Qd2 Nd4 13.Rae1 Nec6 14.Nd5 b5 15.cxb5 
Rxb5 16.Nec3 Rb8 17.Kh1 Ba6 18.Bxd4 Nxd4 19.Ne3 Kh8 20.exf5 Nxf5 21.Nxf5 
Rxf5 22.Be4 Rf8 23.Qg2 Qh4 24.Re3 Rxf4 25.Rg1 Rf2 26.Qh3 Qxh3 27.Rxh3 Bc8 
28.Nd1 Rf4 29.Rhg3 Bxb2 30.Ne3 Bd4 31.Nd5 Bxg1 32.Nxf4 Bd4 33.Rf3 Rb1+ 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Ivkov, Borislav"]
[Black "Korchnoi, Viktor"]
[WhiteElo "2560"]
[BlackElo "2670"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "120"]

1.Nf3 c5 2.c4 Nf6 3.Nc3 d5 4.cxd5 Nxd5 5.e3 Nxc3 6.bxc3 g6 7.Be2 Bg7 8.O-O
O-O 9.d4 Qc7 10.Ba3 Nd7 11.Rc1 Rb8 12.Qa4 b6 13.Rfd1 Bb7 14.d5 Nf6 15.c4 
Ne4 16.Qb3 e5 17.Bb2 Rfe8 18.Nd2 Nd6 19.a4 Bc8 20.Qa3 f5 21.Rb1 e4 22.a5 
Rf8 23.axb6 axb6 24.Bxg7 Qxg7 25.Rb3 Bd7 26.Rdb1 Ra8 27.Qc1 Nc8 28.Ra3 
Rxa3 29.Qxa3 Qe5 30.Bd1 Rf6 31.Ba4 Bxa4 32.Qxa4 Qc7 33.Qe8+ Kg7 34.Ra1 Rf8
35.Qb5 Nd6 36.Qb2+ Kg8 37.Ra6 Nc8 38.Ra8 Qb7 39.Qa1 Re8 40.Qa6 Qxa6 41.
Rxa6 Kf7 42.Kf1 Ke7 43.Ke2 Kd7 44.Nb1 Kc7 45.Na3 Kb7 46.Nb5 Rd8 47.Ra2 Nd6
48.Nxd6+ Rxd6 49.f3 g5 50.fxe4 fxe4 51.Ra1 b5 52.Ra5 bxc4 53.Rxc5 c3 54.
Kf2 h5 55.Kg3 Rd7 56.Rxc3 Rxd5 57.Rc4 Re5 58.h3 Kb6 59.Rc8 Kb5 60.h4 Kb4 
1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Langeweg, Christian"]
[Black "Timman, Jan"]
[WhiteElo "2425"]
[BlackElo "2445"]
[Result "1/2-1/2"]
[ECO "B06"]
[EventDate "1972.??.??"]
[PlyCount "54"]

1.Nf3 g6 2.e4 Bg7 3.d4 d6 4.Bc4 c6 5.Bb3 Nf6 6.Nbd2 O-O 7.O-O Bg4 8.Re1 c5
9.dxc5 dxc5 10.e5 Nfd7 11.e6 Ne5 12.exf7+ Kh8 13.h3 Bxf3 14.Nxf3 Qxd1 15.
Rxd1 Nxf3+ 16.gxf3 Nc6 17.Bd5 Nd4 18.Bg5 e6 19.Rxd4 Bxd4 20.Bxe6 Kg7 21.
Re1 Bxb2 22.Be7 Rxf7 23.Bxf7 Kxf7 24.Bxc5 Bf6 25.Re4 b5 26.a4 Rc8 27.Be3 
a6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Ljubojevic, Ljubomir"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2510"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "B95"]
[EventDate "1972.??.??"]
[PlyCount "81"]

1.e4 c5 2.Nf3 d6 3.Nc3 a6 4.d4 cxd4 5.Nxd4 Nf6 6.Bg5 e6 7.Qf3 h6 8.Be3 
Nbd7 9.Be2 Qc7 10.Qg3 b5 11.f4 b4 12.Na4 Nc5 13.e5 dxe5 14.Nxc5 exd4 15.
Bxd4 Bxc5 16.Bxc5 Qxc5 17.Qxg7 Ke7 18.Qxh8 Bb7 19.Qxh6 Bxg2 20.Qg5 Qxg5 
21.fxg5 Bxh1 22.gxf6+ Kxf6 23.Kd2 Be4 24.Bd3 Bxd3 25.cxd3 Rh8 26.Rf1+ Ke7 
27.Rf2 Rh3 28.Kc2 a5 29.Rd2 Kd6 30.Kb3 Kc5 31.Ka4 Kb6 32.d4 Rh4 33.b3 Rh3 
34.d5 exd5 35.Rxd5 Rxh2 36.Rb5+ Kc6 37.Rxa5 Rxa2+ 38.Kxb4 Rxa5 39.Kxa5 f5 
40.Kb4 f4 41.Kc4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Padevsky, Nikola"]
[Black "Malich, Burkhard"]
[WhiteElo "2460"]
[BlackElo "2450"]
[Result "0-1"]
[ECO "B81"]
[EventDate "1972.??.??"]
[PlyCount "108"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 a6 7.g5 Nfd7 8.Be3 b5 
9.a3 Nb6 10.f4 N8d7 11.Bg2 e5 12.Nc6 Qc7 13.Nb4 Bb7 14.f5 Nc4 15.Bc1 Ndb6 
16.Qf3 Rc8 17.O-O a5 18.Nbd5 Nxd5 19.Nxd5 Bxd5 20.exd5 f6 21.gxf6 gxf6 22.
b3 Nb6 23.Be3 Nd7 24.Qh5+ Ke7 25.Rac1 Qc3 26.Qe2 a4 27.Rf3 Qb2 28.Qxb5 Rc3
29.Re1 Rxc2 30.Bf2 axb3 31.Rxb3 Qa2 32.Rf1 Bh6 33.Qa4 Ra8 34.Qxa8 Qxb3 35.
Qh8 Rxf2 36.Qxh7+ Kd8 37.Rxf2 Be3 38.Qg8+ Kc7 39.Qg3 Qd1+ 40.Bf1 Qd4 41.h4
e4 42.Kg2 Bxf2 43.Qxf2 Qxd5 44.h5 e3+ 45.Qf3 Qd4 46.Kg3 Nc5 47.h6 Ne4+ 48.
Kh2 Nd2 49.Qe2 Qf4+ 50.Kg1 Nf3+ 51.Kh1 Qxh6+ 52.Kg2 Nh4+ 53.Kg1 Qg5+ 54.
Kh1 Nxf5 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Ree, Hans"]
[Black "Donner, Jan"]
[WhiteElo "2430"]
[BlackElo "2500"]
[Result "1-0"]
[ECO "E88"]
[EventDate "1972.??.??"]
[PlyCount "90"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 c6 8.Bd3 cxd5 9.
cxd5 Ne8 10.Qd2 Nd7 11.Nge2 Nc5 12.Bc2 a5 13.O-O Bd7 14.b3 b5 15.a3 Na6 
16.Bd3 Qb8 17.b4 axb4 18.axb4 Nxb4 19.Rxa8 Qxa8 20.Bxb5 Bxb5 21.Nxb5 Na6 
22.Qa5 Qb7 23.Qb6 Qxb6 24.Bxb6 Nb8 25.Bd8 f5 26.Be7 Rf7 27.Bxd6 Rb7 28.
Nec3 fxe4 29.fxe4 Nxd6 30.Nxd6 Rb3 31.Ndb5 Rb2 32.Ra1 Bf8 33.Kf1 Nd7 34.
Ra7 Nf6 35.d6 Rd2 36.Ke1 Bh6 37.Re7 Kf8 38.Rxe5 Rxg2 39.Nd5 Bg5 40.Nbc7 
Bh4+ 41.Kd1 Rxh2 42.Nxf6 Bxf6 43.d7 Kf7 44.Nd5 Rh1+ 45.Ke2 Rh2+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "9"]
[White "Uhlmann, Wolfgang"]
[Black "Robatsch, Karl"]
[WhiteElo "2570"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "70"]

