[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "1"]
[White "Ribli, Zoltan"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo "2610"]
[BlackElo "2595"]
[ECO "D66"]
[EventDate "1980.06.26"]
[PlyCount "78"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 d5 4.d4 Be7 5.Bg5 O-O 6.e3 h6 7.Bh4 b6 8.Rc1 c6 9.
Bd3 Nbd7 10.O-O Bb7 11.Qe2 c5 12.Rfd1 cxd4 13.Nxd4 Rc8 14.Bg3 Nc5 15.Bb1 
Ba6 16.Ndb5 Qd7 17.Be5 Rfd8 18.cxd5 exd5 19.h3 Qe6 20.Bd4 Nce4 21.Qf3 Bxb5
22.Nxb5 Nd2 23.Qf5 Nxb1 24.Qxb1 Qd7 25.Rxc8 Qxc8 26.Nxa7 Qd7 27.Bxb6 Rb8 
28.Bd4 Rb7 29.Rc1 Rxa7 30.Bxa7 Qxa7 31.b4 g6 32.b5 Bc5 33.Qb3 d4 34.exd4 
Bxd4 35.Rc2 Qe7 36.Qd3 Qe1+ 37.Qf1 Qe4 38.Qe2 Qf4 39.Rc4 Nd5 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "1"]
[White "Larsen, Bent"]
[Black "Dolmatov, Sergei"]
[Result "0-1"]
[WhiteElo "2590"]
[BlackElo "2535"]
[ECO "D46"]
[EventDate "1980.06.26"]
[PlyCount "70"]

1.c4 c6 2.Nc3 d5 3.d4 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Be2 Bd6 7.O-O O-O 8.b3 Re8 
9.Bb2 dxc4 10.Bxc4 b5 11.Bd3 Bb7 12.Rc1 Rc8 13.a4 a6 14.Qe2 e5 15.dxe5 
Nxe5 16.Bf5 Rb8 17.Ne4 Nxf3+ 18.Qxf3 Nxe4 19.Bxe4 Qh4 20.Rfd1 Bxh2+ 21.Kf1
Qxe4 22.Qxe4 Rxe4 23.g3 Bxg3 24.fxg3 Rxe3 25.Rd7 h6 26.Rc3 Rxc3 27.Bxc3 c5
28.a5 Bc6 29.Ra7 b4 30.Be5 Re8 31.Bd6 Bb5+ 32.Kf2 Re2+ 33.Kf3 Rb2 34.Bxc5 
Rxb3+ 35.Kf4 Rb1 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "1"]
[White "Van der Wiel, John"]
[Black "Karpov, Anatoly"]
[Result "0-1"]
[WhiteElo "2465"]
[BlackElo "2725"]
[ECO "C54"]
[EventDate "1980.06.26"]
[PlyCount "128"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Bd2 Bxd2+ 8.
Nbxd2 d5 9.exd5 Nxd5 10.Qb3 Nce7 11.O-O O-O 12.Rfe1 c6 13.Ne4 h6 14.Ne5 
Qb6 15.Nd6 Qxb3 16.Bxb3 Rb8 17.Re2 Nf5 18.Nxf5 Bxf5 19.Bxd5 cxd5 20.g4 Bh7
21.Rae1 Rbd8 22.h4 f6 23.Nf3 g5 24.Re7 Rf7 25.hxg5 hxg5 26.Re8+ Rxe8 27.
Rxe8+ Kg7 28.Ne1 Rc7 29.f3 Kf7 30.Rb8 Ke6 31.Kf2 b6 32.Ra8 Bb1 33.a3 Ba2 
34.Ke3 Rh7 35.Re8+ Kd7 36.Rf8 Re7+ 37.Kd2 Ke6 38.Rh8 Rc7 39.Re8+ Kf7 40.
Ra8 Bb3 41.Nd3 Ba4 42.Rh8 Ke6 43.f4 Rc2+ 44.Ke3 Rg2 45.f5+ Kd6 46.Rh6 Rg3+
47.Kd2 Ke7 48.Nb4 Rxg4 49.Nxd5+ Kd6 50.Nxf6 Rxd4+ 51.Kc3 Rh4 52.Ne4+ Kd5 
53.Rxh4 gxh4 54.Ng5 Bd7 55.f6 Kd6 56.Kd4 h3 57.f7 Ke7 58.Nxh3 Bxh3 59.Ke5 
Bd7 60.f8=Q+ Kxf8 61.Kd6 Ba4 62.Kc7 Ke7 63.Kb7 Kd6 64.Kxa7 Kc5 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "1"]
[White "Timman, Jan"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2545"]
[ECO "B76"]
[EventDate "1980.06.26"]
[PlyCount "100"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 8.Qd2 
O-O 9.O-O-O Nxd4 10.Bxd4 Be6 11.Kb1 Qc7 12.h4 Rfc8 13.h5 Qa5 14.hxg6 hxg6 
15.a3 Rab8 16.Ne2 Qxd2 17.Rxd2 a6 18.Nf4 Bc4 19.Bxc4 Rxc4 20.Bxf6 Bxf6 21.
Nd5 Kg7 22.g4 Rg8 23.Rd3 Rc5 24.c3 g5 25.Rd2 Rc6 26.Rdh2 Kf8 27.Nxf6 exf6 
28.Rh8 Rxh8 29.Rxh8+ Ke7 30.Kc2 Rc5 31.Kd3 d5 32.Kd4 Rb5 33.b4 dxe4 34.c4 
Rb6 35.c5 Re6 36.fxe4 Kd7 37.a4 Kc7 38.b5 axb5 39.axb5 b6 40.cxb6+ Kxb6 
41.Rb8+ Kc7 42.Ra8 Rd6+ 43.Kc5 Re6 44.Kd4 Rd6+ 45.Ke3 Kb7 46.Ra4 Rd1 47.
Ra6 Rf1 48.Rd6 Rf4 49.Rc6 Rxg4 50.Rxf6 Rf4 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "2"]
[White "Karpov, Anatoly"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2725"]
[BlackElo "2600"]
[ECO "B08"]
[EventDate "1980.06.26"]
[PlyCount "52"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4 7.Be3 Nc6 8.Qd3 
Nd7 9.Ne1 Bxe2 10.Nxe2 e5 11.c3 Ne7 12.Nf3 exd4 13.Bxd4 Ne5 14.Bxe5 dxe5 
15.Qc4 c6 16.Rad1 Qc7 17.Rd3 Rad8 18.Rfd1 Nc8 19.Ng3 Bf6 20.Qc5 Rxd3 21.
Rxd3 Re8 22.Nf1 Re6 23.N1d2 Rd6 24.Rxd6 Qxd6 25.Qe3 Bd8 26.Kf1 b5 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "2"]
[White "Ribli, Zoltan"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2590"]
[ECO "E62"]
[EventDate "1980.06.26"]
[PlyCount "89"]

1.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.d4 O-O 5.g3 d6 6.Bg2 c6 7.O-O Bf5 8.b3 Ne4 
9.Bb2 Na6 10.Rc1 Rc8 11.Nh4 Nxc3 12.Bxc3 Bg4 13.h3 Bd7 14.Qd2 d5 15.cxd5 
cxd5 16.Bxd5 Bxh3 17.Bxb7 Rxc3 18.Rxc3 Bxf1 19.Kxf1 Qb6 20.Bxa6 Qxa6 21.
Nf3 Rd8 22.Rd3 Rc8 23.d5 Qd6 24.Kg2 Rc5 25.e4 Qc7 26.Qf4 Qxf4 27.gxf4 Bb2 
28.e5 Kf8 29.Ng5 h6 30.Ne4 Rc2 31.d6 exd6 32.Rxd6 Ke7 33.Kf3 g5 34.a4 gxf4
35.Kxf4 Rc1 36.Kf5 Rh1 37.Nf6 h5 38.Rd7+ Kf8 39.Rd8+ Kg7 40.Rg8+ Kh6 41.
Rh8+ Kg7 42.Rxh5 Rf1 43.Rg5+ Kh6 44.Ng4+ Kh7 45.Kf6 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "2"]
[White "Dolmatov, Sergei"]
[Black "Van der Wiel, John"]
[Result "1-0"]
[WhiteElo "2535"]
[BlackElo "2465"]
[ECO "B66"]
[EventDate "1980.06.26"]
[PlyCount "149"]

