The Knight fork is one of the most common chess tactics. Chess players should be careful to watch for N-forks on the board.
Check the below example (POSITION C) from a real Grandmaster game. Black to Play wins through a Knight Fork in 2 moves.
See a simple example below (POSITION A) where White to Play can win through a Knight Fork:
In another example below (POSITION B), White to Play again wins through a Knight Fork: