Learn How to Mate in 1: Back Rank Mate
This middlegame puzzle is a classic example of a mating net built around a pinned piece and an exposed king. White’s rook is active on the open file, and the black king has very limited flight squares because its own pieces and pawns restrict escape. The key idea is to recognize when a direct rook invasion creates an immediate checkmate rather than winning material first. In tactical positions like this, king safety outweighs material count.