1.e4 c5 2.Nf3 Nc6 3.Nc3 d6 4.d4 cxd4 5.Nxd4 Nf6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
h6 9.Be3 Bd7 10.f3 Qc7 11.g4 Ne5 12.Bd3 b5 13.g5 hxg5 14.Bxg5 Nc4 15.Bxc4 
Qxc4 16.Kb1 b4 17.Nce2 a5 18.h4 Nh5 19.Nb3 e5 20.Nbc1 Be6 21.b3 Qc6 22.
Rhg1 f6 23.Be3 Rd8 24.c4 Rd7 25.Qc2 Be7 26.f4 Bf7 27.f5 Rg8 28.Rg4 Rd8 29.
Rdg1 Ra8 30.Nd3 g6 31.Nb2 Rc8 32.Qd3 g5 33.hxg5 fxg5 34.Bxg5 Rxg5 35.Rxg5 
Bxg5 36.Rxg5 Nf6 37.Ng3 Ke7 38.Qe3 Rh8 39.Nd3 Nh7 40.Rg7 Nf6 41.Qa7+ Qd7 
42.Qxa5 Kf8 43.Rg5 Nh7 44.Rg6 Bxg6 45.fxg6 Nf6 46.Nf5 Rh1+ 47.Nc1 Rg1 48.
Qa8+ Ne8 49.g7+ Kg8 50.Qd5+ Kh7 51.Qd2 Kg8 52.Qd5+ Kh7 53.Qd2 Kg8 54.Qh2 
Rxg7 55.Nxg7 Kxg7 56.Qg2+ Kf8 57.Nd3 Qb7 58.Qf2+ Kg8 59.Qe1 Qh7 60.Nxb4 
Nf6 61.Qg3+ Kf7 62.Qf3 Kg7 63.Kb2 Qh4 64.Nd5 Nxe4 65.Ne3 Qf4 66.Qxf4 exf4 
67.Nf1 Kf6 68.a4 Ke5 69.a5 Nc5 70.b4 Nd7 71.Kc3 Ke4 72.a6 Nb6 73.b5 Na8 
74.Nh2 Ke3 75.Ng4+ 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "2"]
[White "Hort, Vlastimil"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2545"]
[ECO "B32"]
[EventDate "1980.06.26"]
[PlyCount "62"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 a6 6.Nd6+ Bxd6 7.Qxd6 Qf6 8.
Qd2 Nge7 9.Nc3 d6 10.Bd3 Be6 11.O-O Rd8 12.Qg5 Qxg5 13.Bxg5 Nb4 14.Rfd1 f6
15.Be3 d5 16.Bb6 Rd7 17.exd5 Nexd5 18.Nxd5 Nxd5 19.Ba5 Kf7 20.c4 Ne7 21.
Be2 Nf5 22.Rxd7+ Bxd7 23.Bb6 Be6 24.Rd1 Rc8 25.b3 Rc6 26.Ba7 Rd6 27.Kf1 g5
28.Bh5+ Kg7 29.Bc5 Rc6 30.Bb4 Nd4 31.Bc3 Kh6 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "3"]
[White "Timman, Jan"]
[Black "Dolmatov, Sergei"]
[Result "1-0"]
[WhiteElo "2600"]
[BlackElo "2535"]
[ECO "D44"]
[EventDate "1980.06.26"]
[PlyCount "116"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.
Nxg5 hxg5 10.Bxg5 Nbd7 11.g3 Qa5 12.exf6 b4 13.Ne4 c3 14.bxc3 bxc3 15.Qd3 
Bb7 16.Be2 O-O-O 17.O-O Qf5 18.h4 c5 19.Nxc5 Nxc5 20.Qxf5 exf5 21.dxc5 
Bxc5 22.Rac1 Bb4 23.Bf4 Rhe8 24.Bc4 Re4 25.Bxf7 Rf8 26.Bg6 Rxf6 27.h5 Bc6 
28.Bg5 Rxg6 29.hxg6 Rg4 30.Bf6 Rxg6 31.Bxc3 Ba3 32.Rcd1 Bd6 33.Bd2 f4 34.
Rc1 Bc7 35.Rxc6 Rxc6 36.Bxf4 Bxf4 37.gxf4 Kd7 38.Rd1+ Ke6 39.Rd4 Kf5 40.
Kg2 Ra6 41.a4 Kg4 42.Rb4 Re6 43.f5+ Kxf5 44.Kf3 a6 45.Rf4+ Kg5 46.Rg4+ Kf5
47.Rf4+ Kg5 48.Rg4+ Kf5 49.Rh4 Kg5 50.Kg3 Re1 51.Rc4 Re6 52.Rc5+ Kf6 53.
Ra5 Rc6 54.Kg4 Kf7 55.f4 Rg6+ 56.Rg5 Rc6 57.Rf5+ Ke7 58.Kg5 Rc4 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "3"]
[White "Sosonko, Gennadi"]
[Black "Karpov, Anatoly"]
[Result "1/2-1/2"]
[WhiteElo "2545"]
[BlackElo "2725"]
[ECO "E06"]
[EventDate "1980.06.26"]
[PlyCount "23"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.Qb3 c5 7.O-O Nc6 8.cxd5 
Qxd5 9.Qxd5 Nxd5 10.dxc5 Bxc5 11.Bd2 Rd8 12.Nc3 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "3"]
[White "Larsen, Bent"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2590"]
[BlackElo "2595"]
[ECO "A16"]
[EventDate "1980.06.26"]
[PlyCount "82"]

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6 6.d3 Bg7 7.Be3 O-O 8.Qd2 
N8d7 9.Nf3 Nf6 10.Bh6 a5 11.O-O c6 12.Bxg7 Kxg7 13.Rab1 Nbd5 14.e4 Nb6 15.
h3 h6 16.Qe3 Ra6 17.Rbd1 a4 18.Rfe1 Ra5 19.d4 Be6 20.Ne5 Nc4 21.Nxc4 Bxc4 
22.d5 Qc7 23.dxc6 bxc6 24.Rd4 Be6 25.Rxa4 Rxa4 26.Nxa4 Bxa2 27.b3 Rb8 28.
Nc5 Qe5 29.Bf1 Rd8 30.Qc1 Bb1 31.Qc4 Ba2 32.Qc2 Qd4 33.e5 Nd5 34.Nd3 Nb4 
35.Nxb4 Qxb4 36.Re3 Rd2 37.Qc1 Qd4 38.e6 Bxb3 39.exf7 Bxf7 40.Qxc6 Qf6 41.
Qxf6+ Kxf6 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "3"]
[White "Van der Wiel, John"]
[Black "Ribli, Zoltan"]
[Result "1-0"]
[WhiteElo "2465"]
[BlackElo "2610"]
[ECO "B93"]
[EventDate "1980.06.26"]
[PlyCount "58"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Nbd7 8.a4 Be7
9.Bc4 O-O 10.O-O Qb6+ 11.Kh1 exf4 12.Bd5 Ng4 13.Nd4 Ne3 14.Bxe3 fxe3 15.
Rxf7 Rxf7 16.Bxf7+ Kxf7 17.Qh5+ Kg8 18.Qe8+ Bf8 19.Nd5 Qxd4 20.Ne7+ Kh8 
21.Rf1 Qf6 22.Rxf6 gxf6 23.Kg1 Kg7 24.Nf5+ Kg8 25.Nxd6 Kg7 26.Qf7+ Kh8 27.
Ne8 h6 28.Nc7 Bc5 29.Kf1 Nf8 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "4"]
[White "Hort, Vlastimil"]
[Black "Karpov, Anatoly"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2725"]
[ECO "A25"]
[EventDate "1980.06.26"]
[PlyCount "35"]

