[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Byrne, Robert"]
[Black "Torre, Eugenio"]
[WhiteElo "2535"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "B68"]
[EventDate "1979.07.11"]
[PlyCount "41"]

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 
Bd7 9.f4 Be7 10.Be2 O-O 11.Nf3 Qa5 12.Kb1 Rfd8 13.Bd3 Be8 14.Rhe1 Rac8 15.
e5 dxe5 16.fxe5 Nd5 17.Nxd5 Rxd5 18.Qxa5 Rxa5 19.Bxe7 Nxe7 20.Be4 Nc6 21.
c3 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Donner, Jan"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2465"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "A50"]
[EventDate "1979.07.11"]
[PlyCount "49"]

1.d4 Nf6 2.c4 b6 3.Nc3 Bb7 4.Qc2 d5 5.cxd5 Nxd5 6.Nf3 e6 7.e4 Nxc3 8.bxc3 
Be7 9.Be3 Nd7 10.Rd1 Qc8 11.Be2 O-O 12.O-O Nf6 13.Bd3 c5 14.Qb1 cxd4 15.
cxd4 Ba6 16.Bg5 Bxd3 17.Qxd3 Qb7 18.d5 exd5 19.exd5 Rad8 20.Bxf6 Bxf6 21.
d6 Rd7 22.Qa3 Rfd8 23.Rd3 Qc6 24.Rfd1 Qc5 25.Qxc5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Farago, Ivan"]
[Black "Ligterink, Gert"]
[WhiteElo "2510"]
[BlackElo "2440"]
[Result "1/2-1/2"]
[ECO "E20"]
[EventDate "1979.07.11"]
[PlyCount "189"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2 d5 7.cxd5 cxd4 8.Nxd4 
Nxd5 9.Bd2 Nxc3 10.bxc3 Bc5 11.Nb3 Bb6 12.c4 Nc6 13.O-O e5 14.Bc3 Qe7 15.
Qc2 Be6 16.Bd5 Rac8 17.Qb2 Rfd8 18.Rad1 Bh3 19.Rfe1 Qf6 20.c5 Bc7 21.Rd2 
b5 22.Bh1 b4 23.Rxd8+ Rxd8 24.Bd2 a5 25.Be3 Qe6 26.Nd2 f6 27.a3 Rb8 28.
axb4 Nxb4 29.Qc3 Nd5 30.Bxd5 Qxd5 31.f3 Be6 32.Ra1 Rb4 33.Kg2 Qc6 34.Ra3 
h5 35.Kf2 h4 36.Nb3 Qb5 37.Nxa5 hxg3+ 38.hxg3 Rb2 39.Bd2 Rxd2 40.Qxd2 
Qxc5+ 41.Qe3 Bb6 42.Nc4 Bxc4 43.Ra8+ Kf7 44.Qxc5 Bxc5+ 45.e3 Ke7 46.g4 Kd6
47.Rh8 g6 48.Rf8 Ke6 49.Rg8 Bd3 50.Rc8 Kd5 51.Rd8+ Kc4 52.Rc8 Kb4 53.Re8 
Bc4 54.Rb8+ Bb5 55.Rg8 Bd3 56.Rb8+ Kc4 57.Re8 Kd5 58.Rd8+ Bd6 59.e4+ Ke6 
60.Kg2 Bb5 61.Rc8 Bd7 62.Rg8 Kf7 63.Rd8 Ke7 64.Rg8 Be8 65.Rg7+ Bf7 66.Rh7 
Bc5 67.Rg7 Be3 68.Rh7 Ke6 69.Rg7 Be8 70.Rg8 Bc6 71.Rg7 g5 72.Rg6 Bb5 73.
Rh6 Bf4 74.Kf2 Kd6 75.Rxf6+ Kc5 76.Rf8 Kd4 77.Rd8+ Kc3 78.Ra8 Bc4 79.Rd8 
Bd3 80.Ra8 Kd2 81.Ra2+ Bc2 82.Ra3 Bb1 83.Rb3 Bd3 84.Rb2+ Bc2 85.Ra2 Be3+ 
86.Kg2 Bd4 87.Kg3 Kd1 88.Kg2 Bd3 89.Ra3 Be2 90.Rb3 Kd2 91.Rb8 Ke1 92.Rb1+ 
Kd2 93.Rb8 Bd3 94.Rc8 Kd1 95.Rc7 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Hort, Vlastimil"]
[Black "Stean, Michael Francis"]
[WhiteElo "2600"]
[BlackElo "2540"]
[Result "1/2-1/2"]
[ECO "B20"]
[EventDate "1979.07.11"]
[PlyCount "49"]

1.f4 g6 2.g3 Bg7 3.Bg2 c5 4.e4 Nc6 5.Nh3 d5 6.Nc3 dxe4 7.Nxe4 Nf6 8.Nxf6+ 
Bxf6 9.Nf2 Bg7 10.O-O O-O 11.d3 Qc7 12.c3 b6 13.Bd2 Bb7 14.a3 Rad8 15.Qa4 
Na5 16.Bxb7 Qxb7 17.Rad1 Qd7 18.Qc2 Qc6 19.Ne4 Rd7 20.Be3 Rfd8 21.f5 gxf5 
22.Rxf5 Qe6 23.Rf3 Qb3 24.Qxb3 Nxb3 25.Nf2 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Sax, Gyula"]
[Black "Lein, Anatoly"]
[WhiteElo "2590"]
[BlackElo "2535"]
[Result "1-0"]
[ECO "B10"]
[EventDate "1979.07.11"]
[PlyCount "83"]

1.e4 c6 2.c4 d5 3.cxd5 cxd5 4.exd5 Nf6 5.Nc3 Nxd5 6.Bc4 Nb6 7.Bb3 Nc6 8.
Nf3 e6 9.O-O Be7 10.d4 O-O 11.a3 Bf6 12.Be3 Nd5 13.Qd3 Nxc3 14.bxc3 b6 15.
Bc2 g6 16.Bh6 Re8 17.Rad1 Bb7 18.Ba4 Qe7 19.c4 Red8 20.d5 exd5 21.cxd5 Ne5
22.Qe4 a6 23.Rfe1 Nxf3+ 24.gxf3 Qxe4 25.fxe4 b5 26.Bb3 Be7 27.e5 Bxa3 28.
d6 Bf3 29.Rd4 Bc6 30.Rf4 Rf8 31.e6 Bxd6 32.Rxf7 Rxf7 33.exf7+ Kh8 34.Re6 
Bf8 35.Bxf8 Rxf8 36.Rxc6 a5 37.Rb6 a4 38.Bd5 Kg7 39.Rxb5 Rd8 40.Ra5 a3 41.
Ba2 Rd3 42.Ra8 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Smejkal, Jan"]
[Black "Andersson, Ulf"]
[WhiteElo "2560"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1979.07.11"]
[PlyCount "95"]

1.c4 c5 2.Nf3 e6 3.Nc3 Nf6 4.g3 b6 5.e4 Bb7 6.d3 Be7 7.Bg2 O-O 8.O-O d6 9.
b3 a6 10.Bb2 Re8 11.Qe2 Nc6 12.Rfd1 Nd4 13.Nxd4 cxd4 14.Nb1 e5 15.Nd2 b5 
16.b4 Nd7 17.Nb3 bxc4 18.dxc4 Qb6 19.Ba3 Bc6 20.Na5 Ba4 21.Rdc1 Qa7 22.Bh3
Bg5 23.Rcb1 Bd8 24.Nb3 Bb6 25.Rc1 Nf6 26.c5 Bc7 27.Nd2 Bb5 28.Qf3 dxc5 29.
bxc5 Ba5 30.Nc4 Bc3 31.Rxc3 dxc3 32.Nd6 c2 33.Qb3 Red8 34.Qxc2 Bc6 35.Re1 
Rab8 36.Qc3 Rxd6 37.cxd6 Nxe4 38.Qe3 Qxe3 39.fxe3 Ng5 40.Bg2 Nf3+ 41.Bxf3 
Bxf3 42.h3 Bd5 43.Rc1 h5 44.Rc5 Bxa2 45.Rxe5 Be6 46.Rxh5 Rb3 47.Ra5 Rxe3 
48.Kf2 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.11"]
[Round "1"]
[White "Sosonko, Gennadi"]
[Black "Ree, Hans"]
[WhiteElo "2535"]
[BlackElo "2480"]
[Result "0-1"]
[ECO "D98"]
[EventDate "1979.07.11"]
[PlyCount "92"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Ne5 
Be6 9.d5 Bc8 10.Be2 e6 11.Bf4 exd5 12.exd5 Ne8 13.O-O Nd6 14.Qd3 Bf5 15.
Qd2 Nd7 16.Nxd7 Bxd7 17.Rac1 Re8 18.b3 Bxc3 19.Qxc3 Rxe2 20.Qxc7 Nb5 21.
Qxb7 Rxa2 22.Be5 Re2 23.Ba1 Rb8 24.Qa6 Qb6 25.Qa4 Rbe8 26.Qh4 R2e4 27.Qh6 
f6 28.Rc4 Re1 29.g4 Rxf1+ 30.Kxf1 Qd6 31.Kg2 Qxd5+ 32.Kg3 Qg5 33.Qxg5 fxg5
34.h4 Re1 35.Bf6 Rg1+ 36.Kf3 gxh4 37.Bxh4 Rb1 38.b4 Be6 39.Rf4 Rc1 40.Be7 
Rc3+ 41.Kg2 Rc4 42.Rxc4 Bxc4 43.f4 Kf7 44.Bc5 Ke6 45.Kg3 a6 46.Kh4 Nc3 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Andersson, Ulf"]
[Black "Hort, Vlastimil"]
[WhiteElo "2560"]
[BlackElo "2600"]
[Result "0-1"]
[ECO "B08"]
[EventDate "1979.07.11"]
[PlyCount "76"]

1.Nf3 g6 2.e4 Bg7 3.d4 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O c6 7.Re1 b5 8.e5 Ne8 
9.Bf4 Na6 10.Qd2 Nac7 11.Rad1 Bf5 12.a3 a5 13.h3 Qd7 14.Bf1 b4 15.Ne4 Bxe4
16.Rxe4 d5 17.Ree1 Ne6 18.Be3 Qb7 19.h4 f5 20.exf6 Nxf6 21.Bd3 Ng4 22.Bg5 
Nxd4 23.Rxe7 Qb6 24.Bf4 Nxf3+ 25.gxf3 Rxf4 26.Rxg7+ Kxg7 27.Qxf4 Qxf2+ 28.
Kh1 Qxh4+ 29.Kg1 Qf2+ 30.Kh1 Nf6 31.Rf1 Qc5 32.Qc7+ Kf8 33.Re1 Re8 34.
Rxe8+ Kxe8 35.axb4 axb4 36.Kg2 Nd7 37.Qf4 Kd8 38.Qg4 Ne5 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Lein, Anatoly"]
[Black "Farago, Ivan"]
[WhiteElo "2535"]
[BlackElo "2510"]
[Result "1/2-1/2"]
[ECO "A14"]
[EventDate "1979.07.11"]
[PlyCount "35"]

