Opposite Coloured Bishops – part 3

Continuing from part 2, Let's look at some typical ideas:

1) The strength of connected pawns

2) Distant passed pawns

3) Pawn weaknesses

4) Active king

5) Rule of one diagonal

(5) Smyslov Vassily (RUS) - Stein Leonid (UKR)
Ch URS Moscow (Russia), 1969

37.Bd4 ! Now White effectively has two extra pawns on the kingside. 37...a6 38.Kf4 Ke6 39.Kg5 Kf7 40.Kf4 Ke6 41.Bb6 Bb3 42.g4 hxg4 Diagram

43.Kxg4 ! 43...Bd1 44.Kf4 Kf7 45.Bd4 Kf8 46.Ke3 Kf7 47.Be5 Ke6 48.Bg3 Kf6 Black makes things harder for White by attacking the f3 pawn. 49.Bf4 Ke6 Diagram

50.h5!! gxh5 51.Bg3 White's plan now is very simple: f3-f4-f5, Kf4, Bh4, etc. Despite even material Black is helpless against the advance of the White pawns; sacrificing the bishop (as in theoretical position #3) would not work of course, as White has queenside pawns left. 1-0