Cozio Defense Puzzle (Rated 1118): Win a Piece — Clearance
In the middlegame, material is usually won by spotting pieces that are defended only once. Here, in the Ruy Lopez Cozio Defense, White's knight has pushed deep into Black's kingside, eyeing f7 and h7. Aggressive as it looks, that knight is guarded by a single bishop — a guard that shares a diagonal with Black's queen. Capture the attacking knight, and the lone defender is forced to recapture; then the queen continues down the now-clear diagonal and wins it. The payoff is a full minor piece and a decisive advantage.