[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "10"]
[White "Portisch, Lajos"]
[Black "Langeweg, Kick"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E56"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 Nc6
9.a3 Ba5 10.Bd3 Qe7 11.Ne4 cxd4 12.b4 Bb6 13.b5 Nb8 14.Nxf6+ Qxf6 15.exd4 h6
16.Bb2 Nd7 17.Bb1 Rd8 18.Qc2 Nf8 19.Re1 Ba5 20.Re3 Bd7 21.Qe2 Rac8 22.Be4 Rc7
23.d5 Bc3 24.Rc1  1-0

