Blackmar Diemer Gambit Accepted Sacrifice Puzzle (Rated 1037): Spot Mate in 3 — Back Rank Mate

This middlegame puzzle is a classic mating net built around king safety, piece coordination, and a forcing queen sacrifice. White’s queen and rook work together to exploit the exposed black king, while the defender’s heavy pieces are overloaded and unable to cover the escape squares. The position also shows how a seemingly active attacking piece can become the key to a forced finish when the opponent’s back rank is weak and the king has limited flight squares.