[Event "Sousse Interzonal"]
[Site "Sousse"]
[Date "1967.??.??"]
[Round "20"]
[White "Kortschnoj, Viktor"]
[Black "Portisch, Lajos"]
[Result "1-0"]
[ECO "C91"]
[Opening "Ruy Lopez: Closed, Bogoljubow Variation"]
[PlyCount "139"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4 Bg4 10.Be3 exd4 11.cxd4 Na5 12.Bc2 Nc4 13.Bc1 c5 14.b3 Na5 15.d5 Nd7 16.Nbd2 Bf6 17.Rb1 Bc3 18.h3 Bxf3 19.Qxf3 Qf6 20.Re3 Bd4 21.Qxf6 Nxf6 22.Re2 Nd7 23.Nf3 Bc3 24.Bf4 Ne5 25.Nh4 g6 26.Bg3 Rfe8 27.f4 Nd7 28.Nf3 f6 29.Be1 Bxe1 30.Rbxe1 Rac8 31.g4 Nb7 32.Kf2 Nd8 33.h4 Nf7 34.g5 Kg7 35.Rg1 Rf8 36.Re3 Rce8 37.Nd2 Nd8 38.Rf3 Nf7 39.Rg2 Rh8 40.Nf1 Kf8 41.Ne3 Ke7 42.Ng4 fxg5 43.hxg5 h6 44.Nf6 Rd8 45.Nxd7 Rxd7 46.gxh6 Rxh6 47.Rfg3 Rh4 48.Ke3 g5 49.fxg5 Ne5 50.Bd1 Kf8 51.Bg4 Rd8 52.Be6 Kg7 53.Rf2 Rf8 54.Rf5 Rg4 55.Rxg4 Nxg4+ 56.Kf4 Ne5 57.Rxf8 Kxf8 58.Bc8 Ng6+ 59.Kf3 Ne5+ 60.Ke3 a5 61.Ba6 b4 62.Bb5 Kf7 63.Kf4 Kg7 64.Kf5 Kf7 65.Be2 a4 66.bxa4 c4 67.Bh5+ Kg7 68.Bd1 c3 69.Ke6 Nc4 70.a5 1-0