1.c4 Nf6 2.Nf3 e6 3.g3 d5 4.Bg2 Be7 5.O-O O-O 6.b3 c5 7.e3 Nc6 8.Bb2 a6 9.
Qe2 b5 10.d3 Bb7 11.Rd1 Qb6 12.Nbd2 Rad8 13.cxd5 Rxd5 14.d4 cxd4 15.Nxd4 
Rd7 16.Rac1 Rc8 17.Nxc6 Bxc6 18.Bxc6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Ree, Hans"]
[Black "Ligterink, Gert"]
[WhiteElo "2480"]
[BlackElo "2440"]
[Result "1/2-1/2"]
[ECO "E39"]
[EventDate "1979.07.11"]
[PlyCount "51"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O 6.a3 Bxc5 7.Nf3 Nc6 8.Bf4 
b6 9.e3 Bb7 10.Be2 Be7 11.Rd1 Rc8 12.O-O a6 13.Rd2 Na5 14.Ne5 d6 15.b4 Qc7
16.bxa5 dxe5 17.axb6 Qc6 18.Bf3 e4 19.Be2 Nd7 20.Qxe4 Nxb6 21.Qxc6 Rxc6 
22.Rb1 Ba8 23.c5 Rxc5 24.Rxb6 Rxc3 25.Rxa6 Rxa3 26.Rxa3 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Sahovic, Dragutin"]
[Black "Smejkal, Jan"]
[WhiteElo "2520"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "B42"]
[EventDate "1979.07.11"]
[PlyCount "52"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Nf6 6.O-O Qc7 7.Qe2 d6 8.c4 g6 
9.b3 Bg7 10.Bb2 O-O 11.Nc3 b6 12.Rad1 Bb7 13.Rfe1 Nbd7 14.Bb1 Rad8 15.f3 
Rfe8 16.Qf2 Qb8 17.Bd3 Ne5 18.Bf1 d5 19.exd5 exd5 20.cxd5 Nxd5 21.Ne4 h6 
22.Ba1 f5 23.Nd2 b5 24.b4 Nxb4 25.N2b3 Qa7 26.Nxf5 Qxf2+ 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Sosonko, Gennadi"]
[Black "Byrne, Robert"]
[WhiteElo "2535"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "D43"]
[EventDate "1979.07.11"]
[PlyCount "52"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Qb3 Be7 6.g3 Ne4 7.Bg2 f5 8.Ne5 Nd7 
9.Nxd7 Qxd7 10.O-O Bf6 11.Bf4 O-O 12.cxd5 exd5 13.Nxe4 fxe4 14.Bxe4 Qe6 
15.Bf3 Bxd4 16.Rad1 Be5 17.Bxe5 Qxe5 18.e4 Bh3 19.exd5 Rxf3 20.Qxf3 Bxf1 
21.Kxf1 Qxb2 22.dxc6 Qb5+ 23.Kg2 Qxc6 24.Qxc6 bxc6 25.Rd7 a5 26.Rc7 Rb8 
1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Stean, Michael Francis"]
[Black "Sax, Gyula"]
[WhiteElo "2540"]
[BlackElo "2590"]
[Result "0-1"]
[ECO "A27"]
[EventDate "1979.07.11"]
[PlyCount "42"]

1.Nf3 Nc6 2.c4 e5 3.Nc3 f5 4.d4 e4 5.Bg5 Be7 6.Bxe7 Ncxe7 7.Nd2 Nf6 8.e3 
O-O 9.Be2 c6 10.c5 d5 11.cxd6 Qxd6 12.Nc4 Qc7 13.Qb3 Be6 14.Qa3 Bxc4 15.
Bxc4+ Kh8 16.O-O Ng6 17.Be2 f4 18.Rae1 Qd7 19.Qc5 f3 20.gxf3 Qh3 21.Nxe4 
Ng4 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.12"]
[Round "2"]
[White "Torre, Eugenio"]
[Black "Donner, Jan"]
[WhiteElo "2520"]
[BlackElo "2465"]
[Result "1/2-1/2"]
[ECO "D18"]
[EventDate "1979.07.11"]
[PlyCount "34"]

1.Nf3 d5 2.d4 Nf6 3.c4 c6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O 
Nbd7 9.h3 Bg6 10.Be2 a5 11.Nh4 O-O 12.Nxg6 hxg6 13.Qc2 Qe7 14.Rd1 e5 15.b3
e4 16.Bd2 Nb6 17.Bc4 Rfe8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Byrne, Robert"]
[Black "Ree, Hans"]
[WhiteElo "2535"]
[BlackElo "2480"]
[Result "1/2-1/2"]
[ECO "B85"]
[EventDate "1979.07.11"]
[PlyCount "55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 7.O-O Be7 8.f4 O-O
9.Qe1 Nc6 10.Be3 Bd7 11.Qg3 b5 12.Bf3 Nxd4 13.Bxd4 Bc6 14.Rad1 Qc7 15.e5 
dxe5 16.fxe5 Nd7 17.Ne4 Bxe4 18.Bxe4 Rad8 19.c3 Bc5 20.Kh1 Bxd4 21.cxd4 f5
22.exf6 Qxg3 23.hxg3 Nxf6 24.Bf3 Rd6 25.Rfe1 Rfd8 26.Re5 Kf7 27.Rde1 Re8 
28.Rd1 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Donner, Jan"]
[Black "Sosonko, Gennadi"]
[WhiteElo "2465"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "E41"]
[EventDate "1979.07.11"]
[PlyCount "34"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3+ 7.bxc3 d6 8.e4 e5
9.d5 Ne7 10.Nd2 Qa5 11.Qb3 O-O 12.f3 Nh5 13.g3 Bh3 14.Nf1 f5 15.exf5 Bxf5 
16.Bxf5 Nxf5 17.Nd2 Nf6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Farago, Ivan"]
[Black "Stean, Michael Francis"]
[WhiteElo "2510"]
[BlackElo "2540"]
[Result "1/2-1/2"]
[ECO "E55"]
[EventDate "1979.07.11"]
[PlyCount "43"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.e3 O-O 6.Bd3 d5 7.O-O dxc4 8.Bxc4 
Nbd7 9.a3 cxd4 10.axb4 dxc3 11.bxc3 Qc7 12.Qe2 b6 13.Bb2 Bb7 14.Ba6 Rfc8 
15.Rfc1 Bxa6 16.Rxa6 Qb7 17.Rca1 Nd5 18.Qd3 Qc7 19.h3 h6 20.R6a3 a5 21.Qd4
N5f6 22.c4 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Hort, Vlastimil"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2600"]
[BlackElo "2520"]
[Result "1-0"]
[ECO "A25"]
[EventDate "1979.07.11"]
[PlyCount "75"]

1.c4 e5 2.Nc3 Nf6 3.g3 Nc6 4.Bg2 g6 5.Nf3 Bg7 6.d4 exd4 7.Nxd4 O-O 8.O-O 
Re8 9.Nc2 d6 10.b3 Bf5 11.Rb1 Qd7 12.Bb2 Bh3 13.Nd5 Bxg2 14.Kxg2 Nxd5 15.
cxd5 Bxb2 16.Rxb2 Ne7 17.Qd3 Nf5 18.e4 Ng7 19.Nd4 f5 20.exf5 Qf7 21.Ne6 
Nxf5 22.Re2 c5 23.Rfe1 Qd7 24.h4 Ng7 25.Kh2 b5 26.Re4 Rac8 27.Qe2 a6 28.
Qg4 Nxe6 29.Rxe6 Rxe6 30.Rxe6 Qf7 31.Kg2 Rf8 32.Qe2 Rd8 33.Qe4 Rd7 34.Qg4 
Kg7 35.h5 Qf5 36.Qxf5 gxf5 37.Kf3 c4 38.bxc4 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Ligterink, Gert"]
[Black "Lein, Anatoly"]
[WhiteElo "2440"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "B15"]
[EventDate "1979.07.11"]
[PlyCount "80"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4 Bd6 7.Qe2+ Be7 8.
Nf3 O-O 9.O-O Bd6 10.Re1 Nd7 11.Bd3 Nb6 12.c3 Bg4 13.h3 Bh5 14.g4 Bg6 15.
Bxg6 hxg6 16.c4 Bb4 17.Rd1 Re8 18.Qd3 Bf8 19.Bf4 Qd7 20.Re1 Rxe1+ 21.Rxe1 
Rd8 22.b3 Nc8 23.Rd1 g5 24.Bc1 Ne7 25.Qc2 Ng6 26.d5 c5 27.Re1 Bd6 28.Qe4 
b5 29.Be3 bxc4 30.Qxc4 Bf8 31.Rd1 Qd6 32.a3 Re8 33.Rd3 Rd8 34.Rd1 a6 35.
Kf1 Be7 36.Rd3 Bf8 37.Rd1 Rd7 38.Rd3 Rd8 39.Rd1 Kh8 40.Rd3 Kg8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Sax, Gyula"]
[Black "Andersson, Ulf"]
[WhiteElo "2590"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "B15"]
[EventDate "1979.07.11"]
[PlyCount "25"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.c3 Bd6 7.Bd3 Qc7 8.
Qf3 O-O 9.Ne2 Re8 10.h4 Nd7 11.g4 Nf8 12.g5 fxg5 13.Bxg5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.13"]
[Round "3"]
[White "Smejkal, Jan"]
[Black "Torre, Eugenio"]
[WhiteElo "2560"]
[BlackElo "2520"]
[Result "1-0"]
[ECO "E62"]
[EventDate "1979.07.11"]
[PlyCount "81"]

1.Nf3 Nf6 2.c4 g6 3.d4 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O c6 7.Nc3 Bf5 8.Ne1 Qc8 
9.Qb3 Na6 10.e4 Be6 11.a4 Rb8 12.Nf3 Bh3 13.Re1 Bxg2 14.Kxg2 Nc7 15.h3 Nd7
16.Be3 Ne6 17.a5 c5 18.Nd5 Re8 19.Red1 Ra8 20.Qc2 Nb8 21.dxc5 dxc5 22.e5 
Nc6 23.Qe4 Qb8 24.Nf4 Ned4 25.Bxd4 Nxd4 26.Nxd4 cxd4 27.Nd3 Rd8 28.b4 Qc7 
29.Rdc1 Rac8 30.b5 f6 31.c5 a6 32.c6 bxc6 33.Rxc6 Qb7 34.exf6 exf6 35.Rac1
Kh8 36.Qf3 Rxc6 37.bxc6 Qc7 38.Rb1 Qxa5 39.Rb7 Rc8 40.Qe4 Qd8 41.Rd7 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Andersson, Ulf"]
[Black "Farago, Ivan"]
[WhiteElo "2560"]
[BlackElo "2510"]
[Result "1-0"]
[ECO "E08"]
[EventDate "1979.07.11"]
[PlyCount "111"]

1.c4 Nf6 2.Nf3 e6 3.d4 d5 4.g3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2 c6 8.b3 b5 
9.c5 Ne4 10.Nbd2 f5 11.Bb2 Qc7 12.b4 a5 13.a3 Ba6 14.Nb3 a4 15.Nc1 Rae8 
16.Nd3 Ng5 17.Nfe5 Nxe5 18.dxe5 Bc8 19.h4 Nf7 20.Qc3 Kh8 21.Kh2 Nh6 22.Bh3
g5 23.hxg5 Bxg5 24.Bc1 Qg7 25.Bxg5 Qxg5 26.Qd4 Rg8 27.Rh1 Ref8 28.Nf4 Nf7 
29.Kg2 Qg7 30.Nd3 f4 31.Qxf4 Ng5 32.Qh4 Ne4 33.Bg4 Rf7 34.Bf3 Nd2 35.Rh3 
Nc4 36.Qd4 Bd7 37.Qc3 Qg5 38.Rah1 Rgg7 39.Rh5 Qd2 40.Qxd2 Nxd2 41.Rh6 Nc4 
42.Bh5 Re7 43.Ra1 Rg8 44.g4 Kg7 45.g5 Kh8 46.f4 Be8 47.Bxe8 Rexe8 48.Rf6 
Rg6 49.Kg3 Kg7 50.Ne1 Nd2 51.Nf3 Nb3 52.Rh1 d4 53.Rh6 d3 54.exd3 Rd8 55.
Rxe6 Rxd3 56.Rd6 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Byrne, Robert"]
[Black "Donner, Jan"]
[WhiteElo "2535"]
[BlackElo "2465"]
[Result "1/2-1/2"]
[ECO "B09"]
[EventDate "1979.07.11"]
[PlyCount "44"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3 c5 7.dxc5 Qa5 8.Bd3 Ng4
9.Bd2 Qxc5 10.Qe2 Nf6 11.Be3 Qa5 12.O-O Bg4 13.Nd1 Nc6 14.c3 e5 15.Nf2 
exf4 16.Bxf4 Ne5 17.Bxe5 Bxf3 18.Qxf3 Qxe5 19.Bc4 Rae8 20.Rae1 Qc5 21.Bb3 
Re7 22.Kh1 a5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Ree, Hans"]
[Black "Lein, Anatoly"]
[WhiteElo "2480"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1979.07.11"]
[PlyCount "42"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 Bb4 5.Nd5 Be7 6.d3 d6 7.Bg2 O-O 8.O-O Bg4
9.h3 Be6 10.e4 a5 11.Re1 Nd7 12.Be3 Re8 13.d4 exd4 14.Nxd4 Nxd4 15.Qxd4 
Bf8 16.Rad1 f6 17.f4 Bf7 18.Bf2 c6 19.Ne3 Qc7 20.Nf5 Re6 21.Qd2 a4 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Sahovic, Dragutin"]
[Black "Sax, Gyula"]
[WhiteElo "2520"]
[BlackElo "2590"]
[Result "0-1"]
[ECO "A49"]
[EventDate "1979.07.11"]
[PlyCount "54"]

