Learn How to Spot Mate in 1: Queen Sacrifice
This chess endgame puzzle is a pure tactical finish: the side to move has a direct checkmate available because the enemy king is exposed and boxed in by its own pieces. In classical chess, these moments often come from king safety rather than material count. Even when one side is down heavily in material, a forcing move can override everything if the king has no escape squares, no blocking piece, and no useful capture to remove the threat.