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Chess Tactic Terms Explained

Tactics are the explosive moments of chess, but describing them requires a specific vocabulary. This glossary explains the essential tactical terms—such as Forks, Pins, Skewers, and Deflections—with clear definitions and practical meaning. By learning the names of these patterns, you can categorize them in your mind, making it significantly easier to recognize the winning blow when it appears on the board.

• Fork

  One piece attacks two or more targets at once.

• Pin

  A piece cannot move (or shouldn’t) because it exposes something behind it.

• Skewer

  Attack a valuable piece first; when it moves, win what’s behind it.

• Discovered Attack

  Move one piece to reveal an attack by another.

• Discovered Check

  A discovered attack where the revealed line is check.

• Double Attack

  Two threats at once (forks are a common form).

• Deflection

  Force a key defender away from its duty.

• Decoy

  Lure an enemy piece onto a bad square.

• Overloading

  One defender has too many jobs — it can’t cope.

• Removing the Defender

  Eliminate a key defender to win material or mate.

• Interference

  Block coordination between enemy pieces.

• X-Ray Attack

  Attack “through” a piece using a long-range line.

• Zugzwang

  Any move worsens the position — being forced to move is the problem.

• Zwischenzug (Intermediate Move)

  An unexpected in-between move that changes the result.

• Clearance Sacrifice

  Vacate a square or open a line, often by sacrifice.

• Windmill

  Repeated discovered checks while harvesting material.

• Sacrifice

  Give material for attack, initiative, or a forced result.

• Greek Gift

  Classic Bxh7+/Bxh2+ sacrifice to rip open the king.

• Smothered Mate

  Knight mate with king trapped by its own pieces.

• Back-Rank Mate

  Mate on the back rank with no escape square.

• Scholar’s Mate

  Early mate threat on f7/f2 with queen + bishop.