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.Nc3 Nbd7 7.e4 e5 8.Re1 
exd4 9.Nxd4 Re8 10.h3 Nc5 11.Kh2 Bd7 12.Nb3 Na4 13.Nxa4 Bxa4 14.c3 Bc6 15.
f3 b6 16.Be3 d5 17.exd5 Bxd5 18.Bd4 Rxe1 19.Qxe1 c5 20.Bxf6 Qxf6 21.Rd1 
Bxf3 22.Bxf3 Qxf3 23.Rd7 Qf5 24.Qd2 Bh6 25.Qg2 Re8 26.Rxa7 Re1 27.Ra8+ Kg7
0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Sosonko, Gennadi"]
[Black "Smejkal, Jan"]
[WhiteElo "2535"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "D98"]
[EventDate "1979.07.11"]
[PlyCount "33"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 
Nfd7 9.O-O-O Nb6 10.Qc5 e6 11.h3 Bxf3 12.gxf3 N8d7 13.Qa3 Qh4 14.Kb1 Bh6 
15.Bxh6 Qxh6 16.h4 Nf6 17.Nb5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Stean, Michael Francis"]
[Black "Ligterink, Gert"]
[WhiteElo "2540"]
[BlackElo "2440"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1979.07.11"]
[PlyCount "34"]

1.c4 c5 2.Nf3 Nf6 3.Nc3 e6 4.g3 b6 5.Bg2 Bb7 6.O-O Be7 7.d4 cxd4 8.Qxd4 d6
9.b3 O-O 10.Ba3 d5 11.Bxe7 Qxe7 12.cxd5 Nxd5 13.Rac1 Nxc3 14.Qxc3 Nc6 15.
Ne5 Nxe5 16.Bxb7 Qxb7 17.Qxe5 Rac8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.15"]
[Round "4"]
[White "Torre, Eugenio"]
[Black "Hort, Vlastimil"]
[WhiteElo "2520"]
[BlackElo "2600"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1979.07.11"]
[PlyCount "51"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Bc4 Nf6 5.Qe2 O-O 6.O-O Bg4 7.c3 Nc6 8.Bb5 Qe8
9.Nbd2 a6 10.Bxc6 Qxc6 11.Re1 Rae8 12.h3 Bc8 13.Nf1 Nd7 14.Ng3 Nb6 15.Be3 
e5 16.b3 f5 17.exf5 gxf5 18.dxe5 f4 19.Bxb6 fxg3 20.Be3 Bxh3 21.fxg3 Bg4 
22.Bf2 Bxf3 23.gxf3 Rxe5 24.Qc4+ Qxc4 25.bxc4 Rxf3 26.Kg2 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Donner, Jan"]
[Black "Ree, Hans"]
[WhiteElo "2465"]
[BlackElo "2480"]
[Result "0-1"]
[ECO "A64"]
[EventDate "1979.07.11"]
[PlyCount "66"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 c5 6.d5 d6 7.Nf3 e6 8.O-O exd5 
9.cxd5 a6 10.a4 Nbd7 11.Nd2 Re8 12.h3 Rb8 13.Nc4 Ne5 14.Na3 Nh5 15.f4 Nxg3
16.fxe5 Bxe5 17.Nc4 Bxc3 18.bxc3 b5 19.axb5 axb5 20.Ne3 Nxf1 21.Nxf1 Qh4 
22.Qd3 b4 23.e4 f5 24.Qg3 Qxg3 25.Nxg3 bxc3 26.Ra3 c2 27.Rc3 fxe4 28.Rxc2 
e3 29.Re2 Rb1 30.Re1 Bf5 31.Bf1 c4 32.Rxe3 Rxe3 33.Bxe3 Bxh3 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Farago, Ivan"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2510"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "A40"]
[EventDate "1979.07.11"]
[PlyCount "76"]

1.d4 c6 2.c4 Na6 3.Nc3 Nc7 4.d5 d6 5.e4 g6 6.Nf3 Bg7 7.Be2 e5 8.O-O c5 9.
b4 cxb4 10.Qa4+ Kf8 11.Qxb4 Na6 12.Qa3 Nc5 13.Be3 b6 14.Na4 Nxa4 15.Qxa4 
Bh6 16.Bd2 Bxd2 17.Nxd2 Kg7 18.f4 exf4 19.Rxf4 Qe7 20.Raf1 Nh6 21.Qa3 Re8 
22.Qg3 Bd7 23.Rf6 Qe5 24.Rxd6 Qd4+ 25.Qf2 Qxd2 26.Rxd7 Rxe4 27.Bf3 Qxf2+ 
28.Rxf2 Rxc4 29.d6 Rac8 30.Rxa7 Rd8 31.Rd2 Nf5 32.d7 Rd4 33.Rxd4 Nxd4 34.
Bd5 Kf8 35.Rb7 b5 36.Kf2 Ke7 37.Ke3 Nf5+ 38.Kf4 Nd6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Hort, Vlastimil"]
[Black "Sosonko, Gennadi"]
[WhiteElo "2600"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "A46"]
[EventDate "1979.07.11"]
[PlyCount "48"]

1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 Qb6 5.Qc1 Ne4 6.Bf4 d5 7.Bd3 Nc6 8.c3 Bd7 
9.O-O Rc8 10.Nbd2 f5 11.Be5 Nxe5 12.Nxe5 Nf6 13.Ndf3 Bd6 14.Nxd7 Nxd7 15.
b3 O-O 16.Qc2 g6 17.Rad1 Qc7 18.c4 cxd4 19.Nxd4 Rfe8 20.g3 a6 21.cxd5 Qxc2
22.Nxc2 exd5 23.Nd4 Ba3 24.Nc2 Bf8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Lein, Anatoly"]
[Black "Stean, Michael Francis"]
[WhiteElo "2535"]
[BlackElo "2540"]
[Result "1-0"]
[ECO "E15"]
[EventDate "1979.07.11"]
[PlyCount "49"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 c6 8.Bg5 d5 
9.Nbd2 Nbd7 10.O-O O-O 11.Qc2 Rc8 12.e4 c5 13.exd5 exd5 14.Rad1 dxc4 15.
Nxc4 b5 16.Nce5 b4 17.Rfe1 cxd4 18.Nc6 d3 19.Qc1 Rxc6 20.Qxc6 Nb6 21.Ne5 
Nfd5 22.Bxe7 Nxe7 23.Qc1 Ng6 24.Nxd3 Bxd3 25.Qe3 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Ligterink, Gert"]
[Black "Andersson, Ulf"]
[WhiteElo "2440"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "B82"]
[EventDate "1979.07.11"]
[PlyCount "104"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Be3 e5 8.Nf3 Be7
9.Qd2 Ng4 10.O-O-O Nxe3 11.Qxe3 exf4 12.Qxf4 Be6 13.Nd5 Bxd5 14.exd5 Ne5 
15.Bb5+ Kf8 16.Rhf1 Nxf3 17.Qxf3 Bf6 18.Rde1 Qb6 19.Qe2 Be5 20.c3 g6 21.
Qf3 f5 22.Bd7 Kg7 23.g4 Qd8 24.Be6 Qg5+ 25.Kc2 fxg4 26.Bxg4 Rhf8 27.Qe2 
Rf4 28.Rxf4 Qxf4 29.h3 Rf8 30.Qb5 h5 31.Be6 Kh6 32.Kb3 Qf2 33.Re2 Qf1 34.
Qd3 Rf3 35.Qd2+ Bf4 36.Qd4 Be5 37.Qd2+ Rf4 38.a3 Kg7 39.Qc2 Qg1 40.Rg2 
Qb6+ 41.Ka2 Rf6 42.Bf5 Qb5 43.Bxg6 Qc4+ 44.b3 Qxc3 45.Bxh5+ Kh6 46.Qxc3 
Bxc3 47.Bg4 Bd4 48.b4 Rf2+ 49.Rxf2 Bxf2 50.Kb3 Be3 51.Kc4 Bc1 52.a4 b6 
1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Sax, Gyula"]
[Black "Torre, Eugenio"]
[WhiteElo "2590"]
[BlackElo "2520"]
[Result "0-1"]
[ECO "B10"]
[EventDate "1979.07.11"]
[PlyCount "104"]

1.e4 c6 2.d3 e5 3.Nf3 Nf6 4.g3 Be7 5.Bg2 O-O 6.O-O d6 7.h3 Re8 8.c4 Bf8 9.
Nc3 Na6 10.Ne1 Nd7 11.Rb1 Nc7 12.f4 exf4 13.gxf4 f5 14.Nf3 Nf6 15.e5 Nh5 
16.d4 Ne6 17.Ne2 d5 18.cxd5 Qxd5 19.Ng5 Qd8 20.Qb3 h6 21.Nf3 g6 22.Be3 Kh7
23.Rbd1 Nc7 24.Nc3 Ne6 25.Nh2 Qb6 26.Qxb6 axb6 27.d5 cxd5 28.Nxd5 Rxa2 29.
Bf3 Neg7 30.Nc7 Re7 31.Nd5 Rf7 32.Nxb6 Be6 33.Rf2 Nxf4 34.Bxf4 Bc5 35.Nd5 
Bxf2+ 36.Kxf2 Rxb2+ 37.Kg1 g5 38.Nf6+ Kg6 39.h4 gxf4 40.h5+ Kg5 41.Bg2 f3 
42.Nxf3+ Kf4 43.Rd4+ Ke3 44.Rd1 Rc7 45.Ne1 Rd2 46.Rb1 Ba2 47.Ra1 Ne6 48.
Ne8 Rc3 49.Bxb7 Kf4 50.Ng2+ Kg5 51.Nd6 Rb2 52.Be4 Rg3 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.16"]
[Round "5"]
[White "Smejkal, Jan"]
[Black "Byrne, Robert"]
[WhiteElo "2560"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "E05"]
[EventDate "1979.07.11"]
[PlyCount "47"]

1.c4 e6 2.Nf3 Nf6 3.g3 d5 4.d4 Be7 5.Bg2 O-O 6.O-O dxc4 7.Ne5 Nc6 8.Nxc6 
bxc6 9.Bxc6 Rb8 10.Nc3 Bb7 11.Bb5 Bd5 12.b3 cxb3 13.axb3 Ba8 14.Bc4 c5 15.
Bf4 Rc8 16.dxc5 Bxc5 17.Qxd8 Rfxd8 18.Ra2 h6 19.Na4 Nd7 20.Ba6 Rc6 21.Bb5 
Rcc8 22.Ba6 Rc6 23.Bb5 Rcc8 24.Ba6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Andersson, Ulf"]
[Black "Lein, Anatoly"]
[WhiteElo "2560"]
[BlackElo "2535"]
[Result "1-0"]
[ECO "A26"]
[EventDate "1979.07.11"]
[PlyCount "79"]