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Rb1 a5 6.a3 Nh6 7.d3 O-O 8.Nf3 d6 9.
h4 Ng4 10.h5 h6 11.hxg6 fxg6 12.Ne4 g5 13.b4 axb4 14.axb4 Ne7 15.b5 Be6 
16.Bb2 Qd7 17.Ra1 c6 18.bxc6 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "4"]
[White "Ribli, Zoltan"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2610"]
[BlackElo "2600"]
[ECO "E18"]
[EventDate "1980.06.26"]
[PlyCount "65"]

1.Nf3 Nf6 2.c4 b6 3.g3 Bb7 4.Bg2 e6 5.O-O Be7 6.Nc3 O-O 7.d4 Ne4 8.Bd2 Bf6
9.Rc1 c5 10.Ne1 Nd6 11.Bxb7 Nxb7 12.d5 exd5 13.cxd5 d6 14.Nd3 Re8 15.b4 
Na6 16.a3 Qd7 17.Re1 Rac8 18.Kg2 b5 19.f3 cxb4 20.axb4 Rc4 21.Ne4 Bd4 22.
Qb3 Rec8 23.e3 Bb6 24.Nf4 Qe7 25.h4 Nb8 26.Rxc4 Rxc4 27.Rc1 Rxc1 28.Bxc1 
Qc7 29.Bb2 Nd7 30.Kf2 Ne5 31.Bxe5 dxe5 32.Nd3 Nd6 33.Nxd6 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "4"]
[White "Larsen, Bent"]
[Black "Van der Wiel, John"]
[Result "1-0"]
[WhiteElo "2590"]
[BlackElo "2465"]
[ECO "A34"]
[EventDate "1980.06.26"]
[PlyCount "77"]

1.c4 Nf6 2.Nc3 c5 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7 6.Qb3 Nc6 7.Bxc6+ bxc6 8.
Qa4 Qd7 9.Nf3 Nb5 10.d3 f6 11.Be3 e5 12.Rc1 Nd4 13.Ne4 Rb8 14.Nxc5 Bxc5 
15.Rxc5 Rxb2 16.Bxd4 Rb1+ 17.Kd2 Rxh1 18.Nxe5 fxe5 19.Rxe5+ Kd8 20.Bc5 
Rxh2 21.Bb4 Bb7 22.Qxa7 Rxf2 23.Qxf2 Re8 24.Rxe8+ Qxe8 25.a4 Qg8 26.Qb6+ 
Kc8 27.Bd6 Qd8 28.Qc5 Kd7 29.Bf4 Ke6 30.Qb4 Qe7 31.Qc4+ Kf5 32.g4+ Kf6 33.
a5 Qe6 34.g5+ Kf7 35.Kc3 c5 36.Qxe6+ Kxe6 37.Kc4 Bg2 38.a6 Kd7 39.Kxc5 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "4"]
[White "Dolmatov, Sergei"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2545"]
[ECO "B32"]
[EventDate "1980.06.26"]
[PlyCount "51"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 a6 6.Nd6+ Bxd6 7.Qxd6 Qf6 8.
Qxf6 Nxf6 9.Nc3 Nb4 10.Bd3 d5 11.exd5 Nfxd5 12.Nxd5 Nxd5 13.Bd2 Be6 14.O-O
f6 15.Rad1 Kf7 16.c4 Ne7 17.b3 Bf5 18.Ba5 b5 19.Be2 Be6 20.Bf3 Rac8 21.
cxb5 axb5 22.Rd2 h5 23.Ra1 Bg4 24.Bxg4 hxg4 25.a4 Ke6 26.axb5 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "5"]
[White "Van der Wiel, John"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2465"]
[BlackElo "2595"]
[ECO "B17"]
[EventDate "1980.06.26"]
[PlyCount "31"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5 Be6 8.
Be2 g6 9.O-O Bg7 10.b3 Nd7 11.Nf3 Bg4 12.Bb2 O-O 13.Re1 Qc7 14.c4 Rad8 15.
Qc2 Bf5 16.Qc3 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "5"]
[White "Timman, Jan"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2590"]
[ECO "B19"]
[EventDate "1980.06.26"]
[PlyCount "83"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 Bh7
9.Bd3 Bxd3 10.Qxd3 Ngf6 11.Bf4 e6 12.O-O-O Qa5 13.Kb1 Be7 14.Ne5 Rd8 15.
Nc4 Qb5 16.Bc7 Rc8 17.Nd6+ Bxd6 18.Bxd6 Qxd3 19.Rxd3 Nb6 20.Bc5 Kd7 21.Rh4
Kc7 22.Ne4 Nxe4 23.Rxe4 Nd7 24.Rg4 Rh7 25.Rdg3 Rg8 26.c4 b6 27.Be7 g5 28.
hxg6 Rxg6 29.Bh4 Nf8 30.Rxg6 Nxg6 31.Bf6 h5 32.Kc2 a6 33.Rh3 Nf8 34.Kd3 b5
35.c5 Nd7 36.Be5+ Kd8 37.Ke4 a5 38.Rg3 Nxe5 39.dxe5 h4 40.Rd3+ Kc7 41.Rh3 
Rg7 42.Rxh4 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "5"]
[White "Karpov, Anatoly"]
[Black "Dolmatov, Sergei"]
[Result "1-0"]
[WhiteElo "2725"]
[BlackElo "2535"]
[ECO "B33"]
[EventDate "1980.06.26"]
[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 O-O 12.Nc2 Rb8 13.Be2 Bg5 14.O-O Be6 15.
Qd3 Qd7 16.Qg3 f6 17.Rfd1 a5 18.Na3 Na7 19.h3 Kh8 20.Bg4 Rfc8 21.Bxe6 Qxe6
22.Qd3 Rc5 23.Nc2 g6 24.b4 axb4 25.Ncxb4 Rb7 26.a4 bxa4 27.Rxa4 f5 28.Ra6 
Nc8 29.Ra8 Kg7 30.Qe2 fxe4 31.Qxe4 Qf5 32.Qe2 Rf7 33.c4 Bh4 34.Rf1 Ne7 35.
Ra6 Qd7 36.Qe4 Nxd5 37.Nxd5 Be7 38.Rfa1 Bf8 39.Qe2 Rc6 40.R6a3 Rc5 41.Rf3 
Rxf3 42.Qxf3 Qf7 43.Qg4 h5 44.Qe4 Rc8 45.Ra3 Qf5 46.Ra7+ Kh6 47.Qe3+ g5 
48.Qe2 Rb8 49.g4 hxg4 50.hxg4 Qb1+ 51.Kg2 Rb7 52.Rxb7 Qxb7 53.Qf3 Qc8 54.
Qf6+ Kh7 55.Qf7+ 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "5"]
[White "Sosonko, Gennadi"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]
[WhiteElo "2545"]
[BlackElo "2610"]
[ECO "E15"]
[EventDate "1980.06.26"]
[PlyCount "28"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Nbd2 Bb7 6.Bg2 c5 7.O-O Be7 8.b3 O-O 
9.Bb2 d6 10.Re1 cxd4 11.Nxd4 Bxg2 12.Kxg2 Qc7 13.e4 Nc6 14.Nxc6 Qxc6 
1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "6"]
[White "Van der Wiel, John"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2465"]
[BlackElo "2600"]
[ECO "C57"]
[EventDate "1980.06.26"]
[PlyCount "80"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4 6.c3 b5 7.Bf1 Nxd5 8.cxd4 
Qxg5 9.Nc3 exd4 10.Bxb5+ Bd7 11.Bxd7+ Kxd7 12.O-O Nf4 13.g3 Nh3+ 14.Kg2 
Nf4+ 15.Kh1 dxc3 16.Qa4+ c6 17.gxf4 Qd5+ 18.Kg1 cxb2 19.Bxb2 Bc5 20.Rae1 
f6 21.Ba3 Rhe8 22.Bxc5 Qxc5 23.Re3 Rab8 24.Rc3 Rb4 25.Qc2 Qb5 26.Qxh7 Re7 
27.Qh3+ f5 28.Rd3+ Kc7 29.Re3 Rbe4 30.Rxe4 Rxe4 31.Qg3 Qb2 32.d3 Re6 33.
Qg5 g6 34.Qh4 Qxa2 35.Qh7+ Kd6 36.Qg7 Qa4 37.Ra1 Qxf4 38.Qf8+ Kc7 39.Qf7+ 
Kd6 40.Qf8+ Kc7 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "6"]
[White "Hort, Vlastimil"]
[Black "Dolmatov, Sergei"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2535"]
[ECO "B14"]
[EventDate "1980.06.26"]
[PlyCount "119"]

1.c4 c6 2.e4 d5 3.exd5 cxd5 4.d4 Nf6 5.Nc3 g6 6.Qb3 Bg7 7.cxd5 O-O 8.Be2 
Nbd7 9.Bf3 Nb6 10.Nge2 Bf5 11.O-O Bd3 12.d6 exd6 13.Bxb7 Rb8 14.Bf3 Re8 
15.Qd1 Ba6 16.Re1 Rc8 17.Ng3 Rxe1+ 18.Qxe1 Qd7 19.Bf4 Re8 20.Qd2 Re6 21.b3
d5 22.Re1 Rc6 23.Be5 Bf8 24.Nce2 Ne8 25.h3 f6 26.Bf4 h5 27.h4 Bb7 28.Be3 
Qf7 29.Nf4 Nd6 30.Nd3 Rc8 31.Bh6 Nd7 32.Bxf8 Nxf8 33.Qf4 Rd8 34.Nc5 Bc6 
35.a4 Kg7 36.Re3 Ne4 37.Ncxe4 dxe4 38.Bxe4 Ne6 39.Qf3 Nxd4 40.Qd1 Ne6 41.
Qc2 Nd4 42.Qc3 Bxe4 43.Nxe4 Nf5 44.Re1 Re8 45.Kh2 Re7 46.Ng3 Rxe1 47.Nxf5+
gxf5 48.Qxe1 Qxb3 49.Qe7+ Kg6 50.Qe8+ Kg7 51.Qe7+ Kg6 52.Qe8+ Kg7 53.Qd7+ 
Kg6 54.Qxa7 Qc4 55.a5 Qxh4+ 56.Kg1 Qc4 57.a6 h4 58.Qb6 Qc1+ 59.Kh2 Qf4+ 
60.g3 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "6"]
[White "Ribli, Zoltan"]
[Black "Karpov, Anatoly"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2725"]
[ECO "E05"]
[EventDate "1980.06.26"]
[PlyCount "109"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O dxc4 7.Qc2 a6 8.Qxc4 b5
9.Qc2 Bb7 10.Bf4 Nd5 11.Nc3 Nxf4 12.gxf4 Nd7 13.Rfd1 Qc8 14.Ne4 c5 15.dxc5
Nxc5 16.Nxc5 Qxc5 17.Qxc5 Bxc5 18.Rac1 Rfc8 19.Ne5 Bxg2 20.Kxg2 f6 21.Nf3 
Bf8 22.e3 g6 23.b3 Bb4 24.h3 Kf8 25.Nd4 Kf7 26.a4 bxa4 27.bxa4 Bc5 28.Rc4 
Ba3 29.Rxc8 Rxc8 30.Rb1 Rc4 31.Rb7+ Be7 32.Ra7 e5 33.fxe5 fxe5 34.Nf3 Rxa4
35.Nxe5+ Kf6 36.Nc6 Bc5 37.Rxh7 Ra2 38.Kf3 a5 39.h4 a4 40.Ke4 Bf8 41.Ra7 
Bd6 42.f4 Rh2 43.Ra6 Kf7 44.Ne5+ Bxe5 45.Kxe5 Kg7 46.Ra7+ Kh6 47.Rxa4 Rxh4
48.Kf6 Rh5 49.e4 Rh4 50.e5 Rh5 51.e6 Rf5+ 52.Ke7 Kg7 53.Kd6 Rf8 54.Ra7+ 
Kf6 55.Rd7 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "6"]
[White "Larsen, Bent"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2590"]
[BlackElo "2545"]
[ECO "E42"]
[EventDate "1980.06.26"]
[PlyCount "108"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.a3 Be7 8.Nf4 d5
9.cxd5 Nxd5 10.Ncxd5 exd5 11.Be2 Nc6 12.O-O Bg5 13.Bf3 Bxf4 14.Bxf4 Be6 
15.Qd2 Qb6 16.Rad1 Rfc8 17.Rfe1 Na5 18.Qb4 Qxb4 19.axb4 Nc4 20.Re2 Rc6 21.
h3 h6 22.g4 a6 23.Rd3 Rb6 24.b3 Na3 25.Ra2 Nb5 26.Rc2 Na7 27.Rc5 Nc6 28.
Bd2 Rd8 29.b5 Rxb5 30.Rxb5 axb5 31.Be2 Ra8 32.f4 f5 33.Kf2 Ra2 34.Ke3 b4 
35.g5 Kf7 36.h4 Ra1 37.Bf3 Rb1 38.h5 Ke7 39.Kf2 Kd6 40.Be1 Rb2+ 41.Ke3 Bf7
42.Bd1 Rh2 43.g6 Be8 44.Be2 Ke6 45.Rd1 Rh3+ 46.Bf3 Rh2 47.Rc1 Rb2 48.Bd1 
Ra2 49.Bc2 Bd7 50.Kd3 Kd6 51.Bd2 Be6 52.Bd1 Kd7 53.Be3 Kd6 54.Bd2 Kd7 
1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "7"]
[White "Dolmatov, Sergei"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[WhiteElo "2535"]
[BlackElo "2610"]
[ECO "B93"]
[EventDate "1980.06.26"]
[PlyCount "80"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nb3 Nbd7 8.a4 Be7
9.Be2 b6 10.O-O Bb7 11.Bd3 O-O 12.Qe2 Re8 13.f5 d5 14.Kh1 dxe4 15.Nxe4 Qc7
16.Bd2 Bxe4 17.Bxe4 Nxe4 18.Qxe4 Nf6 19.Qd3 e4 20.Qc3 Qb7 21.Qg3 Rad8 22.
Bc3 Bd6 23.Qh4 Be5 24.Bxe5 Rxe5 25.c3 b5 26.Nd4 bxa4 27.Rf2 Qd7 28.Re2 h6 
29.Qe1 Rc5 30.Qb1 Rc4 31.Qd1 Qc7 32.Re1 h5 33.Kg1 Ng4 34.g3 Qb6 35.Qe2 
Rdxd4 36.cxd4 Rxd4 37.Kg2 e3 38.Red1 Qc6+ 39.Kg1 Nf2 40.h4 Qh1# 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "7"]
[White "Karpov, Anatoly"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2725"]
[BlackElo "2590"]
[ECO "B19"]
[EventDate "1980.06.26"]
[PlyCount "71"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 Bh7
9.Bd3 Bxd3 10.Qxd3 e6 11.Bf4 Ngf6 12.O-O-O Be7 13.c4 a5 14.Kb1 a4 15.Ne5 
Nxe5 16.Bxe5 Qa5 17.Ne4 O-O-O 18.c5 Nxe4 19.Qxe4 Bf6 20.Bxf6 gxf6 21.Qf4 
f5 22.Rd3 Rd5 23.Rhd1 Qc7 24.Qd2 f4 25.Ra3 Rg8 26.f3 Rdg5 27.Rg1 Rxh5 28.
Rxa4 Qb8 29.Re1 Rh2 30.Re2 Rh1+ 31.Kc2 h5 32.Qd3 Kd7 33.Rb4 Rg1 34.d5 cxd5
35.c6+ Kxc6 36.Qb5+ 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "7"]
[White "Timman, Jan"]
[Black "Hort, Vlastimil"]
[Result "1-0"]
[WhiteElo "2600"]
[BlackElo "2595"]
[ECO "D52"]
[EventDate "1980.06.26"]
[PlyCount "116"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 dxc4 8.Bxf6 
Nxf6 9.Nxc4 Qc7 10.Be2 Be7 11.a3 Nd5 12.Rc1 O-O 13.O-O Bd7 14.b4 Rfc8 15.
Qb3 Qd8 16.Rfd1 Be8 17.Bf3 Rc7 18.Ne2 Bf8 19.g3 Qe7 20.Rc2 Rd8 21.Nc1 Nb6 
22.Nd3 Nxc4 23.Rxc4 f6 24.Rc3 Kh8 25.Be4 Qd6 26.Nc5 Re7 27.Qc2 h6 28.Bf3 
Qb8 29.Bg4 Rd6 30.Nd3 Qd8 31.Nf4 g5 32.Nd3 Kg7 33.Qe2 Bg6 34.Nc5 Qe8 35.
Bf3 a6 36.Rdc1 Qf7 37.a4 h5 38.b5 axb5 39.axb5 e5 40.dxe5 Rxe5 41.bxc6 
bxc6 42.Qb2 Re7 43.Rb3 Kh7 44.Nb7 Rd2 45.Qxd2 Qxb3 46.Na5 Qf7 47.Nxc6 Rd7 
48.Nd4 f5 49.Rc8 Bg7 50.Bc6 Rd6 51.Be8 Qb7 52.Qc2 Qd5 53.Bxg6+ Kxg6 54.Rc5
Qe4 55.Qxe4 fxe4 56.Nf5 Rd1+ 57.Kg2 Bf6 58.g4 hxg4 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "7"]
[White "Sosonko, Gennadi"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[WhiteElo "2545"]
[BlackElo "2465"]
[ECO "E15"]
[EventDate "1980.06.26"]
[PlyCount "31"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Nbd2 Bb7 6.Bg2 c5 7.O-O cxd4 8.Nxd4 
Bxg2 9.Kxg2 Be7 10.e4 Nc6 11.Nxc6 dxc6 12.Qf3 Qc7 13.Nb3 Nd7 14.Bf4 e5 15.
Be3 O-O 16.Rfd1 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "8"]
[White "Sosonko, Gennadi"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2545"]
[BlackElo "2600"]
[ECO "A60"]
[EventDate "1980.06.26"]
[PlyCount "70"]