1.c4 Nf6 2.Nc3 c5 3.Nf3 d5 4.cxd5 Nxd5 5.g3 Nc6 6.Bg2 Nc7 7.Qa4 Bd7 8.Qe4 
Ne6 9.e3 g6 10.d4 cxd4 11.exd4 Bg7 12.O-O Nexd4 13.Nxd4 Bxd4 14.Bh6 Qa5 
15.Rac1 Qf5 16.Qxf5 gxf5 17.Nb5 Be5 18.Rfe1 Bb8 19.Nd4 Nd8 20.Bh3 Nc6 21.
Nxf5 Bxf5 22.Bxf5 Bd6 23.a3 a5 24.h3 Kd8 25.Rc4 Kc7 26.Rec1 Ra6 27.Bg7 Rg8
28.Bc3 h5 29.Rh4 Rg5 30.Be4 f5 31.Bd2 Bxg3 32.fxg3 Rxg3+ 33.Kf2 Rb3 34.
Bxc6 Rxc6 35.Bxa5+ b6 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Browne, Walter Shawn"]
[Black "Enklaar, Bertus"]
[WhiteElo "2500"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1972.??.??"]
[PlyCount "111"]

1.e4 c5 2.Nf3 e6 3.Nc3 a6 4.d4 cxd4 5.Nxd4 Qc7 6.g3 Bb4 7.Ne2 Nf6 8.Bg2 
Be7 9.O-O Nc6 10.h3 d6 11.g4 O-O 12.g5 Nd7 13.f4 b5 14.a3 Rb8 15.f5 Re8 
16.Kh1 Nce5 17.Nf4 Bf8 18.Nce2 Nc5 19.Ng3 b4 20.g6 hxg6 21.fxg6 fxg6 22.
Nxg6 Nxg6 23.Qh5 e5 24.Qxg6 Re6 25.Qh5 Qe7 26.Bg5 Qe8 27.Qh4 Bd7 28.Rf2 
bxa3 29.bxa3 Qg6 30.Bf3 Qh7 31.Bh5 Be8 32.Re1 Bxh5 33.Nxh5 Rg6 34.Rg2 Ne6 
35.Reg1 Kh8 36.Be3 Rxg2 37.Rxg2 Rb7 38.Kh2 Rf7 39.Qg4 Nc7 40.Ng3 d5 41.
exd5 Nxd5 42.Bc1 Nf4 43.Rd2 Rf6 44.Rd8 Qxc2+ 45.Bd2 Ne6 46.Rd5 Nd4 47.Ne4 
Rf4 48.Qxf4 exf4 49.Rxd4 Qd1 50.Rd8 Qe2+ 51.Kg1 Kg8 52.Re8 Qd1+ 53.Kf2 Kf7
54.Rd8 Be7 55.Rd7 Ke8 56.Ra7 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Donner, Jan"]
[Black "Uhlmann, Wolfgang"]
[WhiteElo "2500"]
[BlackElo "2570"]
[Result "1/2-1/2"]
[ECO "D79"]
[EventDate "1972.??.??"]
[PlyCount "20"]

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 
Nc6 9.Ne5 Nxe5 10.dxe5 Ng4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Korchnoi, Viktor"]
[Black "Ree, Hans"]
[WhiteElo "2670"]
[BlackElo "2430"]
[Result "1-0"]
[ECO "A29"]
[EventDate "1972.??.??"]
[PlyCount "53"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 Bb4 5.Nd5 e4 6.Nh4 Bc5 7.Bg2 d6 8.d3 exd3
9.Qxd3 Ne5 10.Qc3 c6 11.Ne3 Qb6 12.O-O O-O 13.Nc2 a5 14.Be3 Re8 15.Rad1 
Neg4 16.Bxc5 Qxc5 17.h3 Ne5 18.Ne3 Be6 19.Nhf5 Bxf5 20.Nxf5 Rad8 21.Rd4 
Nxc4 22.Nxg7 Kxg7 23.Rg4+ Kf8 24.Qxf6 Ne5 25.Rh4 Kg8 26.Be4 Ng6 27.Rxh7 
1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Malich, Burkhard"]
[Black "Szabo, Laszlo"]
[WhiteElo "2450"]
[BlackElo "2525"]
[Result "1/2-1/2"]
[ECO "A21"]
[EventDate "1972.??.??"]
[PlyCount "34"]

1.c4 e5 2.Nc3 d6 3.Nf3 f5 4.d4 e4 5.Ng5 Be7 6.Nh3 Nf6 7.g3 c6 8.Bg2 Na6 9.
O-O Nc7 10.d5 c5 11.f3 exf3 12.exf3 O-O 13.b3 Rb8 14.a4 b6 15.Re1 a6 16.
Nf4 Re8 17.Bf1 Bf8 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Padevsky, Nikola"]
[Black "Ivkov, Borislav"]
[WhiteElo "2460"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "C93"]
[EventDate "1972.??.??"]
[PlyCount "28"]

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 h6 10.d4 Re8 11.Be3 Bb7 12.Nbd2 Bf8 13.dxe5 Nxe5 14.Nxe5 dxe5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Polugaevsky, Lev"]
[Black "Langeweg, Christian"]
[WhiteElo "2640"]
[BlackElo "2425"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1972.??.??"]
[PlyCount "99"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 c6 4.b3 Bf5 5.Bb2 h6 6.d3 e6 7.O-O Be7 8.Nbd2 O-O 
9.Qe1 Bh7 10.e4 a5 11.a3 Na6 12.Qe2 Nc5 13.e5 Nfd7 14.Nd4 Qb6 15.a4 Na6 
16.Bh3 Nc7 17.Kh1 Qa6 18.f4 c5 19.N4f3 b5 20.axb5 Qxb5 21.Nb1 Qc6 22.Nc3 
Ra7 23.Bg2 Nb6 24.Na4 Nca8 25.Bc3 Qb5 26.Rfb1 Nxa4 27.Rxa4 Nb6 28.Raa1 
Rfa8 29.Qe1 Nd7 30.Bd2 Qb6 31.g4 Nb8 32.Qg3 Nc6 33.f5 Nb4 34.Ne1 Qd8 35.
Qf2 Rc7 36.c4 Bh4 37.Qe2 Bxe1 38.Bxe1 dxc4 39.Bxa8 Qxa8+ 40.Qg2 Qa7 41.
dxc4 exf5 42.Rd1 Bg6 43.Rd8+ Kh7 44.g5 h5 45.Ra8 Qb7 46.Qxb7 Rxb7 47.R1xa5
f4 48.R8a7 Rb8 49.Bxb4 cxb4 50.Kg1 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Robatsch, Karl"]
[Black "Hartoch, Robert"]
[WhiteElo "2460"]
[BlackElo "2400"]
[Result "1-0"]
[ECO "B08"]
[EventDate "1972.??.??"]
[PlyCount "96"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O Bg4 7.h3 Bxf3 8.Bxf3 
Nc6 9.Ne2 e5 10.d5 Ne7 11.c4 c5 12.Nc3 Ne8 13.a3 f5 14.b4 b6 15.bxc5 bxc5 
16.Rb1 Nf6 17.Rb7 fxe4 18.Nxe4 Nxe4 19.Bxe4 Nf5 20.Bxf5 gxf5 21.Qh5 f4 22.
Bd2 Qf6 23.Bc3 f3 24.g3 Rf7 25.Rfb1 Raf8 26.Qg4 Qg6 27.Qxg6 hxg6 28.Bd2 
Bf6 29.h4 Rxb7 30.Rxb7 Rf7 31.Rb3 Be7 32.Kh2 Kg7 33.Kh3 Bf6 34.Rxf3 Rb7 
35.Bh6+ Kxh6 36.Rxf6 Rb2 37.Rxd6 Rxf2 38.Rc6 e4 39.Rxc5 e3 40.Rc7 Rc2 41.
Rxa7 Rxc4 42.Re7 Rd4 43.Rxe3 Rxd5 44.a4 Ra5 45.Ra3 g5 46.Kg4 gxh4 47.Kxh4 
Kg6 48.Kg4 Kf6 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "10"]
[White "Timman, Jan"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2445"]
[BlackElo "2510"]
[Result "0-1"]
[ECO "A61"]
[EventDate "1972.??.??"]
[PlyCount "74"]