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Rb1 f5 7.e3 Nf6 8.Nge2 O-O 
9.O-O Kh8 10.Bd2 Ne7 11.Qc2 Rb8 12.f4 Bd7 13.Rbe1 a6 14.e4 b5 15.cxb5 axb5
16.Nd5 fxe4 17.dxe4 Nexd5 18.exd5 Bf5 19.Qb3 Nd7 20.fxe5 Nc5 21.Qe3 Bxe5 
22.Bc3 Re8 23.Nf4 Qf6 24.g4 Bxc3 25.Qxe8+ Rxe8 26.Rxe8+ Kg7 27.bxc3 Qxc3 
28.gxf5 Kf7 29.Re2 gxf5 30.Ne6 Kg6 31.Bh3 Kh6 32.Bxf5 Qc4 33.Re3 Nxe6 34.
dxe6 Qd4 35.Rf3 Qa1+ 36.Kg2 Qb2+ 37.Rf2 Qd4 38.Re4 Qg7+ 39.Rg4 Qe7 40.Rf3 
1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Byrne, Robert"]
[Black "Hort, Vlastimil"]
[WhiteElo "2535"]
[BlackElo "2600"]
[Result "1/2-1/2"]
[ECO "B84"]
[EventDate "1979.07.11"]
[PlyCount "44"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 7.f4 Nc6 8.Be3 Bd7
9.O-O Be7 10.Qe1 O-O 11.Rd1 Qb8 12.Qg3 Rd8 13.Nf3 Be8 14.Bb6 Rc8 15.f5 Ne5
16.fxe6 fxe6 17.Qh3 Nxf3+ 18.Rxf3 Bf7 19.Bd3 Rc6 20.Bd4 e5 21.Nd5 Bd8 22.
Be3 Qc8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Donner, Jan"]
[Black "Smejkal, Jan"]
[WhiteElo "2465"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "A00"]
[EventDate "1979.07.11"]
[PlyCount "0"]

0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Ree, Hans"]
[Black "Stean, Michael Francis"]
[WhiteElo "2480"]
[BlackElo "2540"]
[Result "1-0"]
[ECO "E32"]
[EventDate "1979.07.11"]
[PlyCount "45"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6 7.Bg5 Bb7 8.e3 
c5 9.dxc5 bxc5 10.Nf3 h6 11.Bh4 g5 12.Bg3 Ne4 13.Qc2 Nxg3 14.hxg3 Qf6 15.
Be2 Nc6 16.O-O-O Rab8 17.Nh2 Rfd8 18.Ng4 Qg7 19.Nxh6+ Kf8 20.Nxf7 Qxf7 21.
Rh8+ Ke7 22.Rh7 Ne5 23.Bh5 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Sahovic, Dragutin"]
[Black "Ligterink, Gert"]
[WhiteElo "2520"]
[BlackElo "2440"]
[Result "1-0"]
[ECO "A46"]
[EventDate "1979.07.11"]
[PlyCount "111"]

1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.c3 b6 5.e3 Bb7 6.Nbd2 Be7 7.Bd3 cxd4 8.exd4 
d6 9.O-O Nbd7 10.Re1 O-O 11.Nf1 a6 12.a4 Qc7 13.Ng3 Rfe8 14.Nd2 Bc6 15.Nh5
Nxh5 16.Qxh5 Bxg5 17.Qxg5 Nf6 18.Nf1 b5 19.axb5 axb5 20.Ne3 Qb7 21.Qg3 Be4
22.Bf1 d5 23.f3 Bg6 24.Qd6 Ra4 25.b3 Rxa1 26.Rxa1 Ra8 27.Qc7 Qb8 28.Qxb8+ 
Rxb8 29.Bxb5 Kf8 30.Ba4 Ra8 31.Kf2 Nd7 32.Ke2 Nb6 33.Kd2 f6 34.Nc2 Bxc2 
35.Kxc2 e5 36.Kb2 exd4 37.cxd4 Rb8 38.Bb5 Rb7 39.Bd3 g5 40.Kc3 h5 41.Bf5 
Kf7 42.Re1 h4 43.Re6 Nc8 44.Ra6 Ne7 45.Be6+ Kg6 46.Ra5 Rb6 47.Bxd5 Nxd5+ 
48.Rxd5 Re6 49.b4 h3 50.gxh3 Re3+ 51.Kc4 Rxf3 52.b5 Rxh3 53.b6 Rxh2 54.b7 
Rh8 55.Kb5 g4 56.Rc5 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Sosonko, Gennadi"]
[Black "Sax, Gyula"]
[WhiteElo "2535"]
[BlackElo "2590"]
[Result "1/2-1/2"]
[ECO "D97"]
[EventDate "1979.07.11"]
[PlyCount "28"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6 8.Be2 
c5 9.d5 e6 10.Bg5 h6 11.Bxf6 Bxf6 12.e5 Bg7 13.d6 Bd7 14.O-O Bc6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.17"]
[Round "6"]
[White "Torre, Eugenio"]
[Black "Farago, Ivan"]
[WhiteElo "2520"]
[BlackElo "2510"]
[Result "1-0"]
[ECO "C09"]
[EventDate "1979.07.11"]
[PlyCount "87"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Bb5+ Nc6 6.Ngf3 Bd6 7.dxc5 Bxc5 8.
O-O Ne7 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 Bg4 12.Be2 h6 13.Bh4 Re8 14.c3 Qb6 15.
Bxe7 Rxe7 16.h3 Bh5 17.Qxd5 Rae8 18.Bc4 Ne5 19.Nxe5 Bxe5 20.Re3 Rd8 21.Qb5
Qc7 22.g3 Bd1 23.Qc5 Qxc5 24.Nxc5 Bf6 25.Ne4 Re5 26.Nxf6+ gxf6 27.Kf1 Kg7 
28.Ke1 Bf3 29.Be2 Rxe3 30.fxe3 Bg2 31.h4 Kg6 32.Rd1 Rxd1+ 33.Bxd1 Bd5 34.
b3 Kf5 35.c4 Bc6 36.Kf2 Ke4 37.Bh5 Kd3 38.Bxf7 Kc3 39.Ke2 a5 40.Bd5 Kb2 
41.Kd2 Kxa2 42.Kc3 f5 43.b4 axb4+ 44.Kxb4 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Farago, Ivan"]
[Black "Sosonko, Gennadi"]
[WhiteElo "2510"]
[BlackElo "2535"]
[Result "0-1"]
[ECO "E41"]
[EventDate "1979.07.11"]
[PlyCount "98"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3+ 7.bxc3 d6 8.O-O 
e5 9.Nd2 O-O 10.d5 Ne7 11.f3 Ne8 12.e4 h6 13.Qc2 Ng6 14.g3 Bh3 15.Rf2 Qd7 
16.Ba3 a6 17.Kh1 b5 18.Rg1 f5 19.exf5 Bxf5 20.Ne4 bxc4 21.Bxc4 Nf6 22.Bd3 
Ne7 23.Rd1 Kh8 24.Kg1 Nxe4 25.fxe4 Bh3 26.Rdd2 Ng8 27.Rxf8 Rxf8 28.Rf2 
Rxf2 29.Kxf2 Nf6 30.Ke1 Bg4 31.Bc1 Bf3 32.Qb1 Kh7 33.Be3 Qh3 34.Qc2 Qg4 
35.Bxa6 Bxe4 36.Bd3 Qf3 37.Qe2 Qf5 38.Bxe4 Qxe4 39.c4 Qb1+ 40.Kf2 Ne4+ 41.
Kg2 Nc3 42.Qf3 Qxa2+ 43.Kh3 Qc2 44.Bd2 Nd1 45.Qf8 Qg6 46.Qf1 Nb2 47.Bc3 
Nd3 48.Ba5 h5 49.Bc7 Nf4+ 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Hort, Vlastimil"]
[Black "Donner, Jan"]
[WhiteElo "2600"]
[BlackElo "2465"]
[Result "1/2-1/2"]
[ECO "C65"]
[EventDate "1979.07.11"]
[PlyCount "94"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.c4 Be7 6.h3 O-O 7.O-O Nd7 8.Nc3 Nc5 
9.Be3 Ne6 10.Nd5 Ncd4 11.Nxd4 exd4 12.Bd2 c6 13.Nxe7+ Qxe7 14.Ba4 Nc5 15.
Bc2 Be6 16.Re1 Nd7 17.f4 f6 18.Qf3 a5 19.Qf2 c5 20.Ba4 Nb6 21.Bd1 Ra7 22.
Bf3 Nd7 23.a4 b6 24.h4 Rc7 25.h5 Kh8 26.Qh4 Rg8 27.Re2 h6 28.Rf1 Re8 29.
Be1 Nf8 30.Bg3 Nd7 31.Rfe1 Bf7 32.Qh2 Qf8 33.Bg4 Re7 34.b3 Rb7 35.Qh4 Bg8 
36.Bf5 Bh7 37.Qg4 Bxf5 38.Qxf5 Qf7 39.Qd5 Nf8 40.Qxf7 Rxf7 41.e5 fxe5 42.
fxe5 dxe5 43.Rxe5 Nd7 44.Re6 Nf6 45.R1e5 Ng4 46.Re4 Nf6 47.R4e5 Ng4 
1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Lein, Anatoly"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2535"]
[BlackElo "2520"]
[Result "1-0"]
[ECO "A77"]
[EventDate "1979.07.11"]
[PlyCount "113"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.e4 Bg7 8.Be2 O-O 
9.O-O Re8 10.Nd2 a6 11.a4 Nbd7 12.a5 b5 13.axb6 Nxb6 14.f4 Qc7 15.Bf3 Rb8 
16.Kh1 c4 17.Ra2 Nfd7 18.Na4 Bb7 19.Nxb6 Nxb6 20.Nb1 f5 21.exf5 gxf5 22.
Nc3 Qc5 23.Na4 Nxa4 24.Rxa4 Qb5 25.Rg1 Kh8 26.Ra3 Rbc8 27.Qc2 Bxd5 28.Bxd5
Qxd5 29.Rxa6 Re6 30.h3 Rce8 31.Ra4 Bd4 32.Qd1 Qc5 33.Ra5 Bxg1 34.Rxc5 Bxc5
35.Bd2 Kg8 36.Qh5 Rf8 37.Qf3 Re4 38.g4 Rfe8 39.gxf5 Bd4 40.b3 c3 41.Bxc3 
Bxc3 42.Qxc3 Re3 43.Qc4+ Kf8 44.Kg2 Re2+ 45.Kg3 R8e3+ 46.Kh4 Rh2 47.f6 
Rhxh3+ 48.Kg4 Reg3+ 49.Kf5 Rh5+ 50.Ke6 Re3+ 51.Kxd6 Rhh3 52.Qc7 Rhg3 53.
Qxh7 Rd3+ 54.Ke6 Rge3+ 55.Kf5 Ke8 56.f7+ Ke7 57.Qg8 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Ligterink, Gert"]
[Black "Torre, Eugenio"]
[WhiteElo "2440"]
[BlackElo "2520"]
[Result "0-1"]
[ECO "B09"]
[EventDate "1979.07.11"]
[PlyCount "80"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Nf3 O-O 6.Bd3 Na6 7.O-O c5 8.d5 b6 9.
Qe1 Nb4 10.Qh4 b5 11.a3 Nxd3 12.cxd3 b4 13.axb4 cxb4 14.Nd1 Bg4 15.Be3 
Bxf3 16.Rxf3 Qc8 17.Bd4 Qc2 18.f5 Rac8 19.fxg6 fxg6 20.Ne3 Qe2 21.Qf2 
Qxf2+ 22.Rxf2 Rc7 23.Rc2 Rfc8 24.Rxc7 Rxc7 25.Bxa7 Nd7 26.d4 Kf7 27.Kf1 
Ke8 28.Ke2 Bh6 29.Ng4 Bc1 30.Bc5 h5 31.Nf2 Bxb2 32.Ra8+ Kf7 33.Bxb4 Rc2+ 
34.Kf3 Bxd4 35.Nd3 g5 36.h3 Nf6 37.Ra6 g4+ 38.hxg4 hxg4+ 39.Kg3 Re2 40.Nf4
Be5 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Sax, Gyula"]
[Black "Byrne, Robert"]
[WhiteElo "2590"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "C45"]
[EventDate "1979.07.11"]
[PlyCount "70"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.Qd4 d5 7.Nc3 Be7 8.
exd5 O-O 9.Bf4 cxd5 10.O-O-O c5 11.Qe5 Be6 12.Bd3 c4 13.Be2 Qa5 14.Qc7 
Qxc7 15.Bxc7 Bc5 16.Be5 Ne4 17.Nxe4 dxe4 18.Bd6 Rfc8 19.Bxc5 Rxc5 20.Rd4 
f5 21.f3 exf3 22.Bxf3 Re8 23.Re1 Kf8 24.Kd2 c3+ 25.bxc3 Bxa2 26.Ra1 Be6 
27.Rxa7 Re7 28.Rxe7 Kxe7 29.Kd3 Kf6 30.c4 Ke5 31.Bd5 Bxd5 32.Rxd5+ Rxd5+ 
33.cxd5 Kxd5 34.h4 g6 35.Ke3 h6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Smejkal, Jan"]
[Black "Ree, Hans"]
[WhiteElo "2560"]
[BlackElo "2480"]
[Result "1/2-1/2"]
[ECO "A21"]
[EventDate "1979.07.11"]
[PlyCount "36"]

