[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Hartoch, Robert G"]
[Result "1-0"]
[WhiteElo "2560"]
[BlackElo "2400"]
[ECO "E91"]

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

