Tactic

What Is a Discovered Attack in Chess?

A discovered attack is when moving one piece unveils an attack from a long-range piece behind it.

Definition

A discovered attack happens when you move a piece that was blocking your own bishop, rook or queen, suddenly unleashing that piece's attack on a target. What makes discovered attacks so strong is that the piece that moves can create a second threat of its own — meaning one move produces two threats, and the opponent cannot answer both.

Example

A white knight on d5 stands between a rook on d1 and Black's queen on d8. Wherever that knight goes, the rook attacks the queen. If the knight also lands on a square where it attacks something — say c7, hitting a rook — Black loses material to one of the two threats.

How to spot it

  • Look for your own piece standing between one of your line pieces and an enemy target.
  • Ask where that blocking piece could go to create its own threat as it leaves.
  • The best discovered attacks move the front piece with check or a capture.
  • Check for enemy discoveries against you before committing to a capture.

The mistake most players make

Assuming a pawn push along a file reveals a piece behind it. A pawn moving straight forward stays on the same file, so it still blocks — a pawn only clears a file by capturing diagonally.

Frequently asked questions

What is a discovered attack in chess?

It is when you move one piece out of the way to unleash an attack from a bishop, rook or queen that was standing behind it. Because the moving piece can also create a threat, a discovered attack often produces two threats at once.

Why are discovered attacks so powerful?

Because one move creates two separate threats, and the opponent can normally only answer one per turn. The piece that moves away is temporarily immune to capture logic — it can go somewhere aggressive while the revealed attack does the real damage.

Related terms

  • Discovered check — A discovered check is a discovered attack where the unveiled piece gives check, forcing an immediate response.
  • Windmill — A windmill is a repeating cycle of discovered checks that harvests material with each turn of the wheel.
  • Fork — A fork is a single piece attacking two or more enemy pieces at the same time, so the opponent can only save one.
  • Battery — A battery is two or more long-range pieces stacked on the same line so their power combines.

Practise this pattern

Definitions stick once you have seen the pattern in a real game. Solve tactics puzzles to train recognition, review one of your games to find where it came up, or ask the coach to explain it in a position you are looking at.