In this position from a game between Lev Polugaevsky and Larry Evans,[1] the rook on the seventh rank enables White to draw, despite being a pawn down (Griffiths 1992:102–3).
A famous 1960 game between future world champions Boris Spassky and Bobby Fischer began with a King's Gambit opening.
(Fischer 2008:123) Possession of the bishop pair often yields long-term compensation for sacrificed material.
White is up the exchange, while Black is compensated by two active bishops forming a crisscross pattern.
Opposite-colored bishops sometimes give the defender drawing chances in the long run, even if the opponent has a material advantage of one or two pawns or even the exchange.