A Fork is a double attack where a single piece attacks two or more of the opponent's pieces at the same time. Because the opponent can usually only save one piece per turn, you are guaranteed to capture the other!
The Knight's Specialty: While any piece can perform a fork, the Knight is the most famous for it. Because Knights can jump over other pieces, they can sneak into the heart of the enemy camp and attack multiple targets without being easily blocked.
The Royal Fork: This is the most feared type of fork. It happens when you attack both the King and the Queen at the same time. Since the opponent is legally forced to move their King out of check, they have no choice but to let you capture their Queen on the very next move.
Pawn Forks: Pawns are excellent for forking pieces that are more valuable than themselves. If a pawn attacks two minor pieces like a Bishop and a Knight, the opponent has to lose one of them.
Setting the Trap: To create a fork, look for pieces that are sitting on the same color squares or pieces that are unprotected. By calculating one or two moves ahead, you can often lure an opponent's piece onto a square where it becomes vulnerable to a double attack.
Advanced forking involves using a sacrifice to lure a piece onto a specific square. For instance, you might sacrifice a Bishop to pull the enemy King onto a square where your Knight can then deliver a devastating fork. Mastering this requires seeing the geometry of the board and recognizing which squares are naturally connected by a Knight's leap.
In the endgame, the threat of a fork can be as powerful as the fork itself. By positioning your pieces to potentially double-attack the opponent's King and remaining pawns, you can force them into a defensive posture, allowing you to improve your position or promote your own pawns while they are busy avoiding the trap.