1.d4 e6 2.c4 Nf6 3.g3 c5 4.d5 exd5 5.cxd5 b5 6.e4 Nxe4 7.Qe2 Qe7 8.Bg2 f5 
9.Nc3 Nxc3 10.bxc3 Qxe2+ 11.Nxe2 Na6 12.O-O Rb8 13.Bf4 d6 14.Bd2 Be7 15.
Nf4 Kf7 16.Rfe1 Bf6 17.Rab1 Nc7 18.a4 a6 19.Nh5 Be5 20.f4 Bf6 21.Nxf6 Kxf6
22.c4 Rb7 23.Ba5 b4 24.Bxc7 Rxc7 25.a5 Bd7 26.Bf1 Re8 27.Rxe8 Bxe8 28.Bd3 
Rb7 29.Bc2 g5 30.Kf2 gxf4 31.gxf4 Rg7 32.Re1 Bd7 33.Bd1 Rg8 34.Re3 Re8 35.
Rxe8 Bxe8 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "8"]
[White "Dolmatov, Sergei"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2535"]
[BlackElo "2590"]
[ECO "E54"]
[EventDate "1980.06.26"]
[PlyCount "59"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Bb4 7.Bd3 dxc4 8.Bxc4 
O-O 9.O-O a6 10.a3 Be7 11.Ba2 b5 12.d5 exd5 13.Nxd5 Bb7 14.Nxe7+ Qxe7 15.
Bg5 Nbd7 16.Re1 Qc5 17.Be3 Qf5 18.Nh4 Qe4 19.Bg5 Qc6 20.Rc1 Qb6 21.Be3 Qd8
22.Nf5 Be4 23.Nd6 Bg6 24.Qd4 Qb8 25.f4 Rd8 26.f5 Bh5 27.h3 Nb6 28.Qxb6 
Qxb6 29.Bxb6 Rxd6 30.Be3 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "8"]
[White "Hort, Vlastimil"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2610"]
[ECO "B85"]
[EventDate "1980.06.26"]
[PlyCount "47"]

1.e4 c5 2.Nc3 d6 3.Nge2 e6 4.d4 cxd4 5.Nxd4 a6 6.Be2 Nf6 7.f4 Be7 8.Bf3 
O-O 9.O-O Qc7 10.Qe2 Nc6 11.Nb3 b5 12.a3 Bb7 13.Be3 Rac8 14.Qf2 Rfe8 15.
Rfd1 Ba8 16.Rd2 Qb8 17.g4 b4 18.axb4 Nxb4 19.Ba7 Qb7 20.Na5 Qc7 21.Bb6 Qb8
22.Ba7 Qc7 23.Bb6 Qb8 24.Ba7 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "8"]
[White "Karpov, Anatoly"]
[Black "Van der Wiel, John"]
[Result "1-0"]
[WhiteElo "2725"]
[BlackElo "2465"]
[ECO "B66"]
[EventDate "1980.06.26"]
[PlyCount "63"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
h6 9.Be3 Bd7 10.f3 Qc7 11.g4 Ne5 12.h4 b5 13.Rg1 h5 14.g5 Ng8 15.Be2 Rb8 
16.f4 b4 17.Nb1 Ng4 18.Bxa6 g6 19.Rgf1 Nxe3 20.Qxe3 Ne7 21.f5 gxf5 22.exf5
e5 23.f6 exd4 24.Rxd4 Be6 25.fxe7 Bg7 26.Re4 Qa5 27.Rxe6 Qxa6 28.Rxf7 Kxf7
29.e8=Q+ Rbxe8 30.g6+ Kg8 31.Rxe8+ Bf8 32.Qe6+ 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "9"]
[White "Van der Wiel, John"]
[Black "Dolmatov, Sergei"]
[Result "1/2-1/2"]
[WhiteElo "2465"]
[BlackElo "2535"]
[ECO "C19"]
[EventDate "1980.06.26"]
[PlyCount "86"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.a4 Qa5 8.Bd2 
Nbc6 9.Nf3 Bd7 10.g3 f6 11.Bh3 O-O-O 12.O-O f5 13.Re1 c4 14.Bg2 h6 15.h4 
Rdg8 16.Qc1 Be8 17.Qa3 Qc7 18.Bc1 Bh5 19.Rb1 Nd8 20.a5 a6 21.Rb6 Bxf3 22.
Bxf3 g5 23.h5 Kb8 24.Qa1 Nc8 25.Ba3 Ka8 26.Bd6 Qd7 27.Reb1 Nxb6 28.axb6 
Nf7 29.Bc7 Rc8 30.g4 f4 31.Qa5 Qc6 32.Ra1 Rxc7 33.bxc7 Rc8 34.Rb1 Qxc7 35.
Qa3 Rh8 36.Rb5 Nd8 37.Bxd5 exd5 38.Rxd5 Qc8 39.f3 Qc6 40.Rc5 Qxf3 41.Rc8+ 
Ka7 42.Qc5+ b6 43.Qc7+ Qb7 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "9"]
[White "Sosonko, Gennadi"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2545"]
[BlackElo "2595"]
[ECO "A62"]
[EventDate "1980.06.26"]
[PlyCount "42"]

