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Wiktionary

absolute pin

English

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 a b c d e f g h  
8 {{{square}}} black rook {{{square}}} black king      8
7        7
6    {{{square}}} black knight    6
5     {{{square}}} white bishop   5
4 {{{square}}} white knight       4
3        3
2        2
1 {{{square}}} white queen  {{{square}}} white king     1
 a b c d e f g h  
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

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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

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Further reading

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