What Is a Pin in Chess? (Explained Simply)
A pin is a line attack (from a rook, bishop, or queen) against a piece that cannot or should not move, because a more valuable piece stands directly behind it on the same line.
The strongest pin is against the king — moving the pinned piece would be illegal, so it is completely paralyzed. Pins against queens are devastating too: the defender effectively plays a piece down until the pin is resolved.
Pins win games slowly. The attacker piles more pieces onto the pinned piece, and eventually it falls or the pressure elsewhere collapses. Recognizing when your own pieces are pinned is just as important as creating pins.
Example position
White's rook on the first rank eyes the black bishop on b2... adjust: here the black bishop sits between White's heavy pieces and the white king's line — illustrating how a slider behind a target creates paralysis. The key idea: the piece on the line cannot move without exposing what is behind it.
Open this position in GameLens →How to create it
- ✓ Line up your rooks, bishops, and queens with enemy pieces standing in front of their king or queen.
- ✓ Open files and long diagonals make pins possible — trade pawns that block your best lines.
- ✓ Pin with a piece that is hard to attack; a distant bishop pinning along the whole diagonal is very stable.
- ✓ Once the pin exists, add attackers to the pinned piece faster than the defender can add defenders.
How to defend against it
- ✗ Keep your king off open lines shared by enemy rooks and bishops.
- ✗ Watch for enemy sliders suddenly gaining a long diagonal after a pawn trade.
- ✗ If one of your pieces gets pinned, break the pin immediately with pawn moves or counter-attack the pinner.
- ✗ Don't stack queen-in-front-of-king on the same file without escape squares.
Spot this pattern in YOUR games
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