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Absolute pin
An absolute pin is a pin against the king. The pinned piece cannot legally move because doing so would expose the king to check. Unlike a relative pin, an absolute pin cannot be broken by moving the pinned piece — the only ways to relieve it are to move the king, interpose a piece, or capture the pinning piece.
Example
- →A bishop on c3 pins a knight on e5 against a king on g7 — the knight is absolutely pinned.
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