Chess Tactics Guide

A fork is when a single piece attacks two or more enemy pieces simultaneously. The opponent can only save one, so you win material. Knights are the most famous forking pieces because they attack in an L-shape pattern that is difficult to block.

Common Fork Patterns:

• Knight Fork: A knight attacks the king and queen simultaneously (called a "royal fork"). The king must move, and the queen is captured.
• Pawn Fork: A pawn advances diagonally to attack two pieces at once — one of the cheapest and most devastating tactics.
• Queen Fork: The queen attacks two pieces using its long-range movement. Common targets are undefended rooks and bishops.

To defend against forks: keep your pieces spread out, avoid having multiple pieces on the same rank or file within a knight's reach, and always check for knight squares before making your move.

A pin occurs when a long-range piece (bishop, rook, or queen) attacks an enemy piece that cannot move without exposing a more valuable piece behind it. The front piece is "pinned" and effectively paralyzed.

Types of Pins:

• Absolute Pin: The piece behind the pinned piece is the king. The pinned piece literally cannot move (it would be illegal).
• Relative Pin: The piece behind is a valuable piece (like a queen), not the king. The pinned piece can move, but doing so loses material.

Pins are especially dangerous when combined with attacks on the pinned piece — pile pressure with pawns and the knight cannot escape.

A skewer is the reverse of a pin. A long-range piece attacks a valuable piece, and when that piece moves, it exposes a less valuable piece behind it. Think of it as a pin where the higher-value piece is in front.

Example: A bishop gives check to the king, and when the king moves, the rook behind it is captured. Skewers are especially powerful in endgames with open diagonals and files.

A discovered attack happens when you move one piece, unveiling an attack from another piece behind it. This creates two simultaneous threats. A double check — where both pieces give check — is the most forcing move in chess. The only defense is to move the king.

Deflection forces an enemy piece away from a key defensive duty. By attacking a piece that is guarding something important, you force it to abandon its post, exposing what it was protecting.

A decoy lures an enemy piece to a specific square where it becomes vulnerable to a follow-up tactic. You "sacrifice" material to draw the opponent into a trap — among the most beautiful moves in chess.

An overloaded piece has too many defensive responsibilities. By creating a new threat, you force it to choose which duty to fulfill — and abandon the other.