Vienna Game Hanging Piece Puzzle (Rated 1139): Spot a Mate in 1 — Corner Mate

This middlegame puzzle is a classic example of a corner mate: the enemy king is boxed in near the edge, and one active piece can deliver immediate checkmate by exploiting the limited escape squares. White’s pieces are harmonized around the kingside, with the knight and bishop creating a direct tactical net. The position also features a hanging piece and a clear kingside attack, so the winning idea is not about slow maneuvering but about recognizing the forced finish before the opponent can respond.