1.c4 e5 2.Nc3 d6 3.g3 g6 4.d4 exd4 5.Qxd4 Nf6 6.Bg5 Bg7 7.Nd5 Nbd7 8.Qe3+ 
Kf8 9.Bh3 h6 10.Bxf6 Nxf6 11.Bxc8 Rxc8 12.Nf3 Nxd5 13.cxd5 c5 14.dxc6 Qa5+
15.Qd2 Qxd2+ 16.Kxd2 bxc6 17.Rab1 Ke7 18.Rhc1 Kd7 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.19"]
[Round "7"]
[White "Stean, Michael Francis"]
[Black "Andersson, Ulf"]
[WhiteElo "2540"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1979.07.11"]
[PlyCount "44"]

1.c4 Nf6 2.Nc3 c5 3.g3 e6 4.Nf3 b6 5.Bg2 Bb7 6.d4 cxd4 7.Qxd4 Nc6 8.Qf4 
Bb4 9.Bd2 O-O 10.O-O Be7 11.Rfd1 a6 12.e4 d6 13.Qe3 Ra7 14.Qe2 Qb8 15.Be3 
Ba8 16.Nd2 Rc8 17.Rab1 Nd7 18.b4 Rb7 19.f4 Na7 20.Rdc1 Rbc7 21.Qd3 h6 22.
Ne2 Nf6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Byrne, Robert"]
[Black "Farago, Ivan"]
[WhiteElo "2535"]
[BlackElo "2510"]
[Result "1-0"]
[ECO "C19"]
[EventDate "1979.07.11"]
[PlyCount "101"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.a3 Bxc3+ 6.bxc3 c5 7.Nf3 Bd7 8.Bd3 
Ba4 9.O-O c4 10.Be2 Nbc6 11.Ng5 h6 12.Nh3 Qa5 13.Bd2 O-O-O 14.Nf4 g6 15.
Re1 a6 16.Bf1 Rdg8 17.Re3 Nf5 18.Rf3 Qd8 19.g4 Nh4 20.Rg3 h5 21.f3 Qe7 22.
Nh3 hxg4 23.fxg4 g5 24.Qc1 f6 25.exf6 Qxf6 26.Be2 Qg6 27.Bxg5 Bxc2 28.Qe3 
Be4 29.Rf1 Ng2 30.Rxg2 Bxg2 31.Kxg2 Rxh3 32.Kxh3 Qxg5 33.Qxg5 Rxg5 34.Kg3 
b5 35.h4 Rg8 36.g5 a5 37.Bg4 Kd7 38.Rf6 Nd8 39.Rf1 b4 40.axb4 axb4 41.cxb4
Nc6 42.b5 Nxd4 43.Rd1 Nxb5 44.Rxd5+ Nd6 45.Re5 Rg6 46.Kf4 Nf7 47.Rc5 Ke7 
48.Bh5 Rg7 49.Bxf7 Rxf7+ 50.Kg4 Rf1 51.Rxc4 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Donner, Jan"]
[Black "Sax, Gyula"]
[WhiteElo "2465"]
[BlackElo "2590"]
[Result "0-1"]
[ECO "E60"]
[EventDate "1979.07.11"]
[PlyCount "50"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.O-O Nc6 7.d5 Na5 8.Nfd2 c5 
9.Na3 e6 10.Rb1 exd5 11.cxd5 a6 12.Nc2 Bd7 13.b3 Rc8 14.h3 Re8 15.Re1 c4 
16.bxc4 Nxc4 17.Rb4 Nb6 18.Rd4 Na4 19.Nb1 Qb6 20.Be3 Qb2 21.Nca3 Nc3 22.
Nxc3 Qxa3 23.Nb1 Qxa2 24.Bf4 Nh5 25.Rd2 Qa1 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Ree, Hans"]
[Black "Andersson, Ulf"]
[WhiteElo "2480"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "E32"]
[EventDate "1979.07.11"]
[PlyCount "98"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 b6 5.e4 c5 6.e5 cxd4 7.a3 Bf8 8.Nb5 Ng8 
9.Nxd4 Bb7 10.Ngf3 a6 11.Be2 Ne7 12.Bf4 Qc7 13.Bg3 Nbc6 14.O-O Rc8 15.Rac1
Nxd4 16.Nxd4 Ng6 17.f4 Be7 18.Nf3 O-O 19.f5 exf5 20.Qxf5 d6 21.exd6 Bxd6 
22.Bxd6 Qxd6 23.Rcd1 Qf4 24.Nd2 Qc7 25.Nf3 Nf4 26.Bd3 g6 27.Qf6 Nxd3 28.
Rxd3 Qxc4 29.Ne5 Qe4 30.Rdf3 Qd4+ 31.R3f2 Rc7 32.h4 Re8 33.Nxf7 Qxf6 34.
Rxf6 Re2 35.Nh6+ Kg7 36.Rf7+ Rxf7 37.Rxf7+ Kxh6 38.Rxb7 Rxb2 39.g4 Rb3 40.
g5+ Kh5 41.Rxh7+ Kg4 42.a4 Rb4 43.Rg7 Kxh4 44.Rxg6 a5 45.Kf2 Kh5 46.Rc6 
Kxg5 47.Ke3 Kf5 48.Kd3 Ke5 49.Rc3 Rd4+ 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Sahovic, Dragutin"]
[Black "Stean, Michael Francis"]
[WhiteElo "2520"]
[BlackElo "2540"]
[Result "1/2-1/2"]
[ECO "D90"]
[EventDate "1979.07.11"]
[PlyCount "23"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.g3 dxc4 6.Qa4+ Nfd7 7.Qxc4 Nb6 8.Qd3
Nc6 9.d5 Nb8 10.Bf4 O-O 11.Rd1 c6 12.e4 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Smejkal, Jan"]
[Black "Hort, Vlastimil"]
[WhiteElo "2560"]
[BlackElo "2600"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1979.07.11"]
[PlyCount "27"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 7.O-O Be7 8.a3 
O-O 9.b4 a6 10.d3 Be6 11.Be3 Nd5 12.Nxd5 Bxd5 13.Rc1 Qe8 14.Bc5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Sosonko, Gennadi"]
[Black "Ligterink, Gert"]
[WhiteElo "2535"]
[BlackElo "2440"]
[Result "1/2-1/2"]
[ECO "E97"]
[EventDate "1979.07.11"]
[PlyCount "35"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 
9.b4 a5 10.bxa5 c5 11.Nd2 Qxa5 12.Nb5 Qd8 13.Bb2 Ne8 14.a4 Bh6 15.Ra3 f5 
16.exf5 gxf5 17.Bh5 Nf6 18.Be2 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.20"]
[Round "8"]
[White "Torre, Eugenio"]
[Black "Lein, Anatoly"]
[WhiteElo "2520"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "B98"]
[EventDate "1979.07.11"]
[PlyCount "48"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.O-O-O Nc6 10.Nxc6 Qxc6 11.Be2 Bd7 12.Qd3 Rd8 13.Kb1 Qc7 14.Qg3 Bc6 15.
Bd3 h6 16.Bh4 O-O 17.Rhe1 d5 18.Bxf6 Bxf6 19.e5 Be7 20.Ne2 Qb6 21.c3 Ba4 
22.Rd2 Bc5 23.Nd4 Bxd4 24.cxd4 Qb4 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Andersson, Ulf"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2560"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "A25"]
[EventDate "1979.07.11"]
[PlyCount "68"]

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Nh6 7.b3 O-O 8.Bb2 f5 
9.Nd5 Ne7 10.f4 c6 11.Ndc3 Be6 12.O-O Nf7 13.Rb1 Rb8 14.d4 Bd7 15.Qd2 e4 
16.d5 c5 17.g4 Nc8 18.gxf5 gxf5 19.Ng3 Qh4 20.Rf2 Ne7 21.Bf1 Ng6 22.Be2 
Nh6 23.Kh1 Ng4 24.Bxg4 Qxg4 25.Rg1 Qh4 26.Nb1 Bxb2 27.Qxb2 b5 28.Nd2 b4 
29.a4 Kf7 30.Qa1 Ke7 31.Qd1 Rf7 32.Rfg2 Qf6 33.Nh5 Qc3 34.Qe1 Kd8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Farago, Ivan"]
[Black "Donner, Jan"]
[WhiteElo "2510"]
[BlackElo "2465"]
[Result "0-1"]
[ECO "D10"]
[EventDate "1979.07.11"]
[PlyCount "76"]

1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nf6 5.Bf4 Nc6 6.e3 e6 7.Bd3 Bd6 8.Bxd6 
Qxd6 9.f4 O-O 10.Nf3 Ne8 11.O-O f5 12.Bb5 Bd7 13.Ne5 Nf6 14.Rc1 Rfc8 15.
Bxc6 Bxc6 16.Rf2 Rc7 17.h3 Rac8 18.Rfc2 a6 19.Kh2 h6 20.Qd3 Qd8 21.a3 Be8 
22.b4 Qd6 23.Nb1 Ne4 24.Qb3 Kh7 25.Nc3 Nxc3 26.Rxc3 Qd8 27.R3c2 Rxc2 28.
Rxc2 Rc7 29.a4 Qc8 30.Rc5 b6 31.Rxc7 Qxc7 32.Qa3 Qc2 33.a5 bxa5 34.bxa5 
Bb5 35.Kg1 Qd1+ 36.Kf2 Qd2+ 37.Kg1 Qe1+ 38.Kh2 Qf2 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Hort, Vlastimil"]
[Black "Ree, Hans"]
[WhiteElo "2600"]
[BlackElo "2480"]
[Result "1-0"]
[ECO "B85"]
[EventDate "1979.07.11"]
[PlyCount "83"]

