Ruy Lopez Exchange Puzzle (Rated 1389): Punish a Hanging Queen
Decisive middlegame combinations are often built from the cheapest pieces: a pawn snapping off a queen that strayed onto an attacked square. Here Black's most valuable piece stands on a square a white pawn already controls, with no safe retreat and no defender. One simple push wins the game outright, leaving White with a decisive material advantage. The defender answers with an aggressive-looking check, but a calm, precise response meets it while preserving the decisive material edge. Recognizing when a heavy piece has run out of squares separates an inaccuracy from a losing mistake.