[Event "IBM"]
[Site "Amsterdam"]
[Date "1974.??.??"]
[Round "5"]
[White "Ribli, Zoltan"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]
[WhiteElo "2525"]
[BlackElo "2495"]
[ECO "A11"]

1.c4 Nf6 2.g3 c6 3.Bg2 d5 4.b3 dxc4 5.bxc4 Qd4 6.Nc3 Qxc4 7.Ba3 Qa6 8.Qc1 Nbd7
9.Nf3 e6 10.Bxf8 Nxf8 11.a4 N8d7 12.a5 O-O 13.O-O Qc4 14.d4 Qb4 15.a6 bxa6
16.Na4 Rb8 17.Ne5 Nxe5 18.dxe5 Nd5  1/2-1/2

