A decoy lures an enemy piece, most often the king, onto a specific square, usually with a sacrifice it can’t refuse. Once drawn onto that square, the piece becomes vulnerable to another attack: a fork, a mate, or a material gain.

An example: luring the king to g8

1.Qg8+! The queen sacrifices itself: the black king, boxed in by its own pawns, has no legal move except to capture it on g8.

In this position, the black king is boxed in by its own g7 and h7 pawns: the only neighboring squares are g8, g7, and h7, and g7/h7 are already occupied. When White’s queen lands on g8 with check, the king therefore has only one legal move: Kxg8. The queen sacrifices itself, but it has just lured the king exactly where another white piece ready to strike (a rook swinging to the back rank, or a knight ready to jump in) could deliver the finishing blow. That’s the whole idea of a decoy: force the king off its safe square and onto a precise, pre-chosen one.

Decoy and deflection

A decoy is the mirror image of deflection: deflection pushes a defensive piece away from its post, while a decoy lures an enemy piece (often the king) toward a chosen square where it becomes exploitable. Both motifs rest on the same idea, forcing a precise move from the opponent, but in opposite directions.

How to spot a decoy

Look for squares where the enemy king would become vulnerable: close to a mating square, within reach of a knight fork, or lined up with one of your long-range pieces. If you can force the king (or any other piece) onto that square with a sacrifice or check it can’t refuse, a decoy becomes possible.

Sacrificing the queen is the most spectacular tool, but sometimes a simple pawn or a minor piece is enough to lure a piece onto the right square. Before sacrificing, always check that a piece is ready to immediately exploit the new position of the lured target.

Frequently asked questions

Does a decoy always work through a check?

Not necessarily, but it’s the most reliable method. A check limits the opponent’s possible replies to a minimum number of legal moves, which guarantees the lured piece really does land on the intended square rather than somewhere else.

What’s the difference between a decoy and a fork?

A decoy is often the setup for a fork, not its equivalent. You first lure a piece onto a precise square, then exploit its new position with a fork, a mate, or another material gain; the decoy is the first step of the combination.

Does a decoy always involve sacrificing a piece?

Very often, yes, because forcing an enemy piece to move generally means offering it a capture it can’t refuse. But the sacrifice only makes sense if the combination that follows nets more than the material invested.