1.e4 c5 2.Nc3 Nc6 3.Nge2 d6 4.d4 cxd4 5.Nxd4 e6 6.Be3 Nf6 7.Be2 Be7 8.O-O 
O-O 9.f4 a6 10.Qe1 Bd7 11.Nb3 b5 12.Bf3 Qc7 13.g4 Bc8 14.g5 Nd7 15.a4 bxa4
16.Nxa4 Rb8 17.Rf2 Nb4 18.Qd1 Bb7 19.c3 Nc6 20.h4 Rfd8 21.Qf1 d5 22.exd5 
exd5 23.Qg2 Na5 24.Nxa5 Qxa5 25.f5 Bc6 26.f6 Bf8 27.b4 Qc7 28.Bd4 g6 29.h5
Ne5 30.Nc5 Bxc5 31.bxc5 Nd3 32.Rd2 Nf4 33.Qh2 gxh5 34.Bxh5 Re8 35.Bxf7+ 
Qxf7 36.Qxf4 Qg6 37.Rxa6 Rb1+ 38.Kf2 Bb5 39.f7+ Qxf7 40.Qxf7+ Kxf7 41.Rf6+
Kg8 42.Kg3 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Lein, Anatoly"]
[Black "Sosonko, Gennadi"]
[WhiteElo "2535"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "A36"]
[EventDate "1979.07.11"]
[PlyCount "58"]

1.c4 c5 2.g3 g6 3.Bg2 Bg7 4.Nc3 Nc6 5.d3 Nf6 6.Bg5 d6 7.Qd2 h6 8.Bxf6 Bxf6
9.f4 Bd7 10.Nf3 a6 11.O-O Rb8 12.Rac1 b5 13.b3 Bg7 14.e3 O-O 15.h3 b4 16.
Ne2 e5 17.Kh2 Re8 18.fxe5 dxe5 19.Ne1 Ne7 20.Nc2 h5 21.Rcd1 Bh6 22.Qe1 Bf5
23.Qf2 Qa5 24.Nc1 Rbd8 25.Qe2 Qc7 26.e4 Be6 27.Ne3 Bxe3 28.Qxe3 Kg7 29.Rf2
f6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Ligterink, Gert"]
[Black "Byrne, Robert"]
[WhiteElo "2440"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "C84"]
[EventDate "1979.07.11"]
[PlyCount "62"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4 6.O-O Be7 7.Re1 b5 8.e5 
Nxe5 9.Rxe5 d6 10.Re1 bxa4 11.Nxd4 Bd7 12.Qf3 O-O 13.Nc6 Bxc6 14.Qxc6 Re8 
15.Nc3 Qd7 16.Qxd7 Nxd7 17.Nxa4 Nf8 18.c4 Ne6 19.Be3 Bf6 20.Rad1 Nd4 21.
Bxd4 Bxd4 22.Rxe8+ Rxe8 23.Kf1 Re4 24.f3 Rf4 25.Ke2 Be5 26.b3 Rh4 27.h3 
Kf8 28.c5 Rh6 29.cxd6 Bxd6 30.Kd3 Re6 31.Rd2 Re1 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Sax, Gyula"]
[Black "Smejkal, Jan"]
[WhiteElo "2590"]
[BlackElo "2560"]
[Result "1-0"]
[ECO "C84"]
[EventDate "1979.07.11"]
[PlyCount "73"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4 6.O-O Be7 7.Re1 b5 8.e5 
Nxe5 9.Rxe5 d6 10.Re1 bxa4 11.Nxd4 Bd7 12.Qf3 O-O 13.Nc6 Bxc6 14.Qxc6 Nd7 
15.Nc3 Bf6 16.Bd2 a3 17.b3 Bd4 18.Rad1 Ne5 19.Qa4 Qf6 20.Ne4 Qg6 21.Ng5 
Bb6 22.Qe4 h6 23.Nh3 Rae8 24.Bc3 Qxe4 25.Rxe4 f5 26.Ra4 Ng4 27.Ba5 Bc5 28.
b4 Ba7 29.Bxc7 Re2 30.Rf1 Rxc2 31.Bxd6 Rf6 32.Rxa6 Bb8 33.Ra8 Rxd6 34.
Rxb8+ Kh7 35.Nf4 Rxa2 36.h3 Nf6 37.Rc1 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.21"]
[Round "9"]
[White "Stean, Michael Francis"]
[Black "Torre, Eugenio"]
[WhiteElo "2540"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "D85"]
[EventDate "1979.07.11"]
[PlyCount "60"]

1.c4 g6 2.Nf3 Bg7 3.d4 Nf6 4.Nc3 d5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 c5 8.Bb5+
Bd7 9.Rb1 O-O 10.O-O Qc7 11.Be2 Bg4 12.Be3 Nd7 13.h3 Bxf3 14.Bxf3 Rab8 15.
Qa4 b6 16.Rfd1 Rfd8 17.g3 e5 18.d5 Nf6 19.c4 Ne8 20.Qc2 Nd6 21.Bg2 Re8 22.
a4 f5 23.Re1 Qf7 24.a5 Rf8 25.axb6 axb6 26.Rb3 Rb7 27.Reb1 Rfb8 28.Bd2 Qd7
29.Ra3 Ra7 30.Rba1 Rba8 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Byrne, Robert"]
[Black "Lein, Anatoly"]
[WhiteElo "2535"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "C99"]
[EventDate "1979.07.11"]
[PlyCount "46"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 
9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4 13.cxd4 Nc6 14.a3 exd4 15.Nb3 d3
16.Bxd3 Ne5 17.Nxe5 dxe5 18.Be3 Be6 19.Rc1 Qd7 20.Nc5 Bxc5 21.Rxc5 Rfd8 
22.Bc2 Qb7 23.Qb1 Nd7 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Donner, Jan"]
[Black "Ligterink, Gert"]
[WhiteElo "2465"]
[BlackElo "2440"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1979.07.11"]
[PlyCount "78"]

1.d4 g6 2.c4 Bg7 3.Nf3 Nf6 4.g3 O-O 5.Bg2 d6 6.O-O Nc6 7.d5 Na5 8.Nfd2 c5 
9.Nc3 a6 10.Qc2 Rb8 11.b3 b5 12.Bb2 Bh6 13.cxb5 axb5 14.e4 b4 15.Nd1 Qb6 
16.Re1 Ba6 17.h3 Rbc8 18.Ne3 Bxe3 19.Rxe3 c4 20.bxc4 Nxc4 21.Nxc4 Rxc4 22.
Qd2 Rfc8 23.a3 bxa3 24.Bxf6 exf6 25.Rexa3 Bb7 26.g4 Rc2 27.Qf4 Qd4 28.Rf1 
Qb4 29.Rf3 R2c7 30.Ra1 Qd4 31.Rb1 Ba6 32.Ra3 Bd3 33.Rd1 Rc3 34.Rxc3 Qxc3 
35.Qxd6 Qc2 36.Re1 Qd2 37.Ra1 Qb2 38.Ra7 Qb1+ 39.Kh2 Rf8 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Hort, Vlastimil"]
[Black "Sax, Gyula"]
[WhiteElo "2600"]
[BlackElo "2590"]
[Result "1/2-1/2"]
[ECO "B23"]
[EventDate "1979.07.11"]
[PlyCount "29"]

1.e4 c5 2.Nc3 e6 3.g3 d5 4.d3 dxe4 5.dxe4 Qxd1+ 6.Nxd1 Nc6 7.Ne3 b6 8.Bd2 
Bb7 9.f3 O-O-O 10.Nh3 g6 11.O-O-O Bg7 12.Bg2 Nf6 13.f4 Nd4 14.Nf2 e5 15.f5
1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Ree, Hans"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2480"]
[BlackElo "2520"]
[Result "0-1"]
[ECO "D06"]
[EventDate "1979.07.11"]
[PlyCount "74"]

1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.cxd5 exd5 5.Qb3 Nc6 6.Nf3 Bb4 7.a3 Bxc3+ 8.
Qxc3 Nf6 9.Bg5 O-O 10.e3 h6 11.Bxf6 Qxf6 12.Be2 Rfc8 13.O-O Ne7 14.Rfc1 c6
15.b4 Ng6 16.Ne1 Re8 17.a4 Re6 18.b5 Rae8 19.Qa5 Qe7 20.Bd3 b6 21.Qc3 Bxd3
22.Nxd3 cxb5 23.axb5 Qd7 24.Qb3 Rf6 25.Rc2 Nh4 26.Ne5 Qf5 27.Rxa7 Nxg2 28.
Rac7 Nh4 29.f4 Qe4 30.Rc8 Re6 31.Rxe8+ Rxe8 32.Re2 Ra8 33.Qd1 Nf5 34.Qd3 
Ra1+ 35.Kf2 Qh1 36.Rc2 Rf1+ 37.Ke2 Qg2# 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Smejkal, Jan"]
[Black "Farago, Ivan"]
[WhiteElo "2560"]
[BlackElo "2510"]
[Result "0-1"]
[ECO "D11"]
[EventDate "1979.07.11"]
[PlyCount "176"]

1.c4 Nf6 2.Nf3 c6 3.g3 d5 4.b3 Bg4 5.Bg2 e6 6.Bb2 Nbd7 7.O-O Bd6 8.d4 O-O 
9.Nbd2 Qe7 10.Ne5 Bf5 11.Qc1 Rac8 12.a3 c5 13.Nxd7 Nxd7 14.dxc5 Nxc5 15.
Qc3 f6 16.Qe3 dxc4 17.Nxc4 Bb8 18.Rac1 b6 19.b4 Na4 20.Ba1 Rc7 21.Qb3 Rfc8
22.b5 Nc5 23.Qb4 Kf8 24.Ne3 Bg6 25.Rc4 Rd7 26.Bc3 Bd6 27.Qb2 Rdc7 28.Bb4 
Be8 29.Bd2 Nd7 30.Rxc7 Rxc7 31.a4 Be5 32.Qb1 Bg6 33.Qa2 Bd4 34.a5 Ne5 35.
Qa4 Bc5 36.axb6 axb6 37.Ra1 Be8 38.Qb3 Kf7 39.h3 Qd7 40.Qa2 Qxb5 41.Kf1 
Bc6 42.Qc2 Bd4 43.Bxc6 Qxc6 44.Qxc6 Nxc6 45.Rc1 Bc5 46.Nc4 Ke7 47.Bf4 e5 
48.Be3 Nd4 49.Rb1 Rc6 50.Nb2 Nb3 51.Na4 Nd4 52.Nxc5 bxc5 53.Rb7+ Kf8 54.
Ke1 Nf5 55.Bc1 c4 56.g4 Nd4 57.e3 Nf3+ 58.Ke2 e4 59.Ba3+ Kg8 60.Rb8+ Kf7 
61.Rb7+ Ke6 62.Re7+ Kd5 63.Rd7+ Ke5 64.Re7+ Re6 65.Rxg7 Ra6 66.Re7+ Kd5 
67.Rd7+ Kc6 68.Rd6+ Kb5 69.Rxa6 Kxa6 70.Kd1 Kb5 71.Kc2 Ng5 72.Be7 Nxh3 73.
Bxf6 Nxf2 74.g5 Kc5 75.Kc3 Kd5 76.Bd4 Nh3 77.Bf6 Ng1 78.Bd8 Nf3 79.Kb4 Nh4
80.Bb6 Nf5 81.Kc3 Nd6 82.Bd8 Ke6 83.Kd4 Nf7 84.Bf6 Kf5 85.Be7 Nxg5 86.Kxc4
Nf3 87.Kd5 h5 88.Bd6 h4 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Sosonko, Gennadi"]
[Black "Stean, Michael Francis"]
[WhiteElo "2535"]
[BlackElo "2540"]
[Result "1/2-1/2"]
[ECO "E05"]
[EventDate "1979.07.11"]
[PlyCount "39"]

