[Event "USSR Championship"] [Site "Moscow (RUS)"] [Date "1957.02.11"] [Round "15"] [White "Viktor Korchnoi"] [Black "Isaac Boleslavsky"] [Result "1-0"] [ECO "E70"] [Opening "King's Indian: 4.e4 d6"] 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 c5 8.Qd2 Ne8 9.Bd3 f5 10.exf5 gxf5 11.O-O-O a6 12.Nge2 b5 13.Rdg1 Nd7 14.cxb5 e4 15.fxe4 fxe4 16.Nxe4 axb5 17.Bxb5 Rxa2 18.N2c3 Ra7 19.Rf1 Ndf6 20.Nxf6+ Nxf6 21.Kc2 Ng4 22.Bg5 Rxf1 23.Rxf1 Qb6 24.Qe2 Ne5 25.Qh5 Rf7 26.Rxf7 Nxf7 27.Bd3 Nxg5 28.Qe8+ Bf8 29.Qxc8 c4 30.Be2 Qb3+ 31.Kb1 Nf7 32.Qxc4 Qb6 33.Qg4+ Bg7 34.Kc2 Qd8 35.Ne4 Qc7+ 36.Kb1 Qb6 37.Bb5 Qd4 38.Qc8+ Bf8 39.Qc4 Qg1+ 40.Qf1 Qxh2 41.Nf6+ Kg7 42.Ne8+ Kg8 43.Nf6+ Kg7 44.Bd3 Be7 45.Ne8+ Kg8 46.Bf5 Ne5 47.Be6+ Kh8 48.Nxd6 Qh4 49.Qa6 Bxd6 50.Qxd6 Qe4+ 51.Ka1 Kg7 52.g4 Qf4 53.Qc7+ Kh6 54.Bf5 Qd4 55.Qxh7+ Kg5 56.Qh5+ Kf4 57.Qh2+ Kg5 58.Qh5+ Kf4 59.Qh6+ Kg3 60.Qd6 Kh4 61.Ka2 Nc4 62.Qb4 Kg5 63.d6 Qd5 64.d7 Ne3+ 65.b3 Nxf5 66.gxf5 Qxd7 67.Qc5 Qb7 68.b4 Qa6+ 69.Kb2 Qe2+ 70.Kc3 Qe1+ 71.Kb3 Qd1+ 72.Kc4 Qe2+ 73.Kd4 Qg4+ 74.Kd5 Qg2+ 75.Kd6 {#r} 1-0