Opposite colour bishop are notoriously drawish. Even in this position with connected passers, it’s a draw! As long as the pawns are on the same square colour as the bishop, the defender’s key ideas are to use his bishop to (a) tie the attacking king to the defence of a pawn so he can’t make progress with his king; (b) eventually sacrifice the bishop for the two pawns. If the pawns are on opposite squares, the plan is to (a) block the advance of the pawn in front with the king and (b) prevent the backward pawn from advancing with the bishop. Source: Jeremy Silman’s Complete Endgame Course.
Opposite Colour Bishops #1