1.d4 e6 2.c4 Nf6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O dxc4 7.Qc2 a6 8.Qxc4 b5
9.Qc2 Bb7 10.Bd2 Be4 11.Qc1 Qc8 12.a4 Nc6 13.Nc3 Bxf3 14.Bxf3 Nxd4 15.Bxa8
Qxa8 16.axb5 Nb3 17.Qc2 Nxa1 18.Rxa1 a5 19.Nb1 Qd5 20.Rxa5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.23"]
[Round "10"]
[White "Torre, Eugenio"]
[Black "Andersson, Ulf"]
[WhiteElo "2520"]
[BlackElo "2560"]
[Result "1/2-1/2"]
[ECO "B83"]
[EventDate "1979.07.11"]
[PlyCount "34"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Be7 7.O-O O-O 8.f4 
Nc6 9.Be3 Qc7 10.Kh1 Nxd4 11.Qxd4 a6 12.a4 e5 13.Qd3 exf4 14.Bxf4 Be6 15.
Qg3 Rfd8 16.Rad1 Ne8 17.e5 dxe5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Andersson, Ulf"]
[Black "Sosonko, Gennadi"]
[WhiteElo "2560"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1979.07.11"]
[PlyCount "40"]

1.c4 c5 2.Nf3 Nc6 3.b3 Nf6 4.Bb2 e6 5.e3 Be7 6.Be2 O-O 7.d4 cxd4 8.Nxd4 
Qa5+ 9.Qd2 Qxd2+ 10.Nxd2 Nxd4 11.Bxd4 b6 12.Bf3 Rb8 13.O-O-O Rd8 14.Kb2 
Ba6 15.e4 Bb7 16.e5 Ne8 17.Bxb7 Rxb7 18.Ne4 d5 19.exd6 Nxd6 20.Nxd6 Rxd6 
1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Farago, Ivan"]
[Black "Hort, Vlastimil"]
[WhiteElo "2510"]
[BlackElo "2600"]
[Result "1/2-1/2"]
[ECO "E12"]
[EventDate "1979.07.11"]
[PlyCount "75"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 exd5 7.Bf4 Be7 8.Rc1 c6
9.e3 O-O 10.Be2 c5 11.O-O Nc6 12.Ne5 c4 13.Bf3 Na5 14.Qc2 a6 15.Rcd1 b5 
16.Bg5 Ra7 17.Qf5 Bc8 18.Qf4 Be6 19.h3 Re8 20.e4 Nh5 21.Bxh5 Bxg5 22.Qh2 
dxe4 23.Nxe4 Bd5 24.Nxg5 Qxg5 25.Bf3 Qd8 26.Bxd5 Qxd5 27.Ng4 Rd7 28.Qg3 
Qd6 29.Rfe1 Red8 30.Qf3 Qd5 31.Qg3 Qd6 32.Qc3 Nc6 33.d5 Ne7 34.Ne5 Rc7 35.
Qf3 Rf8 36.Qg3 Rd8 37.Qf3 Rf8 38.Qg3 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Lein, Anatoly"]
[Black "Donner, Jan"]
[WhiteElo "2535"]
[BlackElo "2465"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1979.07.11"]
[PlyCount "89"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.g3 Bg7 5.Bg2 O-O 6.Nge2 e5 7.O-O c6 8.h3 a5 9.
Be3 Nfd7 10.Qd2 Re8 11.Rad1 Qc7 12.f4 exd4 13.Bxd4 Bf8 14.g4 b5 15.Ng3 b4 
16.Nce2 c5 17.Be3 Bb7 18.g5 Nb6 19.b3 N8d7 20.f5 Ne5 21.Nf4 Rad8 22.Qf2 
Bc8 23.Bc1 Bg7 24.Rfe1 Nc6 25.f6 Bf8 26.Bb2 Bd7 27.Nf1 a4 28.Ne3 Be6 29.
Ned5 Bxd5 30.Nxd5 Nxd5 31.exd5 Na7 32.Bf1 Qd7 33.bxa4 Qxa4 34.Bc4 Rxe1+ 
35.Rxe1 Re8 36.Re6 Qd7 37.Qe2 Rb8 38.Kh2 Nc8 39.Re8 Qf5 40.Bc1 Qd7 41.Bf4 
Rb6 42.Kg3 Rb8 43.h4 Rb6 44.h5 Rb8 45.hxg6 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Ligterink, Gert"]
[Black "Smejkal, Jan"]
[WhiteElo "2440"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "C91"]
[EventDate "1979.07.11"]
[PlyCount "70"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 
9.d4 Bg4 10.d5 Na5 11.Bc2 Qc8 12.h3 Bd7 13.Nbd2 c6 14.dxc6 Qxc6 15.Nf1 
Rfe8 16.Ng3 Nc4 17.Nf5 Bxf5 18.exf5 Bf8 19.a4 Rab8 20.Ra2 h6 21.axb5 axb5 
22.Nh2 d5 23.Ng4 Nxg4 24.Qxg4 Ra8 25.Rxa8 Rxa8 26.b3 Na3 27.Bxa3 Rxa3 28.
Rxe5 Qxc3 29.Re8 Ra1+ 30.Kh2 Qc6 31.Qe2 Qc7+ 32.g3 Ra2 33.f6 Qxc2 34.fxg7 
Kxg7 35.Qg4+ Kh7 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Sahovic, Dragutin"]
[Black "Torre, Eugenio"]
[WhiteElo "2520"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "D91"]
[EventDate "1979.07.11"]
[PlyCount "80"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 Ne4 6.cxd5 Nxg5 7.Nxg5 e6 8.Qd2 
exd5 9.Qe3+ Kf8 10.Qf4 Bf6 11.h4 h6 12.Nf3 Kg7 13.O-O-O Be6 14.e3 Nd7 15.
Bd3 c6 16.g4 Qb8 17.Rdg1 h5 18.Qxb8 Raxb8 19.gxh5 Rxh5 20.Ng5 Bxg5 21.hxg5
Rbh8 22.Rxh5 Rxh5 23.Kd2 Nb6 24.Ne2 Rh2 25.Ke1 Nc8 26.Nf4 Bd7 27.b4 a6 28.
Ke2 Nd6 29.a4 Rh8 30.b5 axb5 31.axb5 Ra8 32.bxc6 Ra2+ 33.Kf3 bxc6 34.Rc1 
Kf8 35.Rh1 Kg7 36.Rb1 Kf8 37.Rb8+ Ke7 38.Rh8 Rd2 39.Rh7 Kf8 40.Rh8+ Ke7 
1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Sax, Gyula"]
[Black "Ree, Hans"]
[WhiteElo "2590"]
[BlackElo "2480"]
[Result "1-0"]
[ECO "C02"]
[EventDate "1979.07.11"]
[PlyCount "85"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 c4 7.g3 Na5 8.Nbd2 Bd7 9.
h4 h5 10.Bh3 Nh6 11.O-O Be7 12.Ne1 g6 13.Ng2 O-O-O 14.Rb1 Kb8 15.Nf3 Qb3 
16.Qe2 Ba4 17.Bg5 Bxg5 18.Nxg5 Qc2 19.Qf3 Nb3 20.Qf4 Nd2 21.Rfc1 Qd3 22.
Rd1 Nxb1 23.Rxd3 cxd3 24.Nf3 d2 25.Nxd2 Nxd2 26.Qxd2 Nf5 27.Qg5 Bc2 28.Qf6
Rdf8 29.Nf4 Kc7 30.c4 Nxd4 31.cxd5 Bf5 32.Bg2 Kb8 33.Qe7 exd5 34.Nxd5 Ne6 
35.Qd6+ Ka8 36.Qb4 Rc8 37.Nc3 Nd8 38.Nb5 Rc1+ 39.Kh2 Nc6 40.Qf4 Rc5 41.
Nc7+ Kb8 42.e6 Kc8 43.Qd6 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.24"]
[Round "11"]
[White "Stean, Michael Francis"]
[Black "Byrne, Robert"]
[WhiteElo "2540"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "E05"]
[EventDate "1979.07.11"]
[PlyCount "50"]

1.c4 e6 2.g3 d5 3.Bg2 Nf6 4.Nf3 Be7 5.O-O O-O 6.d4 dxc4 7.Qc2 a6 8.Qxc4 b5
9.Qc2 Bb7 10.Bd2 Nc6 11.e3 Nb4 12.Bxb4 Bxb4 13.a3 Bd6 14.Nbd2 Qe7 15.e4 e5
16.Nh4 Nd7 17.Nf5 Qd8 18.Nb3 g6 19.Na5 Rb8 20.dxe5 Bxe5 21.f4 gxf5 22.fxe5
Nxe5 23.Rad1 Qe7 24.Nxb7 Rxb7 25.exf5 Rb6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Byrne, Robert"]
[Black "Andersson, Ulf"]
[WhiteElo "2535"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "B42"]
[EventDate "1979.07.11"]
[PlyCount "82"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6 6.b3 d6 7.O-O Bg7 8.Bb2 Nf6 
9.c4 O-O 10.Nc3 Nbd7 11.Re1 Re8 12.Bf1 b6 13.Qd2 Bb7 14.Rad1 Qc7 15.f3 
Rad8 16.Qf2 Ne5 17.Rc1 d5 18.exd5 Nfg4 19.Qg3 Nxf3+ 20.gxf3 Bxd4+ 21.Kh1 
Qxg3 22.hxg3 Ne3 23.Bd3 exd5 24.cxd5 Nxd5 25.Rxe8+ Rxe8 26.Be4 Bxc3 27.
Bxc3 Nxc3 28.Bxb7 Nxa2 29.Rc6 a5 30.Rxb6 Rb8 31.Kg2 Kf8 32.Rb5 Nb4 33.Kf2 
Ke7 34.Ke3 Kd6 35.Kd4 Kc7 36.Rxb4 axb4 37.Bd5 Kd6 38.Bxf7 Rf8 39.Bd5 Rf5 
40.Be4 Rg5 41.g4 h5 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Donner, Jan"]
[Black "Stean, Michael Francis"]
[WhiteElo "2465"]
[BlackElo "2540"]
[Result "1/2-1/2"]
[ECO "E45"]
[EventDate "1979.07.11"]
[PlyCount "85"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6 6.a3 Be7 7.Nf4 d5 8.Qf3 c6 9.
b3 Qc8 10.e4 dxe4 11.Nxe4 Nbd7 12.Nxf6+ Nxf6 13.Bb2 Bb7 14.Bd3 Qc7 15.O-O 
O-O-O 16.Rfd1 c5 17.d5 Bd6 18.g3 h5 19.Bf1 h4 20.Bg2 hxg3 21.hxg3 Rde8 22.
Ne2 Kb8 23.Nc3 a6 24.Re1 exd5 25.Nxd5 Nxd5 26.cxd5 f6 27.Re3 Re7 28.Rae1 
Rhe8 29.Bc1 Rxe3 30.Rxe3 Re5 31.Rxe5 Bxe5 32.a4 Qd6 33.Qd3 Qd7 34.Be3 Bd6 
35.Qc2 Qe7 36.Qc4 Bxg3 37.a5 bxa5 38.Bxc5 Bd6 39.Bxd6+ Qxd6 40.Qa4 Qb4 41.
Qe8+ Bc8 42.Bh3 Qc3 43.Be6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Hort, Vlastimil"]
[Black "Ligterink, Gert"]
[WhiteElo "2600"]
[BlackElo "2440"]
[Result "1/2-1/2"]
[ECO "E74"]
[EventDate "1979.07.11"]
[PlyCount "33"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5 h6 8.Be3 e6 9.
Qd2 exd5 10.exd5 Kh7 11.h3 Re8 12.Bd3 Na6 13.Nge2 Nd7 14.f4 Nb4 15.O-O 
Nxd3 16.Qxd3 Nf6 17.Rae1 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Ree, Hans"]
[Black "Torre, Eugenio"]
[WhiteElo "2480"]
[BlackElo "2520"]
[Result "1/2-1/2"]
[ECO "E90"]
[EventDate "1979.07.11"]
[PlyCount "39"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 Bg7 5.e4 d6 6.Bd3 O-O 7.h3 e6 8.Nf3 exd5 9.
exd5 Re8+ 10.Be3 Bh6 11.O-O Bxe3 12.fxe3 Nbd7 13.Qd2 Kg7 14.e4 Ne5 15.Nxe5
Rxe5 16.Rf2 Ng8 17.Raf1 f6 18.a3 Bd7 19.b4 Rc8 20.Rb1 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Sax, Gyula"]
[Black "Farago, Ivan"]
[WhiteElo "2590"]
[BlackElo "2510"]
[Result "1/2-1/2"]
[ECO "C00"]
[EventDate "1979.07.11"]
[PlyCount "25"]

