[Event "URS-ch37"] [Site "Moscow"] [Date "1969.09.10"] [Round "4"] [White "Smyslov, Vassily"] [Black "Stein, Leonid"] [Result "1-0"] [ECO "D90"] [Annotator "peter"] [SetUp "1"] [FEN "8/1p6/pBp1k1p1/P6p/1P2PK1P/1b3P2/6P1/8 w - - 0 42"] [PlyCount "19"] [EventDate "1969.09.??"] [EventType "tourn"] [EventRounds "22"] [EventCountry "URS"] [SourceTitle "URS-ch"] [Source "ChessBase"] [SourceDate "1999.07.01"] [SourceVersion "1"] [SourceVersionDate "1999.07.01"] [SourceQuality "1"] 42. g4 hxg4 43. Kxg4 $1 (43. fxg4 {this quickly creates two split passers but is insufficient to win} Bd1 44. Kg5 Kf7 45. h5 gxh5 46. gxh5 Bf3 47. e5 Be4 { and Black can hold, aided by one of the passers being a rooks pawn, which gives White's king less room to penetrate.}) 43... Bd1 44. Kf4 Kf7 45. Bd4 (45. h5 {immediately would have won too since} g5+ {is met by} (45... gxh5 46. Bd8 { would be similar to the game}) 46. Kg4 {and White will follow up with Be3 and Bxg5}) 45... Kf8 46. Ke3 Kf7 47. Be5 Ke6 48. Bg3 Kf6 49. Bf4 Ke6 (49... Bb3 50. Bg5+ Ke6 51. h5 gxh5 52. f4) 50. h5 gxh5 51. Bg3 {White will advance his pawns, win the black bishop and mop up on the queenside} 1-0