[Event "Siegen olm"]
[Site "Siegen"]
[Date "1970.??.??"]
[Round "18"]
[White "Portisch, Lajos"]
[Black "Fischer, Robert James"]
[Result "1/2-1/2"]
[ECO "E45"]
[Opening "Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation"]
[PlyCount "78"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6 6.Ng3 Bxc3+ 7.bxc3 d5 8.Ba3 dxc4 9.e4 Qd7 10.Be2 Nc6 11.Qc2 O-O-O 12.O-O h5 13.Rfd1 h4 14.Nf1 Nh5 15.d5 Ne5 16.dxe6 Qe8 17.Rxd8+ Qxd8 18.Bxh5 Rxh5 19.f4 Nd3 20.exf7 c5 21.Qe2 Rh8 22.e5 Kb8 23.e6 Qf6 24.Re1 Bb5 25.Bxc5 bxc5 26.Rb1 a6 27.a4 Nxf4 28.Qf3 Nxe6 29.Qxf6 gxf6 30.axb5 axb5 31.Rxb5+ Kc7 32.Ne3 Rf8 33.Ra5 Kb7 34.Nxc4 Rxf7 35.Rxc5 Nxc5 36.Nd6+ Kc6 37.Nxf7 Ne4 38.Nh6 Kd5 39.Nf5 h3 1/2-1/2