What Is a Pin in Chess (And How to Use It)

A pin happens when a piece can't move without exposing something more valuable behind it. The pinned piece is effectively frozen — even though it's still on the board, it can't do its job.

Absolute vs. relative pins

An absolute pin involves the king — the pinned piece legally cannot move, since doing so would put its own king in check. This is a hard restriction, not a suggestion.

A relative pin involves any other valuable piece behind the pinned one, like a queen. The piece can legally move, but doing so loses material, so it usually won't.

Why pins matter

A pinned piece is a piece that isn't defending, isn't attacking, and isn't doing anything — it's dead weight until the pin is broken. Strong players actively look for ways to pin an opponent's piece just to neutralize it, even without an immediate follow-up attack.

Turning a pin into a win

The real power of a pin shows up when you add a second attacker. A bishop pinning a knight to the king means that knight can't move — so if you attack it again with a pawn or another piece, it often just falls, since it has no way to escape or trade.

Spotting pins in your own games

Before moving a piece, it's worth asking: is anything valuable directly behind this piece, on the same line? If so, moving it might create — or fall into — a pin.