[Event "IBM"]
[Site "Amsterdam"]
[Date "1963.??.??"]
[Round "8"]
[White "Langeweg, Kick"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E12"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5 8.Be5 f6
9.Qc2 fxe5 10.Qg6+ Ke7 11.Qxh5 exd4 12.Nxd4 Bg7 13.e3 Nc6 14.O-O-O Nxd4 15.exd4 Qf8
16.Rd2 Qf4 17.Qd1 Raf8 18.f3 h5 19.Be2 g4 20.Kb1 gxf3 21.Bxf3 Bxf3 22.gxf3 Qxf3
23.Re2 Bxd4  0-1

