Learn How to Spot Back Rank Mate: Mate in 3
This middlegame puzzle is a classic king-safety lesson: when the enemy king is boxed in by its own pieces and pawns, even a seemingly active position can collapse to a back rank mate. The key idea is to use forcing checks to drag the king into a worse square, then coordinate the queen and rook so the final line cannot be defended. In classical chess, these tactical refutations often appear after a sacrifice that opens files and removes the last defender.