Ruy Lopez Exchange Variation Mate In 1 Puzzle (Rated 1155): Spot a Mate in 1 — Endgame Checkmate

This chess endgame puzzle is a pure tactical finish: one side’s king is exposed, and the active rook can deliver immediate checkmate. In positions like this, material balance matters less than king safety and piece coordination. The key idea is to look for forcing moves first, especially checks that also attack the king’s escape squares. Even in classical chess, a single well-placed rook can end the game instantly when the enemy king is boxed in.