No squares left
A piece is only as safe as the squares it can flee to. If every way out is closed, by its own pieces, by the opponent's pawns or by squares that are guarded, the piece is trapped. Then a single attack is enough, and the piece is lost.
What makes the trick sneaky is that the piece often looks perfectly safe. Nobody is attacking it. But when the attack does come, there is nowhere to go.
The bishop that took a pawn at the edge
The classic example is a bishop that captures a pawn at the edge, for example on a2. There it has only two ways out, and a single pawn can close one of them.
The knight at the edge
A knight in the middle of the board reaches eight squares, one at the edge at most four. That is why the edge is dangerous. Guard just a few squares, and the knight has no retreat.
Even in the opening
Pieces can be trapped as early as the opening. In the Ruy Lopez there is a well-known trap where White's bishop on b3 is shut in by black pawns on a6, b5 and c4. The queen can get stuck too, if she sets out to grab pawns far from her own pieces. The pawns on b2 and b7 are famous for it, and a pawn like that is called a poisoned pawn.
How to avoid getting stuck
- Think about the way home. Before a piece captures a pawn at the edge, ask yourself how it will get back.
- Count the squares. A piece with only one way out can be shut in with a single move.
- Be careful at the edge, especially with the knight.
If the piece is already lost, it can often capture something before it goes. Read about the desperado.
Frequently asked questions
Which pieces get trapped most often?
Bishops and knights. A bishop that captures a pawn at the edge, for example on a2 or h7, can be shut in by a pawn. A knight at the edge has few squares and gets stuck easily.
How do you avoid getting trapped?
Ask yourself how the piece will get back before you send it out, especially when it captures a pawn at the edge. If the piece has only one way out, your opponent can close it.
What do you do if the piece is already trapped?
Try to sell it as dearly as possible. A piece that is lost anyway can often capture something on the way. That is called a desperado.
Updated October 31, 2026