1.d4 Nf6 2.c4 e6 3.g3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.Bg2 Bg7 8.Nf3 O-O 
9.O-O Qe7 10.Re1 Nbd7 11.e4 Ng4 12.Nh4 Nb6 13.h3 Nf6 14.f4 Nfd7 15.Nf3 a6 
16.Kh2 Re8 17.a4 Nc4 18.Qc2 Qd8 19.Bf1 Na5 20.b3 Nb6 21.Bb2 c4 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "9"]
[White "Larsen, Bent"]
[Black "Ribli, Zoltan"]
[Result "1-0"]
[WhiteElo "2590"]
[BlackElo "2610"]
[ECO "E05"]
[EventDate "1980.06.26"]
[PlyCount "95"]

1.g3 d5 2.Bg2 Nf6 3.Nf3 e6 4.O-O Be7 5.c4 O-O 6.d4 dxc4 7.Qc2 a6 8.Qxc4 b5
9.Qc2 Bb7 10.Bg5 Nbd7 11.Nbd2 Rc8 12.Nb3 Be4 13.Qc1 c5 14.dxc5 Nxc5 15.
Nxc5 Rxc5 16.Qe3 Qa8 17.Bxf6 gxf6 18.Rfd1 Rd5 19.Ne1 Bxg2 20.Nxg2 Rfd8 21.
Qb3 a5 22.Rxd5 Qxd5 23.Nf4 Qc6 24.a4 b4 25.Rd1 Rc8 26.Rd3 Kf8 27.Qd1 f5 
28.b3 Ke8 29.Ng2 Bc5 30.Ne1 Bb6 31.Nf3 Qc5 32.Qf1 Qc2 33.e3 Kf8 34.Ne5 Bc7
35.Nf3 Bb6 36.Rd6 Bc5 37.Rd7 Qxb3 38.Qa6 Re8 39.Qxa5 Be7 40.Qe5 Kg8 41.Qb5
Qa2 42.Kg2 Kf8 43.Nd4 Bg5 44.Qe5 Kg8 45.Nxf5 f6 46.Qc7 exf5 47.Rxh7 Qd5+ 
48.Kh3 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "9"]
[White "Timman, Jan"]
[Black "Karpov, Anatoly"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2725"]
[ECO "E19"]
[EventDate "1980.06.26"]
[PlyCount "67"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 
Nxc3 9.Qxc3 c5 10.Rd1 d6 11.b3 Qc7 12.Bb2 Bf6 13.Qd2 Rd8 14.dxc5 dxc5 15.
Qf4 Na6 16.Qxc7 Nxc7 17.Ne5 Bxg2 18.Kxg2 Bxe5 19.Bxe5 Ne8 20.f4 f6 21.Bc3 
Kf7 22.g4 Rxd1 23.Rxd1 Ke7 24.Kf3 Rd8 25.Rd3 Nd6 26.e4 Nf7 27.Rxd8 Kxd8 
28.h4 Ke7 29.g5 fxg5 30.hxg5 g6 31.Ke3 Kd7 32.Bf6 Nd6 33.Be5 Nf7 34.Bf6 
1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "10"]
[White "Dolmatov, Sergei"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2600"]
[ECO "C55"]
[EventDate "1980.06.26"]
[PlyCount "98"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Be7 5.Bb3 O-O 6.O-O d6 7.c3 Na5 8.Bc2 c5 
9.Nbd2 Nc6 10.Re1 Qc7 11.Nf1 Be6 12.Ng3 d5 13.h3 Rad8 14.Qe2 d4 15.c4 g6 
16.Bh6 Rfe8 17.Qd2 Bf8 18.Bxf8 Rxf8 19.Qh6 Nb4 20.Rec1 Rfe8 21.Ng5 Qd6 22.
a3 Nxc2 23.Rxc2 Bd7 24.b4 Qf8 25.Qxf8+ Kxf8 26.Nf3 Rc8 27.Nd2 Ke7 28.Rf1 
b6 29.Ne2 Be6 30.f4 exf4 31.Nxf4 Nd7 32.Rb2 g5 33.Nd5+ Kd6 34.Nf6 Nxf6 35.
Rxf6 h5 36.Nf1 Ke5 37.Rff2 b5 38.Nd2 bxc4 39.Nxc4+ Bxc4 40.Rf5+ Kd6 41.
dxc4 Rxe4 42.Rd5+ Ke6 43.bxc5 d3 44.Rb7 f6 45.Rxa7 Rxc4 46.Rd6+ Kf5 47.Rf7
Rc3 48.Rfxf6+ Ke5 49.Rfe6+ Kf5 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "10"]
[White "Karpov, Anatoly"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2725"]
[BlackElo "2545"]
[ECO "B17"]
[EventDate "1980.06.26"]
[PlyCount "76"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5 Nd7 8.
Nd3 g6 9.c3 Bg7 10.Bf4 Qa5 11.Qd2 O-O 12.Be2 e5 13.dxe5 Nxe5 14.Nxe5 Bxe5 
15.Bg5 Be6 16.O-O Bg7 17.Bf3 Rfe8 18.Rfe1 Qb6 19.h3 a5 20.a3 a4 21.Re4 Ra5
22.Rae1 h5 23.Rb4 Qc7 24.Bf4 Qc8 25.Rbe4 Rd8 26.Qe3 Bf6 27.Rb4 Be7 28.Be4 
Kh7 29.Rd4 Rxd4 30.Qxd4 Qd8 31.Qe3 Bg5 32.Bc2 Bxf4 33.Qxf4 Qg5 34.Re4 Qxf4
35.Rxf4 Rd5 36.Rd4 b5 37.Be4 Rxd4 38.cxd4 Bd5 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "10"]
[White "Hort, Vlastimil"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2595"]
[BlackElo "2590"]
[ECO "A41"]
[EventDate "1980.06.26"]
[PlyCount "71"]

1.c4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 Bg4 5.e3 Nd7 6.Be2 c5 7.h3 Bxf3 8.Bxf3 Rb8
9.d5 a6 10.a4 h5 11.g3 Qa5 12.Ra3 Ngf6 13.Bd2 O-O 14.g4 hxg4 15.hxg4 Rfe8 
16.Be2 Qd8 17.g5 Nh7 18.f4 Nhf8 19.Bd3 e5 20.dxe6 fxe6 21.Qc2 Kf7 22.Rb3 
Nb6 23.a5 Nc8 24.Ne4 d5 25.cxd5 exd5 26.Nxc5 Nd6 27.Rb6 Re7 28.b4 Rc7 29.
Qb3 Nc8 30.Be4 Nxb6 31.axb6 Re7 32.Bxd5+ Ke8 33.Qa4+ Nd7 34.Be6 Qxb6 35.
Bxd7+ Kf8 36.Qb3 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "10"]
[White "Ribli, Zoltan"]
[Black "Van der Wiel, John"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2465"]
[ECO "E69"]
[EventDate "1980.06.26"]
[PlyCount "57"]

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nc3 O-O 6.O-O e5 7.d4 Nbd7 8.e4 exd4
9.Nxd4 Nc5 10.h3 Re8 11.Re1 a5 12.Rb1 Nfd7 13.Be3 c6 14.b3 Nf8 15.Qd2 Be6 
16.f4 Qd7 17.Kh2 Rad8 18.Rbd1 f5 19.Nxe6 Qxe6 20.Bd4 fxe4 21.Nxe4 Qf5 22.
Bxc5 dxc5 23.Qxd8 Rxd8 24.Rxd8 Qe6 25.Re8 Qf5 26.h4 h6 27.Bh3 Qh5 28.Kg2 
Kh8 29.Rxf8+ {29... f8 30. f6} 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "11"]
[White "Karpov, Anatoly"]
[Black "Hort, Vlastimil"]
[Result "1-0"]
[WhiteElo "2725"]
[BlackElo "2595"]
[ECO "C43"]
[EventDate "1980.06.26"]
[PlyCount "65"]