1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 d6 6.Nf3 g6 7.Bf4 Bg7 8.Qa4+ 
Bd7 9.Qb3 Qc7 10.e4 O-O 11.Be2 Nh5 12.Be3 Bg4 13.h3 Bxf3 14.Bxf3 Nd7 15.
Bxh5 gxh5 16.O-O Rae8 17.Qc2 a6 18.a4 Qd8 19.a5 Kh8 20.Ra4 Qc8 21.Nd1 b5 
22.axb6 Nxb6 23.Ra2 f5 24.Qb3 Qb7 25.exf5 Rxf5 26.Nc3 Bd4 27.Rfa1 Qg7 28.
Qxb6 Rg8 29.Bxd4 cxd4 30.g3 Rxf2 31.Qxd6 Rf6 32.Qxf6 Qxf6 33.Ne4 Qe5 34.
Re1 Rxg3+ 35.Nxg3 Qxe1+ 36.Nf1 Qb1 37.Rxa6 d3 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Enklaar, Bertus"]
[Black "Timman, Jan"]
[BlackElo "2445"]
[Result "0-1"]
[ECO "E90"]
[EventDate "1972.??.??"]
[PlyCount "59"]

1.d4 g6 2.e4 Bg7 3.c4 d6 4.Nc3 c5 5.d5 Nf6 6.Nf3 O-O 7.h3 e5 8.Bg5 h6 9.
Bd2 Nh5 10.g3 a6 11.Nh2 Nf6 12.Ng4 Kh7 13.Nxf6+ Qxf6 14.h4 Qe7 15.h5 Nd7 
16.Qc1 g5 17.Bh3 b5 18.cxb5 axb5 19.Nxb5 f5 20.Bxf5+ Rxf5 21.exf5 e4 22.
Bc3 Ne5 23.Bxe5 Qxe5 24.g4 Ra4 25.Nc3 Rd4 26.Qe3 Ba6 27.Rd1 Rb4 28.Rd2 Bd3
29.Qg3 Qxc3 30.f4 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Hartoch, Robert"]
[Black "Donner, Jan"]
[WhiteElo "2400"]
[BlackElo "2500"]
[Result "0-1"]
[ECO "A19"]
[EventDate "1972.??.??"]
[PlyCount "54"]

1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8 5.Nf3 Nc6 6.d4 cxd4 7.Nxd4 Nxe5 8.Bf4 
d6 9.Qd2 Bd7 10.O-O-O Rc8 11.Kb1 a6 12.Nb3 Nxc4 13.Bxc4 Rxc4 14.Bxd6 Bxd6 
15.Qxd6 Qc7 16.Na5 Qxd6 17.Rxd6 Rc7 18.Rb6 Bc8 19.Ne4 Nf6 20.Nd6+ Ke7 21.
Ndxb7 Nd5 22.Rb3 e5 23.a3 Bf5+ 24.Ka1 Rhc8 25.Rg3 Nf4 26.Rxg7 Be6 27.b4 
Rc1+ 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Ivkov, Borislav"]
[Black "Malich, Burkhard"]
[WhiteElo "2560"]
[BlackElo "2450"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1972.??.??"]
[PlyCount "73"]

1.c4 Nf6 2.Nc3 e5 3.Nf3 Nc6 4.g3 Bb4 5.Bg2 O-O 6.O-O Re8 7.d3 h6 8.e4 a6 
9.a3 Bxc3 10.bxc3 b5 11.Nd2 Rb8 12.Bb2 d6 13.cxb5 axb5 14.d4 d5 15.exd5 
Nxd5 16.Re1 Bb7 17.c4 bxc4 18.Nxc4 Nxd4 19.Rxe5 Rxe5 20.Nxe5 Ne6 21.Qc2 
Qe8 22.Rd1 Nf6 23.Bxb7 Rxb7 24.Nf3 Nh7 25.h4 Qb5 26.Rd2 Nhf8 27.Ne5 Qc5 
28.Nc4 Rb8 29.Ne5 Qxc2 30.Rxc2 c5 31.a4 Ra8 32.Rc4 f6 33.Nd3 Nd7 34.Bc3 
Nb6 35.Re4 Nxa4 36.Rxe6 Nxc3 37.Nxc5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Langeweg, Christian"]
[Black "Robatsch, Karl"]
[WhiteElo "2425"]
[BlackElo "2460"]
[Result "1-0"]
[ECO "A41"]
[EventDate "1972.??.??"]
[PlyCount "91"]

1.Nf3 d6 2.d4 Nd7 3.e4 g6 4.Bc4 e6 5.Bb3 Bg7 6.Bg5 Ne7 7.Qd2 h6 8.Bf4 b6 
9.Nc3 a6 10.a4 Bb7 11.h3 Nf6 12.Qe2 d5 13.exd5 exd5 14.a5 O-O 15.axb6 cxb6
16.Ne5 Nf5 17.Qd2 b5 18.O-O Kh7 19.f3 Nd6 20.Ne2 Nc4 21.Qc1 Nd7 22.Nd3 Re8
23.Rf2 Qb6 24.c3 Re7 25.Bc2 Rae8 26.Ng3 a5 27.b3 Ne3 28.Bxe3 Rxe3 29.Ne5 
R8xe5 30.dxe5 Bxe5 31.Nf5 gxf5 32.Bxf5+ Kg7 33.Bxd7 Bxc3 34.Kh2 Qd6+ 35.f4
Qxd7 36.Qxe3 Bxa1 37.Rf3 f5 38.Rg3+ Kh7 39.Qb6 Bg7 40.Qg6+ Kh8 41.Re3 Bf8 
42.Rg3 Qg7 43.Qe6 Qh7 44.Qf6+ Bg7 45.Qf7 Bc6 46.Rg6 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Ljubojevic, Ljubomir"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2510"]
[BlackElo "2640"]
[Result "0-1"]
[ECO "B87"]
[EventDate "1972.??.??"]
[PlyCount "126"]

1.e4 c5 2.Nf3 d6 3.Nc3 Nf6 4.d4 cxd4 5.Nxd4 a6 6.Bc4 e6 7.Bb3 b5 8.Be3 Be7
9.Qe2 O-O 10.O-O-O b4 11.Na4 Qa5 12.Nf3 Nbd7 13.Nd2 Bb7 14.f3 Bc6 15.Nc4 
Qc7 16.Nab6 Rab8 17.Nxd7 Bxd7 18.Qf2 Bb5 19.Nb6 Qc6 20.Kb1 Bd8 21.Qg3 Bxb6
22.Rxd6 Bc7 23.Rxc6 Bxg3 24.Rxe6 fxe6 25.Bxe6+ Kh8 26.hxg3 Rfe8 27.Bb3 a5 
28.g4 Nxe4 29.fxe4 Rxe4 30.Ba7 Rbe8 31.a4 bxa3 32.bxa3 Re1+ 33.Rxe1 Rxe1+ 
34.Kb2 Bc6 35.g3 Re4 36.g5 Rg4 37.Bb8 Rxg5 38.Kc3 a4 39.Be6 Be4 40.Bf4 Rg6
41.Bd7 Ra6 42.Bb5 Ra8 43.Kb2 g5 44.Be5+ Kg8 45.c4 Kf7 46.Kc3 Ke6 47.Kd4 
Bf3 48.c5 h5 49.Bc4+ Kd7 50.Bb5+ Bc6 51.Be2 h4 52.Bg4+ Ke7 53.gxh4 gxh4 
54.Ke3 Rd8 55.Bf5 Rd1 56.Kf4 Rg1 57.Bd6+ Kf7 58.Bg4 Rg3 59.Kg5 Rxa3 60.
Kxh4 Re3 61.Bf4 Re4 62.Kg5 a3 63.Bf3 Rxf4 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Ree, Hans"]
[Black "Padevsky, Nikola"]
[WhiteElo "2430"]
[BlackElo "2460"]
[Result "1/2-1/2"]
[ECO "A90"]
[EventDate "1972.??.??"]
[PlyCount "58"]

