Learn How to Spot Mate in 1: Pillsbury's Mate
This puzzle is a classic mate in 1 built around a mating net against a king with limited flight squares. The key idea is that one active rook can deliver a direct checkmate because the enemy king is boxed in by its own pieces and pawns. In middlegame positions like this, material can matter far less than immediate tactics, especially when a back-rank or file-based weakness appears. Always ask whether a forcing move ends the game instantly.