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Basic Tactics

The Pin - Absolute Pins

Examine the board below:

The White Knight is caught in an absolute pin. The Knight cannot legally move out of the pin (nor can it legally move at all, for that matter) because to do so would expose the White King to check by the Black Bishop.

Examine the board below:

The White Queen is caught in an absolute pin. The Queen cannot legally move out of the pin (say, by playing Qf3 or Qa6 ) because to do so would expose the White King to check by the Black Rook. However, the White Queen can move along the d-file (including capturing the Black Rook!), since such a move does not expose the White King to check.

As you can see, a pin “absolute” if it involves a piece being pinned to its own King, so that some (or all) of its otherwise potential moves are illegal, as they would expose the King to check.

Next: Relative Pins

Copyright 2002 S. Evan Kreider.  Used with permission.

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