1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Nd7 6.Qe2 Qe7 7.Bxe4 dxe4 8.
Bf4 Nxe5 9.Bxe5 Bf5 10.Nc3 O-O-O 11.O-O-O Qe6 12.Qe3 h5 13.h3 f6 14.Bh2 g6
15.Kb1 Bh6 16.Qg3 Rh7 17.Rhe1 Qb6 18.Nxe4 Rxd4 19.Rxd4 Qxd4 20.Qb3 Rd7 21.
a3 b6 22.f3 Qd5 23.Qa4 Kb7 24.g4 hxg4 25.hxg4 Bxe4 26.Rxe4 Bg7 27.Re3 Qd1+
28.Ka2 Qd5+ 29.c4 Qd2 30.c5 Qd5+ 31.Rb3 f5 32.gxf5 gxf5 33.Bg1 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "11"]
[White "Van der Wiel, John"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2465"]
[BlackElo "2590"]
[ECO "B09"]
[EventDate "1980.06.26"]
[PlyCount "71"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Nf3 c5 6.Bb5+ Bd7 7.Bxd7+ Nfxd7 8.d5 
O-O 9.O-O Na6 10.Qe2 Nc7 11.a4 a6 12.Rd1 b6 13.e5 Qc8 14.Ne4 dxe5 15.d6 
exd6 16.Nxd6 Qb8 17.Ng5 Nf6 18.fxe5 Nfd5 19.Ngxf7 Rxf7 20.Nxf7 Kxf7 21.
Qf3+ Kg8 22.Rxd5 Nxd5 23.Qxd5+ Kh8 24.Bf4 Qd8 25.Rd1 Qxd5 26.Rxd5 Kg8 27.
Kf2 Kf8 28.Ke3 Ke8 29.Rd6 b5 30.b3 c4 31.axb5 axb5 32.Re6+ Kf8 33.Rb6 g5 
34.Bg3 Ra2 35.e6 Ke7 36.Be1 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "11"]
[White "Timman, Jan"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2610"]
[ECO "E15"]
[EventDate "1980.06.26"]
[PlyCount "82"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.cxd5 
Nxd5 9.Nc3 Nd7 10.Nxd5 exd5 11.O-O O-O 12.Bf4 Re8 13.Rc1 c5 14.Re1 Nf6 15.
Bg5 Rc8 16.dxc5 Bxc5 17.Bh3 Ra8 18.Nd4 h6 19.Bf4 Ne4 20.b4 Bxb4 21.Nc6 
Nxf2 22.Kxf2 Bxe1+ 23.Kxe1 Qf6 24.Bg4 g5 25.Bc7 Re4 26.Qxd5 Rae8 27.Be5 
R4xe5 28.Nxe5 Rxe5 29.Qa8+ Kg7 30.Qxa7 Ra5 31.Qc7 Rxa2 32.Qc3 Qxc3+ 33.
Rxc3 Bb7 34.Rb3 Ra6 35.Bf3 Bxf3 36.exf3 Kf6 37.Rb5 Ke6 38.h4 f6 39.hxg5 
hxg5 40.g4 Kd7 41.Rf5 Ra1+ 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "11"]
[White "Sosonko, Gennadi"]
[Black "Dolmatov, Sergei"]
[Result "1/2-1/2"]
[WhiteElo "2545"]
[BlackElo "2535"]
[ECO "D43"]
[EventDate "1980.06.26"]
[PlyCount "28"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Qb3 Be7 6.g3 a5 7.Bg2 O-O 8.cxd5 exd5
9.O-O Nbd7 10.Bf4 Nh5 11.Bd2 Nhf6 12.Bf4 Nh5 13.Bd2 Nhf6 14.Bf4 Nh5 
1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "12"]
[White "Ribli, Zoltan"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2610"]
[BlackElo "2545"]
[ECO "A37"]
[EventDate "1980.06.26"]
[PlyCount "33"]

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e6 6.h4 d5 7.h5 Nge7 8.cxd5 exd5
9.d3 h6 10.hxg6 fxg6 11.Bd2 g5 12.Qa4 Bd7 13.O-O Nd4 14.Qd1 Be6 15.Rc1 O-O
16.a3 Qd7 17.b4 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "12"]
[White "Larsen, Bent"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2590"]
[BlackElo "2600"]
[ECO "A29"]
[EventDate "1980.06.26"]
[PlyCount "76"]

1.c4 e5 2.g3 Nf6 3.Bg2 d5 4.cxd5 Nxd5 5.Nc3 Nb6 6.d3 Be7 7.Nf3 Nc6 8.O-O 
O-O 9.a3 Be6 10.b4 f6 11.Bb2 Qe8 12.Nd2 Qf7 13.Rc1 Rfd8 14.Nb5 Bd5 15.Bxd5
Nxd5 16.e4 Nb6 17.Nb3 a6 18.Nxc7 Rac8 19.b5 Rxc7 20.bxc6 Na4 21.Ba1 Bxa3 
22.Rb1 b5 23.Na5 Bc5 24.Rc1 Rd6 25.d4 Bxd4 26.Bxd4 Rxd4 27.Qc2 Nb6 28.Rfd1
Nc4 29.Nb3 Rxd1+ 30.Qxd1 Qe8 31.Qd5+ Kh8 32.Nd2 h6 33.Nxc4 Qxc6 34.Ra1 
bxc4 35.Rxa6 Qxa6 36.Qd8+ Kh7 37.Qxc7 Qa1+ 38.Kg2 Qd4 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "12"]
[White "Hort, Vlastimil"]
[Black "Van der Wiel, John"]
[Result "1-0"]
[WhiteElo "2595"]
[BlackElo "2465"]
[ECO "E12"]
[EventDate "1980.06.26"]
[PlyCount "61"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 c5 5.d5 Ba6 6.b3 exd5 7.cxd5 g6 8.Bb2 Bg7 
9.e4 Bxf1 10.Kxf1 d6 11.Nbd2 O-O 12.Qc2 Re8 13.Re1 Qc8 14.h3 b5 15.g4 Nbd7
16.Re3 Qb7 17.Kg2 Nb6 18.Qb1 Re7 19.Qa1 Nbd7 20.g5 Nh5 21.Bxg7 Nxg7 22.Nh2
h5 23.Ng4 hxg4 24.hxg4 Rae8 25.Reh3 f6 26.gxf6 Rxe4 27.Nxe4 Qxd5 28.Rf3 
Nf5 29.f7+ Kxf7 30.Rh7+ Ke6 31.Ng5# 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "12"]
[White "Dolmatov, Sergei"]
[Black "Karpov, Anatoly"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2725"]
[ECO "C09"]
[EventDate "1980.06.26"]
[PlyCount "33"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6 6.Bb5 Bd6 7.dxc5 Bxc5 8.
O-O Ne7 9.Nb3 Bd6 10.Bg5 O-O 11.Re1 Bg4 12.Be2 a6 13.c3 Qc7 14.h3 Bh5 15.
Bxe7 Nxe7 16.Nfd4 Bxe2 17.Qxe2 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "13"]
[White "Karpov, Anatoly"]
[Black "Ribli, Zoltan"]
[Result "1-0"]
[WhiteElo "2725"]
[BlackElo "2610"]
[ECO "A38"]
[EventDate "1980.06.26"]
[PlyCount "69"]

