[Event "Las Palmas"] [Site "Las Palmas"] [Round "0"] [White "Lajos Portisch"] [Black "Kenneth Rogoff"] [Result "0-1"] [ECO "E47"] [Opening "Nimzo-Indian: 4.e3 O-O 5.Bd3"] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 b6 7.O-O Bb7 8.cxd5 exd5 9.Ne5 Nbd7 10.f4 c5 11.Bf5 g6 12.Bh3 Bxc3 13.bxc3 Nxe5 14.dxe5 Ne4 15.Qc2 Ba6 16.Rd1 Qh4 17.c4 Bxc4 18.Bb2 b5 19.Bd7 Rad8 20.e6 Qe7 21.exf7+ Rxf7 22.Bh3 Re8 23.g3 Nxg3 24.Re1 Qe4 25.Qxe4 Nxe4 26.a3 g5 27.Be5 Nf2 28.Kxf2 Rxe5 29.Kf3 d4 30.exd4 Rxf4+ 31.Kg3 Rxe1 32.Rxe1 Rxd4 33.Re5 h6 34.Bf5 Kg7 35.Rxc5 Kf6 36.Bc2 Rd2 37.Bh7 Ra2 38.Rc6+ Ke5 39.Ra6 b4 40.Ra5+ Kd4 41.axb4 Rxa5 42.bxa5 Kc5 43.Be4 Kb5 44.Kg4 Be6+ 45.Kh5 Kxa5 46.Kxh6 g4 47.Kg5 Kb4 48.Kf6 Bc8 49.Ke5 a5 50.Kd4 Be6 51.Ke3 Kb3 52.Kd2 Kb2 53.Bc6 Bb3 {#R} 0-1