[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Kortschnoj, Viktor"]
[Result "1/2-1/2"]
[WhiteElo "2560"]
[BlackElo "2670"]
[ECO "A34"]

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

