[Event "Sydafrika"] [Site "Sydafrika"] [Round "0"] [White "Viktor Korchnoi"] [Black "Wolfgang Unzicker"] [Result "1-0"] [ECO "A18"] [Opening "English: Mikenas, French, 4.cxd5"] 1.c4 Nf6 2.Nc3 e6 3.e4 d5 4.cxd5 exd5 5.e5 Ne4 6.Nf3 Nc6 7.Bb5 Nxc3 8.dxc3 Be7 9.Nd4 Bd7 10.Nxc6 bxc6 11.Bd3 O-O 12.Qc2 h6 13.Be3 f5 14.f4 c5 15.c4 d4 16.Bd2 Be6 17.O-O-O Qd7 18.Rdf1 Rf7 19.g4 Raf8 20.gxf5 Bxf5 21.Rhg1 Bxd3 22.Qxd3 Qf5 23.Kc2 g5 24.h4 Kh7 25.hxg5 hxg5 26.Rg2 Kg6 27.Rh1 Rh7 28.Rxh7 Kxh7 29.fxg5 Kg6 30.Rh2 Qxd3+ 31.Kxd3 Kf5 32.b4 cxb4 33.Rf2+ Ke6 34.Rxf8 Bxf8 35.Kxd4 c5+ 36.Ke4 a5 37.Be3 a4 38.g6 a3 39.g7 Bxg7 40.Bxc5 Bxe5 41.Bxb4 Bb2 42.Kd3 Ke5 43.Bc5 Bc1 44.Kc3 Ke4 45.Kb4 Kd3 46.Bd6 Kc2 47.c5 Be3 48.c6 Bb6 49.Kb5 Bd8 50.Bxa3 {#r} 1-0