1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 d5 5.O-O Bd6 6.c4 c6 7.Nbd2 O-O 8.Qc2 Ne4 
9.Ne5 b6 10.cxd5 cxd5 11.Ndf3 Bb7 12.h4 Nd7 13.Bf4 Ndf6 14.Nd3 Rc8 15.Qb3 
Ba6 16.Bxd6 Qxd6 17.Qa4 Bc4 18.Nfe5 Rc7 19.Rfc1 Rfc8 20.Qd1 a5 21.Qe1 Qe7 
22.Nf4 Nd7 23.Nxd7 Qxd7 24.e3 Kf7 25.Qd1 g6 26.Bf1 Nf6 27.Bd3 Qb5 28.b3 
Bxd3 29.Nxd3 Nd7 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Szabo, Laszlo"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2525"]
[BlackElo "2500"]
[Result "1-0"]
[ECO "B99"]
[EventDate "1972.??.??"]
[PlyCount "84"]

1.Nf3 c5 2.e4 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 h6 8.Bh4 Be7 
9.Qf3 Nbd7 10.O-O-O Qc7 11.Bd3 g5 12.fxg5 Ne5 13.Qe2 Nfg4 14.h3 hxg5 15.
Bg3 Nf6 16.Kb1 Bd7 17.Bf2 O-O-O 18.Nb3 Rh5 19.Bd4 g4 20.Qf2 Rdh8 21.Bb6 
Qb8 22.Be2 Bc6 23.Rhe1 Rh4 24.Na5 gxh3 25.Nxc6 Nxc6 26.gxh3 Nd7 27.Qxf7 
Nxb6 28.Qxe6+ Kc7 29.Bg4 R4h6 30.Nd5+ Nxd5 31.Qd7+ Kb6 32.exd5 Rd8 33.Qf5 
Ne5 34.Qf2+ Kc7 35.Rd3 b6 36.Rc3+ Kb7 37.Rc6 Nxc6 38.dxc6+ Kxc6 39.Rxe7 d5
40.Qd4 b5 41.b4 Qb6 42.Qg7 Rdh8 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "11"]
[White "Uhlmann, Wolfgang"]
[Black "Korchnoi, Viktor"]
[WhiteElo "2570"]
[BlackElo "2670"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1972.??.??"]
[PlyCount "54"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 Nd4 5.Bg2 Nxf3+ 6.Bxf3 Bb4 7.O-O O-O 8.
Qb3 Bc5 9.d3 d6 10.Na4 Nd7 11.Bg2 a5 12.Nxc5 Nxc5 13.Qc3 Qe7 14.e3 e4 15.
dxe4 Nxe4 16.Qd4 Re8 17.b3 Qe5 18.Bb2 Qxd4 19.exd4 a4 20.Rfe1 Bf5 21.g4 
Bg6 22.Re3 axb3 23.axb3 Rxa1+ 24.Bxa1 f5 25.gxf5 Bxf5 26.Bc3 Kf7 27.Be1 b6
1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Donner, Jan"]
[Black "Langeweg, Christian"]
[WhiteElo "2500"]
[BlackElo "2425"]
[Result "0-1"]
[ECO "E58"]
[EventDate "1972.??.??"]
[PlyCount "84"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d5 7.O-O Nc6 8.a3 Bxc3 
9.bxc3 Qc7 10.cxd5 exd5 11.Nh4 c4 12.Bc2 Ne4 13.Qe1 Qe7 14.g3 Bh3 15.Ng2 
f5 16.f3 Nd6 17.a4 Rae8 18.Rf2 Bxg2 19.Kxg2 Rf6 20.Re2 Re6 21.Kg1 Nd8 22.
Ba3 N8f7 23.Bxf5 Rxe3 24.Rxe3 Qxe3+ 25.Qxe3 Rxe3 26.Bg4 h5 27.Bxh5 Rxc3 
28.Kg2 Kh7 29.Bxd6 Nxd6 30.Re1 Rc2+ 31.Kh3 Rb2 32.Re6 Rb6 33.Bg6+ Kg8 34.
Re5 Rc6 35.Rxd5 c3 36.Bc2 Nc4 37.Rd8+ Kf7 38.d5 Rh6+ 39.Kg4 Ne3+ 40.Kf4 
Nxc2 41.Rc8 Nb4 42.Ke4 c2 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "Ree, Hans"]
[WhiteElo "2560"]
[BlackElo "2430"]
[Result "1/2-1/2"]
[ECO "D94"]
[EventDate "1972.??.??"]
[PlyCount "55"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2 c5 7.dxc5 Na6 8.cxd5 
Nxd5 9.Nxd5 Qxd5 10.Bxa6 bxa6 11.Bc3 Bxc3+ 12.bxc3 Qxc5 13.Qd4 Qa5 14.O-O 
Bb7 15.Rab1 Bxf3 16.gxf3 Qxa2 17.c4 Rac8 18.Qxa7 e6 19.Ra1 Qxc4 20.Qxa6 
Qd5 21.Qe2 Rc4 22.f4 Rfc8 23.Rfd1 Qe4 24.Qb2 Qf5 25.Rdc1 Qg4+ 26.Kf1 Rxc1+
27.Rxc1 Rxc1+ 28.Qxc1 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Korchnoi, Viktor"]
[Black "Hartoch, Robert"]
[WhiteElo "2670"]
[BlackElo "2400"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1972.??.??"]
[PlyCount "91"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.g3 e6 5.dxe6 fxe6 6.Nc3 Bg7 7.Bg2 O-O 8.Bf4 Ne8
9.Qd2 Nc6 10.h4 Ne5 11.Bxe5 Bxe5 12.Nf3 Bxc3 13.Qxc3 Qf6 14.Qd2 Rb8 15.a4 
a6 16.O-O b5 17.cxb5 axb5 18.a5 d5 19.b4 c4 20.e4 Nc7 21.e5 Qe7 22.Nd4 Bd7
23.f4 Na6 24.Rab1 c3 25.Qxc3 Rfc8 26.Qd2 Rc4 27.Nc2 Rbc8 28.Rb2 Be8 29.Kh2
h5 30.Rf2 d4 31.Bf1 d3 32.Qxd3 Qa7 33.Rd2 Qf7 34.Qe3 Rc3 35.Qf2 Bc6 36.Nd4
Bd5 37.Bg2 Bc4 38.Rbc2 Ra3 39.Bh3 Re8 40.Nc6 Bd5 41.Rxd5 exd5 42.Qb6 g5 
43.hxg5 h4 44.Qxa6 hxg3+ 45.Kg2 Qxf4 46.Ne7+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Malich, Burkhard"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2450"]
[BlackElo "2500"]
[Result "1-0"]
[ECO "A61"]
[EventDate "1972.??.??"]
[PlyCount "83"]