1.e4 e6 2.b3 d5 3.Bb2 c5 4.e5 Nc6 5.f4 Nh6 6.Nf3 Be7 7.g3 O-O 8.Bg2 f6 9.
O-O fxe5 10.Nxe5 Nxe5 11.Bxe5 Nf7 12.Bb2 d4 13.Qh5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Smejkal, Jan"]
[Black "Lein, Anatoly"]
[WhiteElo "2560"]
[BlackElo "2535"]
[Result "1-0"]
[ECO "E05"]
[EventDate "1979.07.11"]
[PlyCount "171"]

1.c4 e6 2.g3 Nf6 3.Bg2 d5 4.d4 Be7 5.Nf3 O-O 6.O-O dxc4 7.Qc2 a6 8.Qxc4 b5
9.Qc2 Bb7 10.Bd2 Be4 11.Qc1 Qc8 12.a4 Nbd7 13.Nc3 Bc6 14.Bg5 Bd6 15.Nxb5 
Qb7 16.Nxd6 cxd6 17.b4 Be4 18.Qa3 Nd5 19.Bd2 N5b6 20.Rfc1 d5 21.Be1 Nc4 
22.Qb3 Rab8 23.Bf1 Qb6 24.Ng5 Bg6 25.e3 Qb7 26.Nf3 h6 27.Nd2 Ndb6 28.Nf3 
Nd7 29.Qd1 Rfc8 30.Nd2 Nxd2 31.Bxd2 Nb6 32.Rc5 Nc4 33.Be1 Qd7 34.Qb3 Rc7 
35.Rc1 Rcb7 36.Bg2 Nd6 37.Rc6 Ra7 38.Bf1 Nc4 39.Rc5 Kh7 40.Be2 Qe7 41.f3 
f6 42.Bxc4 dxc4 43.Qxc4 e5 44.Rc7 Rxc7 45.Qxc7 Qxc7 46.Rxc7 exd4 47.exd4 
Be8 48.b5 axb5 49.a5 b4 50.a6 b3 51.a7 Ra8 52.Bc3 Kg6 53.d5 Bf7 54.d6 Bd5 
55.Kf2 Rd8 56.d7 Kf7 57.Rc5 Bb7 58.Rb5 Bc6 59.Rb6 Bd5 60.Rb8 Ke7 61.Ke3 
Kxd7 62.f4 Rc8 63.Kd4 Ba8 64.f5 h5 65.Bb4 b2 66.Bc5 Re8 67.Rxb2 Re4+ 68.
Kd3 Re5 69.Rb8 Bh1 70.Bd4 Rxf5 71.a8=Q Bxa8 72.Rxa8 Ke7 73.Ke4 Rg5 74.Ra7+
Kf8 75.Be3 Re5+ 76.Kf4 Kg8 77.Rc7 Ra5 78.Rc5 Ra4+ 79.Kf3 h4 80.g4 Ra2 81.
g5 fxg5 82.h3 Rh2 83.Kg4 Rg2+ 84.Kh5 g4 85.hxg4 Kf7 86.Rc7+ 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.25"]
[Round "12"]
[White "Sosonko, Gennadi"]
[Black "Sahovic, Dragutin"]
[WhiteElo "2535"]
[BlackElo "2520"]
[Result "1-0"]
[ECO "A40"]
[EventDate "1979.07.11"]
[PlyCount "119"]

1.d4 b5 2.e4 Bb7 3.Bd3 e6 4.Qe2 a6 5.Nf3 c5 6.c3 cxd4 7.cxd4 Be7 8.O-O Nf6
9.a4 b4 10.Bg5 h6 11.Bh4 Nh5 12.Bxe7 Qxe7 13.Qe3 O-O 14.Nbd2 Nc6 15.Rfc1 
Nf6 16.Nb3 Rfc8 17.Rc2 d6 18.Rac1 Nd8 19.Na5 Rxc2 20.Rxc2 Rc8 21.Rxc8 Bxc8
22.Qc1 Bb7 23.Nd2 Ne8 24.Ndb3 Qc7 25.Qxc7 Nxc7 26.e5 dxe5 27.dxe5 Bd5 28.
Nc5 Nc6 29.Nxc6 Bxc6 30.a5 Bb5 31.Bxb5 axb5 32.f4 Kf8 33.Kf2 Ke7 34.Ke3 
Kd8 35.Ke4 Kc8 36.f5 exf5+ 37.Kxf5 Nd5 38.Ke4 Ne7 39.a6 Kb8 40.Nd3 b3 41.
Kd4 Ka7 42.Nb4 Ng6 43.Kd5 h5 44.g3 h4 45.e6 hxg3 46.hxg3 Ne7+ 47.Ke5 Ng6+ 
48.Kf5 Ne7+ 49.Ke5 Ng6+ 50.Kd6 fxe6 51.Kxe6 Kb6 52.Nd3 Nf8+ 53.Kf7 Nh7 54.
Kxg7 Ng5 55.Nc5 Nh3 56.g4 Nf2 57.g5 Nd1 58.Nd3 Kxa6 59.g6 Ne3 60.Kf8 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Andersson, Ulf"]
[Black "Donner, Jan"]
[WhiteElo "2560"]
[BlackElo "2465"]
[Result "1-0"]
[ECO "D13"]
[EventDate "1979.07.11"]
[PlyCount "77"]

1.c4 c6 2.Nc3 d5 3.cxd5 cxd5 4.d4 Nc6 5.Nf3 Nf6 6.Bf4 e6 7.e3 Bd6 8.Bd3 
Bxf4 9.exf4 Qb6 10.a3 Bd7 11.Na4 Qc7 12.g3 O-O 13.O-O Rfc8 14.Rc1 Qd8 15.
Nc5 Rc7 16.Rc3 Rac8 17.Qc2 g6 18.Rc1 Be8 19.Qd2 Qe7 20.b4 Nb8 21.Ne5 b6 
22.Nb3 Ba4 23.Rxc7 Rxc7 24.Rxc7 Qxc7 25.Nc1 Ne4 26.Bxe4 dxe4 27.Ne2 f6 28.
Ng4 Qd8 29.Nc3 Bc6 30.d5 exd5 31.Qd4 Kg7 32.h4 Nd7 33.Nxd5 Bxd5 34.Qxd5 
Qe7 35.h5 gxh5 36.Ne3 Qe8 37.Nf5+ Kg6 38.Nd6 Qe7 39.Qg8+ 1-0

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Farago, Ivan"]
[Black "Ree, Hans"]
[WhiteElo "2510"]
[BlackElo "2480"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1979.07.11"]
[PlyCount "26"]

1.Nf3 Nf6 2.c4 b6 3.g3 Bb7 4.Bg2 c5 5.O-O g6 6.b3 Bg7 7.Bb2 O-O 8.Ne1 Bxg2
9.Nxg2 Nc6 10.Nc3 d5 11.Nxd5 Nxd5 12.Bxg7 Kxg7 13.cxd5 Qxd5 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Lein, Anatoly"]
[Black "Hort, Vlastimil"]
[WhiteElo "2535"]
[BlackElo "2600"]
[Result "0-1"]
[ECO "E14"]
[EventDate "1979.07.11"]
[PlyCount "78"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 Be7 6.O-O O-O 7.Nc3 d5 8.cxd5 
exd5 9.b3 Nbd7 10.Bb2 a6 11.Ne5 Bd6 12.f4 c5 13.Rf3 Re8 14.Rh3 Nf8 15.Na4 
Ng6 16.Rc1 Rc8 17.dxc5 bxc5 18.Ng4 d4 19.Nxf6+ Qxf6 20.Qh5 h6 21.Rf1 Bf8 
22.Rg3 Be4 23.Bc4 Nh4 24.Bxf7+ Qxf7 25.Qxh4 Bd3 26.Re1 Rxe3 27.Rexe3 dxe3 
28.Rxe3 c4 29.h3 Bb1 30.Kh2 Bxa2 31.Nb6 Rb8 32.Nxc4 Rxb3 33.Ne5 Qe7 34.
Rxb3 Qxh4 35.Ng6 Qh5 36.Rg3 Bf7 37.Nxf8 Kxf8 38.Bxg7+ Ke8 39.Re3+ Kd7 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Ligterink, Gert"]
[Black "Sax, Gyula"]
[WhiteElo "2440"]
[BlackElo "2590"]
[Result "1/2-1/2"]
[ECO "B85"]
[EventDate "1979.07.11"]
[PlyCount "36"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 a6 7.O-O Be7 8.f4 Qc7
9.Kh1 O-O 10.a4 Nc6 11.Be3 Rd8 12.Qe1 Nxd4 13.Bxd4 e5 14.Bg1 exf4 15.a5 
Re8 16.Bb6 Qb8 17.Rxf4 d5 18.Qf2 Be6 1/2-1/2

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Sahovic, Dragutin"]
[Black "Byrne, Robert"]
[WhiteElo "2520"]
[BlackElo "2535"]
[Result "0-1"]
[ECO "A00"]
[EventDate "1979.07.11"]
[PlyCount "0"]

0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Stean, Michael Francis"]
[Black "Smejkal, Jan"]
[WhiteElo "2540"]
[BlackElo "2560"]
[Result "0-1"]
[ECO "B38"]
[EventDate "1979.07.11"]
[PlyCount "114"]

1.c4 g6 2.e4 c5 3.Nf3 Bg7 4.d4 cxd4 5.Nxd4 Nc6 6.Be3 d6 7.Be2 Nf6 8.Nc3 
O-O 9.O-O Bd7 10.Rc1 a6 11.Nb3 b6 12.f3 Be6 13.Qd2 Ne5 14.Nd5 b5 15.Nd4 
Bd7 16.cxb5 axb5 17.a3 Nxd5 18.exd5 Qb8 19.f4 Nc4 20.Bxc4 bxc4 21.Rxc4 Qb7
22.Nc6 Bxc6 23.dxc6 Qxb2 24.Qxb2 Bxb2 25.c7 Bxa3 26.Ra1 Bc5 27.Rxa8 Rxa8 
28.Bxc5 dxc5 29.Rxc5 Rc8 30.h4 Kf8 31.h5 Ke8 32.hxg6 hxg6 33.g4 Kd7 34.Kf2
Rxc7 35.Rd5+ Ke6 36.Re5+ Kd6 37.Ra5 f6 38.Kf3 Rc3+ 39.Kf2 Rc5 40.Ra7 g5 
41.fxg5 fxg5 42.Kf3 Ke6 43.Ke4 Rc4+ 44.Kf3 Rc3+ 45.Ke4 Kf6 46.Ra6+ e6 47.
Ra8 Rg3 48.Rf8+ Ke7 49.Ra8 Rxg4+ 50.Ke5 Kf7 51.Ra7+ Kg6 52.Re7 Rg1 53.
Rxe6+ Kh5 54.Ra6 Re1+ 55.Kf5 Rf1+ 56.Ke4 g4 57.Ra8 g3 0-1

[Event "19th IBM tournament"]
[Site "Amsterdam NED"]
[Date "1979.07.27"]
[Round "13"]
[White "Torre, Eugenio"]
[Black "Sosonko, Gennadi"]
[WhiteElo "2520"]
[BlackElo "2535"]
[Result "1/2-1/2"]
[ECO "E18"]
[EventDate "1979.07.11"]
[PlyCount "23"]

1.d4 Nf6 2.Nf3 b6 3.c4 e6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Nxe4 
Bxe4 9.Nh4 Bxg2 10.Nxg2 d5 11.Qa4 Qe8 12.Qxe8 1/2-1/2

