Learn How to Corner Mate: Checkmate in 1
This puzzle is a classic corner mate: the king is boxed in by its own pieces and the final check lands on a square that leaves no escape. In practical terms, the key is to notice when a seemingly active position is actually one move away from mate because the defender’s king has no flight squares and no piece can interpose or capture the attacker. These are the kinds of tactical finishes that appear in sharp middlegame positions and in many chess quiz problems.