1.d4 c5 2.d5 Nf6 3.c4 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bf4 a6 8.a4 Bg7 
9.e4 O-O 10.Nd2 Re8 11.Be2 Qc7 12.O-O Nbd7 13.h3 Ne5 14.Qc2 h6 15.Bg3 g5 
16.f4 gxf4 17.Bxf4 Qe7 18.Kh1 Ng6 19.Bh2 Nd7 20.Nd1 Nde5 21.Ra3 Rb8 22.Ne3
Bd7 23.a5 Kh8 24.Qc1 Kh7 25.Qe1 b5 26.Qf2 Qg5 27.Bg3 h5 28.h4 Qh6 29.Nf3 
Nxf3 30.Qxf3 Bxb2 31.Qxf7+ Kh8 32.Qxd7 Bxa3 33.Nf5 Qh7 34.Qxd6 Bb2 35.Qxa6
Ra8 36.Qxb5 Be5 37.Bxe5+ Rxe5 38.d6 Rxe4 39.Bf3 Ree8 40.Bxa8 Rxa8 41.Qb2+ 
Kg8 42.Qf6 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Padevsky, Nikola"]
[Black "Uhlmann, Wolfgang"]
[WhiteElo "2460"]
[BlackElo "2570"]
[Result "0-1"]
[ECO "E89"]
[EventDate "1972.??.??"]
[PlyCount "62"]

1.c4 g6 2.Nc3 Bg7 3.d4 d6 4.e4 e5 5.Nge2 Nf6 6.f3 O-O 7.Be3 Nbd7 8.Qd2 c6 
9.d5 cxd5 10.cxd5 Ne8 11.Nc1 f5 12.Nb3 Nef6 13.Be2 a6 14.O-O b5 15.a3 Bb7 
16.g4 Rc8 17.h3 fxe4 18.fxe4 Rxc3 19.Qxc3 Nxe4 20.Rxf8+ Qxf8 21.Qd3 Ng3 
22.Bg5 Nxe2+ 23.Qxe2 Bxd5 24.Nd2 Nc5 25.Rf1 Qe8 26.b4 Ne6 27.Be3 Bb7 28.
Rc1 d5 29.Nb3 d4 30.Bxd4 exd4 31.Nc5 Bh6 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Polugaevsky, Lev"]
[Black "Enklaar, Bertus"]
[WhiteElo "2640"]
[Result "1-0"]
[ECO "D56"]
[EventDate "1972.??.??"]
[PlyCount "87"]

1.c4 e6 2.Nc3 d5 3.d4 Be7 4.Nf3 Nf6 5.Bg5 O-O 6.e3 h6 7.Bh4 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 Nd7 13.O-O b6 14.Bd3 c5 15.
Bb5 cxd4 16.Qxd4 Nf6 17.Rfc1 Nd5 18.Rc4 Rd8 19.Qe5 Bd7 20.Bxd7 Qxd7 21.Nd4
Rdc8 22.Nc6 Kf8 23.h3 Nf6 24.b4 a6 25.a4 Ne8 26.Qe4 Nf6 27.Ne5 Qe8 28.Qd4 
Rxc4 29.Rxc4 Qb8 30.Rc6 b5 31.Rb6 Qd8 32.Qxd8+ Rxd8 33.axb5 axb5 34.Rxb5 
Ne4 35.Rb7 Rd1+ 36.Kh2 Nd6 37.Rc7 Ke8 38.Ra7 Rd2 39.f3 Rb2 40.e4 h5 41.Ra6
Nb7 42.Ra8+ Nd8 43.Nc6 Rd2 44.Kg3 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Robatsch, Karl"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2460"]
[BlackElo "2510"]
[Result "0-1"]
[ECO "B04"]
[EventDate "1972.??.??"]
[PlyCount "79"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.exd6 cxd6 8.a4 
O-O 9.a5 N6d7 10.O-O Nc6 11.a6 bxa6 12.Re1 Rb8 13.Nc3 Nf6 14.d5 Na5 15.Ba2
Qc7 16.h3 Rb4 17.Re2 Nc4 18.Bxc4 Rxc4 19.Bg5 Bb7 20.Qd2 Rc5 21.Be3 Nxd5 
22.Bxc5 Nxc3 23.bxc3 Qxc5 24.Nd4 e6 25.Rb1 Bd5 26.Ree1 Rc8 27.Ne2 a5 28.
Ra1 a4 29.Qf4 a3 30.Qa4 a2 31.Red1 Bxc3 32.Nxc3 Qxc3 33.Qf4 Rc6 34.h4 h5 
35.Rdc1 Rc4 36.Qg3 Qxg3 37.fxg3 Rc3 38.Kf2 Bc4 39.Ke1 Rxg3 40.Kd2 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "12"]
[White "Timman, Jan"]
[Black "Szabo, Laszlo"]
[WhiteElo "2445"]
[BlackElo "2525"]
[Result "1/2-1/2"]
[ECO "A05"]
[EventDate "1972.??.??"]
[PlyCount "34"]

1.Nf3 Nf6 2.g3 g6 3.b3 Bg7 4.Bb2 d6 5.d4 b5 6.Na3 c6 7.Bg2 O-O 8.O-O Bb7 
9.Ne1 d5 10.Nd3 Nbd7 11.c4 bxc4 12.bxc4 Ne4 13.Rc1 Qa5 14.f3 Nd6 15.Qe1 
Qa4 16.Qd1 Qa5 17.Qe1 Qa4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Browne, Walter Shawn"]
[Black "Timman, Jan"]
[WhiteElo "2500"]
[BlackElo "2445"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1972.??.??"]
[PlyCount "80"]

1.e4 g6 2.d4 d6 3.Nc3 Bg7 4.Nf3 Bg4 5.Be2 Nc6 6.Be3 e5 7.dxe5 dxe5 8.Qxd8+
Rxd8 9.Nd5 Rc8 10.Bb5 Bd7 11.O-O-O a6 12.Bc4 b5 13.Be2 f5 14.exf5 gxf5 15.
Ng5 h5 16.f4 e4 17.Rd2 Nf6 18.Nxf6+ Bxf6 19.Rhd1 Rd8 20.Nf7 Kxf7 21.Rxd7+ 
Kg6 22.Rxc7 Nb4 23.Rcd7 Nd3+ 24.R7xd3 exd3 25.Bxd3 Rd5 26.Rf1 Rc8 27.Kb1 
a5 28.a3 b4 29.axb4 axb4 30.Ka2 b3+ 31.Kxb3 Rd7 32.Bb5 Rb8 33.Ka4 Re7 34.
Bc5 Re4+ 35.b4 Bd4 36.Bxd4 Rxd4 37.Rf2 Rd1 38.Bd3 Rb1 39.Ka5 R1xb4 40.Re2 
Rb1 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Enklaar, Bertus"]
[Black "Robatsch, Karl"]
[BlackElo "2460"]
[Result "1/2-1/2"]
[ECO "D91"]
[EventDate "1972.??.??"]
[PlyCount "78"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 Ne4 6.Bh4 Nxc3 7.bxc3 dxc4 8.e3 
Be6 9.Be2 O-O 10.O-O c5 11.Qc2 Nc6 12.dxc5 Bf5 13.Qb2 Be4 14.Nd2 Bd3 15.
Nxc4 Bxc3 16.Qxc3 Bxe2 17.Rfc1 Qd3 18.Qe1 Bg4 19.Rc3 Qd7 20.e4 Qd4 21.Ne3 
Be6 22.f3 Rad8 23.Rd1 Qe5 24.Rxd8 Rxd8 25.a3 Qd4 26.Bf2 Qd2 27.Rc2 Qxe1+ 
28.Bxe1 Rd3 29.Rc3 Rxc3 30.Bxc3 Bb3 31.Kf2 f6 32.Nd5 Kf7 33.Ke3 Ke6 34.
Nf4+ Kd7 35.Ne2 e5 36.f4 Bc4 37.Ng1 Ke6 38.fxe5 fxe5 39.Nf3 h6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Hartoch, Robert"]
[Black "Padevsky, Nikola"]
[WhiteElo "2400"]
[BlackElo "2460"]
[Result "1/2-1/2"]
[ECO "B36"]
[EventDate "1972.??.??"]
[PlyCount "26"]

1.c4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.e4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6 8.Be3 
Bg7 9.f3 O-O 10.Qd2 Be6 11.Rc1 Qa5 12.Nd5 Qxa2 13.Nxe7+ Kh8 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Langeweg, Christian"]
[Black "Korchnoi, Viktor"]
[WhiteElo "2425"]
[BlackElo "2670"]
[Result "0-1"]
[ECO "A34"]
[EventDate "1972.??.??"]
[PlyCount "62"]

1.Nf3 c5 2.c4 Nf6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Nc6 6.Bg2 Nc7 7.a3 g6 8.d3 Bg7
9.O-O O-O 10.Qa4 Nd4 11.Nxd4 cxd4 12.Ne4 Bd7 13.Qb3 b6 14.Ng5 Rc8 15.Bd2 
h6 16.Nf3 Ne6 17.a4 Nc5 18.Qd1 Qe8 19.b3 Be6 20.Ra3 Na6 21.b4 Qd7 22.Re1 
Nc7 23.Qa1 Nd5 24.Nxd4 Nxb4 25.Bxb4 Bxd4 26.Bc3 Bxc3 27.Rxc3 Rxc3 28.Qxc3 
Qxa4 29.Ra1 Qd7 30.Ra6 Rc8 31.Qa3 Rc2 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Ljubojevic, Ljubomir"]
[Black "Donner, Jan"]
[WhiteElo "2510"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "B09"]
[EventDate "1972.??.??"]
[PlyCount "87"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4 c5 6.d5 O-O 7.Nge2 e6 8.dxe6 Bxe6
9.Bxe6 fxe6 10.O-O Nc6 11.h3 d5 12.e5 Ne8 13.a3 Nc7 14.b4 cxb4 15.axb4 
Nxb4 16.Rb1 a5 17.Nd4 Qd7 18.Ba3 Rfc8 19.Bxb4 axb4 20.Rxb4 Na6 21.Rb3 Rc4 
22.Ncb5 Nc5 23.Re3 Bf8 24.Kh2 Ra5 25.Nc3 b5 26.h4 b4 27.Nce2 Ne4 28.h5 Bc5
29.hxg6 hxg6 30.Rh3 Ra8 31.Rff3 Kg7 32.Qe1 Be7 33.g4 Rf8 34.f5 exf5 35.
gxf5 Ng5 36.f6+ Bxf6 37.exf6+ Rxf6 38.Qa1 Nxf3+ 39.Rxf3 Rxf3 40.Nxf3+ Kg8 
41.Ned4 Qd6+ 42.Kg2 Rc8 43.Qa7 Re8 44.Qb7 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Ree, Hans"]
[Black "Malich, Burkhard"]
[WhiteElo "2430"]
[BlackElo "2450"]
[Result "1-0"]
[ECO "D81"]
[EventDate "1972.??.??"]
[PlyCount "81"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3 c6 5.cxd5 cxd5 6.Bf4 Bg7 7.Nf3 O-O 8.e3 
Nc6 9.Be2 Na5 10.Qb4 Nc6 11.Qa3 Nh5 12.Bg5 h6 13.Bh4 g5 14.Bg3 Nxg3 15.
hxg3 e6 16.g4 a6 17.O-O h5 18.gxh5 g4 19.Nh2 f5 20.f4 Qh4 21.Rfd1 Rf6 22.
Bb5 Bf8 23.Qa4 Bd7 24.Ne2 Rc8 25.Bxc6 Bxc6 26.Qc2 Rh6 27.Nf1 Bb5 28.Qxc8 
Bxe2 29.Re1 Bxf1 30.Kxf1 Qh1+ 31.Kf2 Qxh5 32.Ke2 g3+ 33.Kd3 Qf7 34.Rh1 
Rxh1 35.Rxh1 b5 36.Rc1 Kg7 37.Qc7 Be7 38.Qe5+ Bf6 39.Qc7 Be7 40.Rc6 Kf6 
41.Qe5+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Szabo, Laszlo"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2525"]
[BlackElo "2640"]
[Result "1/2-1/2"]
[ECO "E52"]
[EventDate "1972.??.??"]
[PlyCount "20"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 b6 7.O-O Bb7 8.Qe2 Nbd7
9.Rd1 dxc4 10.Bxc4 Qe7 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "13"]
[White "Uhlmann, Wolfgang"]
[Black "Ivkov, Borislav"]
[WhiteElo "2570"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "B37"]
[EventDate "1972.??.??"]
[PlyCount "116"]

1.c4 g6 2.Nc3 c5 3.Nf3 Bg7 4.d4 cxd4 5.Nxd4 Nc6 6.Nc2 d6 7.e4 Nf6 8.Be2 
Nd7 9.Be3 Nc5 10.Qd2 Qa5 11.f3 Be6 12.O-O O-O 13.Rab1 Bxc3 14.bxc3 Ne5 15.
Bh6 Rfe8 16.Ne3 f6 17.Nd5 Rac8 18.Be3 b6 19.Bd4 Qa4 20.Rb4 Qd7 21.Qh6 Rf8 
22.Rbb1 Qe8 23.Qh4 Ncd7 24.Rb4 Nc6 25.Rb2 Na5 26.Rd1 Ne5 27.f4 Nexc4 28.
Rb4 b5 29.f5 Bf7 30.Qh6 Bxd5 31.exd5 a6 32.Bg4 Ne5 33.Bxe5 fxe5 34.fxg6 
Qxg6 35.Be6+ Kh8 36.Qxg6 hxg6 37.Bxc8 Rxc8 38.Rd3 Nc4 39.Kf2 Rc5 40.a4 Kg7
41.axb5 axb5 42.Rb1 Nb6 43.h4 Nxd5 44.Rb3 e4 45.Rg3 Kf6 46.Ke2 e5 47.Ra3 
e3 48.Ra6 Nf4+ 49.Kxe3 Rxc3+ 50.Kf2 Rc2+ 51.Kf1 Rc1+ 52.Kf2 Rc2+ 53.Kf1 
Ke6 54.Rg5 b4 55.Rb6 Rb2 56.Rg4 Kf5 57.Rg5+ Ke6 58.Rg4 Kd7 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Donner, Jan"]
[Black "Enklaar, Bertus"]
[WhiteElo "2500"]
[Result "1-0"]
[ECO "A79"]
[EventDate "1972.??.??"]
[PlyCount "81"]

1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 d6 6.Nf3 g6 7.e4 Bg7 8.Be2 O-O 
9.O-O Re8 10.Nd2 Na6 11.f3 Nc7 12.a4 b6 13.Nc4 Ba6 14.Ne3 Bxe2 15.Qxe2 a6 
16.Rb1 Nh5 17.g3 Qd7 18.Nc4 Rab8 19.g4 Bd4+ 20.Kh1 Ng7 21.Qd3 Rf8 22.Bf4 
Nge8 23.e5 dxe5 24.Nxe5 Bxe5 25.Bxe5 f6 26.Bg3 Nd6 27.Rbe1 Rbe8 28.Ne4 
Nxe4 29.fxe4 Ne6 30.a5 b5 31.Kg2 c4 32.Qe3 Ng5 33.Rf4 f5 34.gxf5 gxf5 35.
Rg4 fxg4 36.Qxg5+ Qg7 37.Qxg7+ Kxg7 38.e5 Rf5 39.d6 Rh5 40.d7 Rd8 41.e6 
1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Ivkov, Borislav"]
[Black "Hartoch, Robert"]
[WhiteElo "2560"]
[BlackElo "2400"]
[Result "1-0"]
[ECO "E91"]
[EventDate "1972.??.??"]
[PlyCount "91"]

