♘f6+ ♔h6 ♖g6#

"Knight Fork"

1. ♘f6+ is a knight move that checks the opponent's king (♔h6).

2. ♖g6# is a rook move that delivers checkmate to the opponent's king, with the support of the knight.

 

In this sequence, the knight forks the king and some other critical square, forcing the opponent's king to move, and then the rook delivers the final blow, leading to checkmate.

Done