Kill Box Mate Beginner Puzzle (Rated 1008): Spot a Kill Box Mate — Mate in 1

This puzzle is a classic chess endgame tactic where the enemy king is boxed in by its own pieces and pawns, creating a tiny escape area. In these positions, the winning idea is often a direct queen or rook check that uses the king’s limited mobility. The key is not material, but king safety: when the king has no flight squares, even a single forcing move can end the game immediately.