1.Nf3 g6 2.c4 Bg7 3.d4 Nf6 4.Nc3 c5 5.e4 d6 6.Be2 O-O 7.O-O Na6 8.d5 Nc7 
9.Bf4 Nd7 10.Qd2 Rb8 11.Rfe1 Ne5 12.Nxe5 dxe5 13.Be3 b6 14.a3 f5 15.f3 f4 
16.Bf2 Ne6 17.Bd1 Nd4 18.b4 Bd7 19.Rb1 Qc7 20.bxc5 bxc5 21.Ba4 a6 22.Bxd7 
Qxd7 23.Qd3 g5 24.Rxb8 Rxb8 25.Rb1 Rxb1+ 26.Qxb1 g4 27.Qd1 gxf3 28.gxf3 
Qh3 29.Bxd4 exd4 30.Na4 Qd7 31.Nxc5 Qd6 32.Nd3 Qxa3 33.c5 Qc3 34.c6 a5 35.
Qc1 Qxc1+ 36.Nxc1 Be5 37.Nd3 Bc7 38.Nc5 Kf7 39.Kf2 Ke8 40.Ke2 Bd6 41.Na4 
e5 42.dxe6 Kd8 43.Nb6 Ke7 44.c7 Bxc7 45.Nd5+ Kxe6 46.Nxc7+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Korchnoi, Viktor"]
[Black "Ljubojevic, Ljubomir"]
[WhiteElo "2670"]
[BlackElo "2510"]
[Result "1-0"]
[ECO "E41"]
[EventDate "1972.??.??"]
[PlyCount "53"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 b6 6.Nf3 Bb7 7.O-O O-O 8.Na4 cxd4
9.exd4 Bxf3 10.Qxf3 Nc6 11.Be3 d5 12.Rfd1 dxc4 13.Bxc4 Rc8 14.a3 Bd6 15.
Nc3 Bb8 16.Ba6 Qd6 17.Bxc8 Qxh2+ 18.Kf1 Rxc8 19.Rac1 Qd6 20.d5 Ne5 21.Ne4 
Rxc1 22.Nxd6 Nxf3 23.Rxc1 Bxd6 24.Rc8+ Bf8 25.dxe6 fxe6 26.gxf3 Nd5 27.Ra8
1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Malich, Burkhard"]
[Black "Timman, Jan"]
[WhiteElo "2450"]
[BlackElo "2445"]
[Result "1-0"]
[ECO "A37"]
[EventDate "1972.??.??"]
[PlyCount "71"]

1.c4 c5 2.Nf3 g6 3.Nc3 Bg7 4.g3 Nc6 5.Bg2 e5 6.a3 a5 7.O-O Nge7 8.Ne1 O-O 
9.Nc2 d6 10.Rb1 Be6 11.Nd5 Rb8 12.d3 b5 13.Bg5 f6 14.Bd2 bxc4 15.dxc4 f5 
16.Bc3 e4 17.Bxg7 Kxg7 18.Nce3 Nd4 19.Nf4 Bf7 20.h4 h6 21.Nc2 Qb6 22.Nxd4 
cxd4 23.b3 Qc5 24.Qc1 Rb6 25.f3 d3+ 26.Kh2 dxe2 27.Nxe2 exf3 28.Bxf3 Rfb8 
29.Qc3+ Qe5 30.Nd4 f4 31.Rfe1 Rxb3 32.Rxb3 Rxb3 33.Rxe5 Rxc3 34.Rxe7 Kf6 
35.Rd7 Rxc4 36.Rxf7+ 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Padevsky, Nikola"]
[Black "Langeweg, Christian"]
[WhiteElo "2460"]
[BlackElo "2425"]
[Result "0-1"]
[ECO "D38"]
[EventDate "1972.??.??"]
[PlyCount "98"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.cxd5 exd5 6.Bg5 h6 7.Bxf6 Qxf6 8.Qb3
c5 9.e3 O-O 10.dxc5 Bxc3+ 11.Qxc3 Qxc3+ 12.bxc3 Nd7 13.Rd1 Nxc5 14.Rxd5 b6
15.Rd4 Be6 16.Bc4 Bxc4 17.Rxc4 Rfc8 18.Rd4 Ne6 19.Rd3 Rc4 20.Nd4 Nc5 21.
Rd2 Ne4 22.Rb2 Nxc3 23.Kd2 Rac8 24.Ra1 Kf8 25.Kd3 Nd5 26.Kd2 a6 27.Rc2 
Rxc2+ 28.Nxc2 Nc3 29.f3 b5 30.a3 Nd5 31.Rb1 Nb6 32.Rb4 Nc4+ 33.Kd3 Rd8+ 
34.Kc3 Rd1 35.a4 Nb6 36.Rd4 Nxa4+ 37.Kb4 Rc1 38.Na3 Nb6 39.Ka5 Nc4+ 40.
Nxc4 Rxc4 41.Rxc4 bxc4 42.Kb4 Ke7 43.e4 Kd6 44.f4 c3 45.Kxc3 Kc5 46.g3 h5 
47.h3 a5 48.g4 hxg4 49.hxg4 g5 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Polugaevsky, Lev"]
[Black "Browne, Walter Shawn"]
[WhiteElo "2640"]
[BlackElo "2500"]
[Result "1/2-1/2"]
[ECO "B36"]
[EventDate "1972.??.??"]
[PlyCount "27"]

1.c4 c5 2.Nf3 g6 3.d4 cxd4 4.Nxd4 Nc6 5.e4 Nf6 6.Nc3 d6 7.f3 Nxd4 8.Qxd4 
Bg7 9.Be3 O-O 10.Qd2 Be6 11.Rc1 Qa5 12.Be2 Rfe8 13.b3 a6 14.Nd5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Ree, Hans"]
[Black "Uhlmann, Wolfgang"]
[WhiteElo "2430"]
[BlackElo "2570"]
[Result "1/2-1/2"]
[ECO "D81"]
[EventDate "1972.??.??"]
[PlyCount "81"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3 dxc4 5.Qxc4 Bg7 6.e4 O-O 7.Be2 Nfd7 8.Nf3 
Nb6 9.Qc5 Bg4 10.Be3 Bxf3 11.Bxf3 Na6 12.Qg5 Bxd4 13.Bxd4 Qxd4 14.Qxe7 
Rae8 15.Qh4 Na4 16.Rd1 Qb4 17.a3 Qxb2 18.Nd5 Kg7 19.O-O c6 20.e5 Qxe5 21.
Qxa4 cxd5 22.Rxd5 Qc3 23.Qa5 Qc8 24.Qd2 Kg8 25.Rc1 Qe6 26.Rd6 Qe7 27.h3 
Nb8 28.Rd1 Rc8 29.Qd4 Nc6 30.Bxc6 Rxc6 31.Rd7 Qxa3 32.Rxb7 a5 33.Ra7 Rc1 
34.Rxc1 Qxc1+ 35.Kh2 Re8 36.g3 Qe1 37.Qf4 Re7 38.Ra8+ Kg7 39.Qd4+ f6 40.
Ra6 Qe5 41.Qb6 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "14"]
[White "Robatsch, Karl"]
[Black "Szabo, Laszlo"]
[WhiteElo "2460"]
[BlackElo "2525"]
[Result "1/2-1/2"]
[ECO "B70"]
[EventDate "1972.??.??"]
[PlyCount "25"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 g6 7.g4 Bg7 8.g5 Nfd7
9.Be3 Nc6 10.h4 h5 11.gxh6 Bxh6 12.Nxc6 bxc6 13.Qd4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Browne, Walter Shawn"]
[Black "Robatsch, Karl"]
[WhiteElo "2500"]
[BlackElo "2460"]
[Result "1/2-1/2"]
[ECO "B58"]
[EventDate "1972.??.??"]
[PlyCount "67"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 Nxd4 7.Qxd4 g6 8.e5 
dxe5 9.Bb5+ Bd7 10.Qxe5 Bg7 11.Bg5 Bxb5 12.Qxb5+ Qd7 13.Qxd7+ Kxd7 14.
O-O-O+ Kc6 15.Rhe1 Rhe8 16.Re3 h6 17.Bxf6 exf6 18.Red3 Re6 19.Rd7 f5 20.
Rxf7 Bxc3 21.bxc3 b6 22.Rdd7 a6 23.Rc7+ Kb5 24.c4+ Kb4 25.Kb2 Rd8 26.a3+ 
Ka5 27.Rfe7 Rxe7 28.Rxe7 Rd2 29.Re5+ b5 30.cxb5 axb5 31.Re6 g5 32.Rxh6 
Rxf2 33.g3 f4 34.g4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Enklaar, Bertus"]
[Black "Korchnoi, Viktor"]
[BlackElo "2670"]
[Result "0-1"]
[ECO "D91"]
[EventDate "1972.??.??"]
[PlyCount "92"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 Ne4 6.Bh4 c6 7.e3 Qa5 8.Qb3 dxc4
9.Bxc4 Nd6 10.O-O Nxc4 11.Qxc4 Be6 12.Qd3 Na6 13.a3 Rd8 14.b4 Qh5 15.Ne2 
Bf5 16.Qb3 Bg4 17.Nf4 Qf5 18.Qd3 Qxd3 19.Nxd3 Bxf3 20.gxf3 Bxd4 21.Rad1 
Bf6 22.Bxf6 exf6 23.f4 Ke7 24.Kg2 Rd5 25.Kf3 Rhd8 26.Ke2 Nc7 27.Nb2 Nb5 
28.Rxd5 Rxd5 29.Nc4 b6 30.Ra1 Rh5 31.Rh1 c5 32.h3 Nd6 33.Nd2 c4 34.Nf3 Rd5
35.h4 Rd3 36.Ra1 Ne4 37.Nd4 Nc3+ 38.Ke1 Kd6 39.a4 a6 40.Nf3 Nd5 41.Nd2 b5 
42.axb5 axb5 43.Ne4+ Kc7 44.Nc5 Nxb4 45.Nxd3 Nc2+ 46.Kd2 Nxa1 0-1

