[Event "IBM"]
[Site "Amsterdam"]
[Date "1977.??.??"]
[Round "4"]
[White "Donner, Jan Hein"]
[Black "Kavalek, Lubomir"]
[Result "0-1"]
[WhiteElo "2470"]
[BlackElo "2545"]
[ECO "E69"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nbd7 7.O-O e5 8.e4 c6
9.h3 Re8 10.d5 Nc5 11.Re1 a5 12.Bf1 a4 13.Rb1 cxd5 14.cxd5 Bd7 15.b4 axb3
16.axb3 Qb8 17.Nd2 Rc8 18.Qf3 b5 19.b4 Na4 20.Nxa4 Rxa4 21.Rb3 Ra1 22.Nb1 Nxe4
23.Qxe4 Bf5 24.Qe2 Bxb1 25.Be3 Ra2 26.Qxb5 Qxb5 27.Bxb5 Bc2 28.Rc1 e4 29.h4 Bb2
30.Rxb2 Rxb2 31.Ba6 Ra8 32.b5 Bd3 33.Rc6 Bxb5 34.Bxb5 Rxb5 35.Rxd6 Kf8 36.Bg5 Ke8
37.g4 Rba5 38.Kg2 R5a6 39.Rxa6 Rxa6 40.Kg3 Kd7 41.Kf4 f6 42.Bh6 Ra2 43.Kxe4 Rxf2
44.Bf4 Rf1 45.Bg3 Rg1 46.Kf3 Rxg3+ 47.Kxg3 Kd6 48.Kf4 Kxd5 49.h5 Kd4  0-1

