[Event "Praia da Rocha zt"] [Site "Praia da Rocha"] [Date "1969.10.20"] [Round "6"] [White "Svetozar Gligoric"] [Black "William Hartston"] [Result "1/2-1/2"] [ECO "D85"] [Opening "Gruenfeld: Exchange, 5.e4"] 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 O-O 10.O-O Qc7 11.Rc1 Rd8 12.Qe1 Qa5 13.Rd1 cxd4 14.cxd4 Qxe1 15.Rfxe1 b6 16.Bb5 Bd7 17.d5 Ne5 18.Nd4 Bxb5 19.Nxb5 Rd7 20.f4 Nc4 21.Bf2 a6 22.Nd4 b5 23.Nc6 Nb2 24.Rb1 Nd3 25.Red1 Nxf4 26.Kf1 g5 27.Be3 h6 28.Bxf4 gxf4 29.Ke2 e5 30.Kf3 Kh7 31.g3 fxg3 32.hxg3 h5 33.Rh1 Kg6 34.Rbg1 Kg5 35.Rh4 Rh8 36.Rgh1 f5 37.Rd1 Rf8 38.Rdh1 Rh8 39.exf5 Rxd5 40.g4 hxg4+ 41.Rxg4+ Kxf5 42.Ne7+ Ke6 43.Rxh8 Bxh8 44.Nxd5 Kxd5 45.Rg8 e4+ 46.Ke2 Bc3 47.Rd8+ Kc4 48.Ke3 Kb4 49.Kxe4 Ka3 50.Kd3 Bb4 51.Kc2 Kxa2 52.Ra8 a5 53.Rb8 Ka3 54.Rxb5 Ka4 55.Rb7 Ka3 56.Rd7 Ka4 57.Rd5 Ka3 58.Rh5 Ka4 59.Kb2 Be1 60.Re5 Bd2 61.Kc2 Bb4 62.Rf5 Be1 63.Kd3 Kb3 64.Rf1 Bc3 65.Rc1 Bb2 66.Rc8 a4 67.Rb8+ Ka2 {#d} 1/2-1/2