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Discovered Attack

Move one piece to unleash another — two threats for the price of one.

Any position with a blocked line of attack

Key Positions

The knight on f3 blocks the queen's view of d4 — moving it unleashes an attack

Discovered attack: moving the e5 knight reveals the bishop's attack on f7

Discovered check: moving a piece that reveals a check is the strongest form

Plans

Pattern Recognition

  • Discovered attacks create two threats simultaneously — the opponent can only deal with one.
  • The most powerful form is a discovered check, where the uncovered piece gives check while the moved piece attacks elsewhere.
  • Set up discoveries by placing a long-range piece (bishop, rook, queen) behind a mobile piece (knight, pawn).
  • Even a 'free' discovery with a pawn move can win material if the uncovered attack hits a high-value target.

How to Execute

  • Watch for enemy pieces lined up on the same file, rank, or diagonal — a discovery may be lurking.
  • Avoid placing your queen on the same line as an enemy bishop or rook with only one piece between them.
  • When you spot a potential discovery, move the target piece or block the uncovered line.
  • Remember: the moved piece doesn't need to make a good move — it just needs to get out of the way.

Key Principle

A discovered attack is like opening a curtain — the piece that moves is a distraction, while the real threat comes from behind. Two threats, one response.

Test Your Knowledge

Question 1 of 3

What makes a discovered attack so powerful?