Learn How to Spot Back Rank Mate: Queen Sacrifice
This middlegame puzzle is a classic example of a back rank mate pattern, where the enemy king is boxed in by its own pawns and has no safe flight square. The key idea is that White uses a forcing queen sacrifice to drag a defender away and open the c-file for a decisive rook finish. Even though Black is materially ahead, king safety overrides material when the back rank is vulnerable.