Learn How to Back Rank Mate: Pin Tactics
This puzzle is a classic middlegame mating net built around a pinned rook and a vulnerable king. White’s material edge looks comfortable, but the king’s shelter is compromised and the back rank is overloaded. Black’s active rook and bishop work together to restrict escape squares, turning a quiet-looking position into a forced finish. The key lesson is that material advantage does not matter if the enemy king is boxed in and your pieces control the only flight squares.