Smothered Mate In 3 Puzzle: Smothered Mate — Knight
A smothered mate happens when the defending king has no escape squares because its own pieces block the surrounding squares. The knight then delivers the final check, since a knight cannot be blocked or captured by the king in the usual way. In this position, White uses a forcing check to drive the king toward the corner, then creates a decoy that makes the defender capture on a critical square. The final knight check completes the mating net.