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Hartoch, Robert"]
[Black "Ree, Hans"]
[WhiteElo "2400"]
[BlackElo "2430"]
[Result "1/2-1/2"]
[ECO "A04"]
[EventDate "1972.??.??"]
[PlyCount "18"]

1.Nf3 c5 2.g3 g6 3.Bg2 Bg7 4.O-O Nc6 5.c3 Nf6 6.d4 cxd4 7.cxd4 d5 8.Ne5 
Nxe5 9.dxe5 Ne4 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Langeweg, Christian"]
[Black "Ivkov, Borislav"]
[WhiteElo "2425"]
[BlackElo "2560"]
[Result "1-0"]
[ECO "A04"]
[EventDate "1972.??.??"]
[PlyCount "63"]

1.Nf3 b5 2.c3 e6 3.Qb3 a6 4.d4 Bb7 5.Nbd2 Nf6 6.a4 b4 7.a5 Be7 8.e3 O-O 9.
Be2 c5 10.dxc5 Nc6 11.cxb4 Rb8 12.e4 Ba8 13.Qc3 Rxb4 14.O-O Nxe4 15.Nxe4 
Rxe4 16.Bxa6 Bf6 17.Qd2 Nd4 18.Nxd4 Bxd4 19.Be2 Qc7 20.h3 Rg4 21.Bxg4 Qg3 
22.Bf3 Bxf3 23.Qg5 Qxg5 24.Bxg5 Bd5 25.Rab1 Bxc5 26.b4 Bd4 27.b5 Rb8 28.
Be3 Bxe3 29.fxe3 Bc4 30.Rfc1 d5 31.a6 Kf8 32.a7 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Ljubojevic, Ljubomir"]
[Black "Padevsky, Nikola"]
[WhiteElo "2510"]
[BlackElo "2460"]
[Result "1/2-1/2"]
[ECO "C11"]
[EventDate "1972.??.??"]
[PlyCount "48"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bd3 c5 5.exd5 cxd4 6.Nb5 Nxd5 7.Nxd4 Bb4+ 8.
Bd2 Qg5 9.Bxb4 Nxb4 10.Ngf3 Nxd3+ 11.Qxd3 Qa5+ 12.c3 Nc6 13.Nxc6 bxc6 14.
Qd6 Bb7 15.O-O-O Rd8 16.Qxd8+ Qxd8 17.Rxd8+ Kxd8 18.Ne5 Kc7 19.Nxf7 Rf8 
20.Ng5 Rxf2 21.Nxe6+ Kb6 22.g3 g6 23.h3 Bc8 24.Nd4 h5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Szabo, Laszlo"]
[Black "Donner, Jan"]
[WhiteElo "2525"]
[BlackElo "2500"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1972.??.??"]
[PlyCount "121"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Nc6 7.e5 dxe5 8.dxe5 
Nd5 9.Bd2 Nxc3 10.Bxc3 Bf5 11.Bxf5 Qxd1+ 12.Rxd1 gxf5 13.h3 Rad8 14.Ke2 e6
15.g4 Rxd1 16.Rxd1 fxg4 17.hxg4 f6 18.exf6 Bxf6 19.Bxf6 Rxf6 20.Ke3 Rg6 
21.g5 Rg7 22.Ke4 Kf8 23.a3 a5 24.Rh1 Ke7 25.Rh6 Nd8 26.Nd4 c5 27.f5 Rxg5 
28.Nxe6 Nxe6 29.Rxe6+ Kf7 30.Rb6 h5 31.Rxb7+ Kf6 32.Rb6+ Kg7 33.Rc6 Rg4+ 
34.Kf3 Rc4 35.c3 h4 36.Rg6+ Kf7 37.Ra6 a4 38.Rg6 Ke7 39.Rc6 Kf7 40.Rh6 Kg7
41.Rc6 Kf7 42.Kg2 Re4 43.Rxc5 Re2+ 44.Kh3 Rxb2 45.Kxh4 Kf6 46.Kg4 Rg2+ 47.
Kf4 Rf2+ 48.Ke4 Re2+ 49.Kd4 Ra2 50.Kc4 Rxa3 51.Kb4 Ra1 52.Ra5 Rc1 53.c4 
Rc2 54.Rxa4 Kxf5 55.Ra1 Ke6 56.Rd1 Rb2+ 57.Ka5 Rb8 58.c5 Ke7 59.c6 Rd8 60.
Rxd8 Kxd8 61.Kb6 1-0

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Timman, Jan"]
[Black "Polugaevsky, Lev"]
[WhiteElo "2445"]
[BlackElo "2640"]
[Result "1/2-1/2"]
[ECO "E18"]
[EventDate "1972.??.??"]
[PlyCount "25"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Nxe4 
Bxe4 9.Ne1 Bxg2 10.Nxg2 d5 11.Qa4 Qd7 12.Qxd7 Nxd7 13.cxd5 1/2-1/2

[Event "12th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1972.??.??"]
[Round "15"]
[White "Uhlmann, Wolfgang"]
[Black "Malich, Burkhard"]
[WhiteElo "2570"]
[BlackElo "2450"]
[Result "1-0"]
[ECO "D59"]
[EventDate "1972.??.??"]
[PlyCount "79"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 d5 4.d4 Be7 5.Bg5 h6 6.Bh4 O-O 7.e3 b6 8.Rc1 Bb7 
9.cxd5 Nxd5 10.Nxd5 Bxd5 11.Bxe7 Qxe7 12.Bd3 c5 13.dxc5 bxc5 14.O-O Rc8 
15.Nd2 Nd7 16.Ba6 Rc7 17.Qe2 Rb8 18.b3 Ne5 19.Rc3 Nc6 20.e4 Nd4 21.Qh5 Bb7
22.Bc4 Rd8 23.Rfc1 Qg5 24.Qxg5 hxg5 25.f3 Nc6 26.Nf1 Nb4 27.Ra1 Ba6 28.
Bxa6 Nxa6 29.Kf2 Rcd7 30.Ke2 f6 31.Rc4 Rd4 32.Rac1 Rxc4 33.Rxc4 Rd6 34.Ra4
Kf7 35.Ne3 Ke8 36.e5 Rc6 37.h4 gxh4 38.exf6 gxf6 39.Rxh4 Rc7 40.Rh6 1-0

