Sacrifice Puzzle (Rated 1223): Spot Mate in 2 — Back Rank Mate

This middlegame puzzle is a classic example of a back rank mating net built around king safety and piece coordination. White’s heavy pieces are active, and the opponent’s king is boxed in by its own pawns and pieces, creating a tactical vulnerability on the back rank. The key idea is to force the king into a helpless position where a rook can deliver the final blow. Even when material is down, forcing checks can completely override static evaluation.