absolute pin

English

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There is an absolute pin on the black knight as moving it would illegally expose the black king to check from the white bishop.
There is a relative pin on the white knight as moving it would allow capture of the white queen by the black rook.

Noun

absolute pin (plural absolute pins)

  1. (chess) A pin in which moving away the pinned piece would illegally expose the king to check.

See also

Further reading

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