1.c4 c5 2.Nf3 Nf6 3.Nc3 Nc6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 g6 7.O-O Bg7 8.Nxd5 
Qxd5 9.d3 O-O 10.Be3 Bd7 11.Nd4 Qd6 12.Nxc6 Bxc6 13.Bxc6 Qxc6 14.Rc1 Qe6 
15.Rxc5 Qxa2 16.Rb5 b6 17.Qa1 Qxa1 18.Rxa1 Rfb8 19.Ra6 Kf8 20.Rb4 Be5 21.
Rba4 b5 22.Ra2 Rb7 23.b3 Bb8 24.Bc5 Ke8 25.d4 Kd7 26.e4 e6 27.b4 Kc8 28.d5
exd5 29.exd5 Rd7 30.d6 Rd8 31.Kg2 Kd7 32.Re2 Kc8 33.Re7 Rd7 34.Ra2 a5 35.
Rc2 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "13"]
[White "Sosonko, Gennadi"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2545"]
[BlackElo "2590"]
[ECO "E08"]
[EventDate "1980.06.26"]
[PlyCount "111"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.b3 b5 
9.c5 Ne4 10.Bb2 f5 11.Ne1 a5 12.Nd3 Bf6 13.f3 Ng5 14.Nd2 Qc7 15.e4 fxe4 
16.fxe4 b4 17.Nf4 Ba6 18.Rfe1 Rfe8 19.e5 Bd8 20.h4 Nf7 21.Bh3 Nf8 22.Nf3 
Nh8 23.Bc1 Ra7 24.Bd2 Qf7 25.Bg4 Nfg6 26.Bh5 Rf8 27.a3 bxa3 28.Rxa3 Qd7 
29.Nh3 Ne7 30.Nf4 Nhg6 31.Nxg6 hxg6 32.Bg4 Bb5 33.Bg5 Rxf3 34.Bxf3 Nf5 35.
Qd2 Nxg3 36.Bg4 Ne4 37.Qf4 Nxg5 38.hxg5 Qe8 39.Qe3 Rf7 40.Ra2 Rf5 41.Bxf5 
gxf5 42.Rg2 Qh5 43.g6 Qh4 44.Qf2 Qh6 45.Qe3 Qh4 46.Ra1 Kf8 47.Raa2 Ke8 48.
Raf2 Kd7 49.Rf4 Qh5 50.Qf3 Qh6 51.Qg3 Qh5 52.Qf3 Qh6 53.Qg3 Qh5 54.Rf3 Qh6
55.Qf4 Qh5 56.Rh2 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "13"]
[White "Timman, Jan"]
[Black "Van der Wiel, John"]
[Result "1-0"]
[WhiteElo "2600"]
[BlackElo "2465"]
[ECO "A14"]
[EventDate "1980.06.26"]
[PlyCount "73"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 b6 4.g3 c5 5.Bg2 Bb7 6.O-O Be7 7.b3 O-O 8.Bb2 d5 
9.e3 Nc6 10.cxd5 Nxd5 11.Nxd5 exd5 12.d4 Qd6 13.Qe2 a5 14.Rfd1 a4 15.dxc5 
bxc5 16.bxa4 Rxa4 17.a3 Ra7 18.Rac1 Rd8 19.Qc2 Qe6 20.Rd2 Na5 21.Ne5 c4 
22.e4 dxe4 23.Rxd8+ Bxd8 24.Nxc4 Ra8 25.Nxa5 Bxa5 26.Bd4 Bd5 27.Qb2 f6 28.
Qb5 Bd8 29.Bh3 f5 30.Rc5 Ra5 31.Qb8 Ra8 32.Qf4 Bb6 33.Bxf5 Qf7 34.Rxd5 
Qxd5 35.Bxb6 Ra6 36.Qb8+ Kf7 37.h4 1-0
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "13"]
[White "Dolmatov, Sergei"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2595"]
[ECO "B85"]
[EventDate "1980.06.26"]
[PlyCount "87"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Be7 8.f4 Qc7
9.Bf3 O-O 10.Be3 Nc6 11.Nxc6 bxc6 12.Na4 Bb7 13.c4 c5 14.Qc2 Nd7 15.Nc3 
Rfe8 16.Rad1 Rad8 17.b3 Nb8 18.Qf2 Bf8 19.Kh1 Rd7 20.f5 Nc6 21.Bh5 Ne5 22.
Qg3 Kh8 23.Bf4 g6 24.Bg5 exf5 25.exf5 h6 26.Bf6+ Bg7 27.Bxg7+ Kxg7 28.f6+ 
Kh7 29.Be2 Qd8 30.Nd5 Bxd5 31.cxd5 Qa5 32.a4 Rb7 33.Rde1 Rbb8 34.Bc4 Qd2 
35.h3 Nxc4 36.Rxe8 Rxe8 37.bxc4 Re5 38.Rb1 Rg5 39.Qh2 h5 40.Rb7 Kg8 41.
Rb8+ Kh7 42.Rf8 Re5 43.Rxf7+ Kh6 44.Re7 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "14"]
[White "Van der Wiel, John"]
[Black "Sosonko, Gennadi"]
[Result "0-1"]
[WhiteElo "2465"]
[BlackElo "2545"]
[ECO "B17"]
[EventDate "1980.06.26"]
[PlyCount "68"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6 7.Nf3 Bf5 8.
Qe2 e6 9.Bg5 Bg4 10.O-O-O Be7 11.h3 Bxf3 12.Qxf3 Nd5 13.Bxe7 Qxe7 14.Rhe1 
b5 15.Bd3 Rd8 16.Re5 Qf6 17.Be4 Qxf3 18.Bxf3 a5 19.b3 b4 20.Kb2 Ke7 21.Rc1
f6 22.Ree1 Nc3 23.a3 Rxd4 24.axb4 axb4 25.Ra1 Kd6 26.Ra7 e5 27.Rea1 g6 28.
Rf7 e4 29.Rxf6+ Ke5 30.Rxc6 exf3 31.Re1+ Kf5 32.g4+ Kg5 33.Rc5+ Kh4 34.
Ree5 Kxh3 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "14"]
[White "Ribli, Zoltan"]
[Black "Dolmatov, Sergei"]
[Result "1/2-1/2"]
[WhiteElo "2610"]
[BlackElo "2535"]
[ECO "D11"]
[EventDate "1980.06.26"]
[PlyCount "59"]

1.c4 c6 2.d4 d5 3.Nf3 Nf6 4.e3 Bg4 5.cxd5 Bxf3 6.Qxf3 cxd5 7.Nc3 e6 8.Qd1 
Be7 9.Be2 O-O 10.O-O Nc6 11.b3 a6 12.Bb2 b5 13.Rc1 Qb6 14.Qd3 Rfc8 15.Rfd1
Rc7 16.g3 h6 17.Kg2 Rac8 18.a4 b4 19.Nb1 Nb8 20.Nd2 Rxc1 21.Rxc1 Rxc1 22.
Bxc1 Qc6 23.Bb2 a5 24.Kf1 Nbd7 25.Ke1 Bd6 26.Kd1 Bc7 27.Bf3 Kf8 28.h3 Kg8 
29.Ke2 Kf8 30.Kd1 1/2-1/2
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "14"]
[White "Larsen, Bent"]
[Black "Karpov, Anatoly"]
[Result "0-1"]
[WhiteElo "2590"]
[BlackElo "2725"]
[ECO "E19"]
[EventDate "1980.06.26"]
[PlyCount "46"]

1.Nf3 Nf6 2.g3 b6 3.Bg2 Bb7 4.O-O e6 5.c4 Be7 6.Nc3 O-O 7.d4 Ne4 8.Qc2 
Nxc3 9.Qxc3 c5 10.Rd1 d6 11.Be3 Nd7 12.Rac1 Rc8 13.d5 exd5 14.cxd5 Re8 15.
b4 Bf6 16.Qb3 cxb4 17.Rxc8 Qxc8 18.Qxb4 Qc2 19.Rc1 Qxe2 20.Qxd6 Nf8 21.Nd4
Bxd4 22.Bxd4 Qd2 23.Qf4 Re1+ 0-1
[Event "20th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1980.06.??"]
[Round "14"]
[White "Hort, Vlastimil"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2600"]
[ECO "D37"]
[EventDate "1980.06.26"]
[PlyCount "28"]

1.Nf3 Nf6 2.c4 b6 3.b3 e6 4.Bb2 Bb7 5.e3 Be7 6.Be2 O-O 7.O-O d5 8.Nc3 dxc4
9.Bxc4 a6 10.d4 Nbd7 11.a4 c5 12.Qe2 cxd4 13.exd4 Bb4 14.Rac1 Nh5 1/2-1/2
