In this position (from a game Moldoyarov-Samochanov, 1974), White found himself struggling for a draw after 1.Rxa5 Kg3. Would you, without the hint, have spotted a chance to win the game?
What he missed was 1.Rg6! a4 (1...Be2 2.Ke3 Bg4 3.Kf4 a4 4.Rd6 a3 5.Rd3 leads to a similar finish) 2.Ke3 a3 3.Kf4 a2 4.Rg3 Be6 (to stop Rh3 mate) 5.Rh3+! Bxh3 6.g3 mate.