In last week's improvement tip we looked at bishop and rook pawn of the wrong colour. Here's some further knowledge from Averbakh:
The diagram on the left shows another 'drawing-trick', because of the unfortunate position of the bishop, White can make no progress. The diagram on the right though, shows how bishop of the wrong colour can sometimes create a win; a clever manouevre by the Bishop keeps the Black king away from the corner, and allows the pawn to queen:
1 Be6! Ke7; 2 h6! Kf6
(the bishop is immune, as capturing allows the pawn to queen)
3 Bf5! Kf7; 4 Bh7! Kf6; 5 Kf4 Kf7; 6 Kg5 Kf8; 7 Kf6 Ke8; 8 Kg7 etc.
Back in 1984, in his column in the short lived Chess Express, John Nunn showed an ending from Paulsen - Metger, Nuremburg 1888 that combines both of the above themes. Paulsen played wrongly and only drew: