[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.??.??"]
[Round "8"]
[White "Portisch, Lajos"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
[WhiteElo "2630"]
[BlackElo "2615"]
[ECO "E15"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Nbd2 Bb4 6.Qa4 c5 7.a3 Bxd2+ 8.Bxd2 Bb7
9.Bg2 O-O 10.O-O cxd4 11.Nxd4 Bxg2 12.Kxg2 Nc6 13.Nxc6 dxc6  1/2-1/2

