[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "4"]
[White "Enklaar, Bertus F"]
[Black "Petrosian, Tigran V"]
[Result "0-1"]
[WhiteElo "2445"]
[BlackElo "2640"]
[ECO "B81"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 h6 7.h3 a6 8.Bg2 Bd7
9.O-O Nc6 10.Be3 Qc7 11.Qe2 Be7 12.Rad1 b5 13.a3 Nxd4 14.Bxd4 e5 15.Be3 Be6
16.Nd5 Bxd5 17.exd5 Nd7 18.c3 O-O 19.Be4 Bg5 20.Bb1 Rae8 21.a4 bxa4 22.Qc2 g6
23.Qxa4 a5 24.Qe4 Kg7 25.Kg2 Rb8 26.Rd2 Nc5 27.Qc4 Bxe3 28.fxe3 a4 29.Qe2 Qe7
30.Qf3 Rb3 31.Ba2 Rb7 32.Bc4 Rfb8 33.Rff2 Rh8 34.Kh2 h5 35.Rg2 hxg4 36.Rxg4 Rh4
37.Rf2 Rxg4 38.Qxg4 Rb8 39.h4 Rh8 40.Kg3 Rh5 41.e4 Nd7 42.Be2 Nf6 43.Qf3 Rh8
44.Rh2 Qa7 45.Rh1 Nh5+ 46.Kg2 Qb6 47.Rb1 a3 48.b4 Nf4+ 49.Kg3 a2 50.Rh1 Qa7
51.Ra1 Qe7  0-1

