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Rules

Checkmate

The object of the game of chess is to place your opponent’s king in “checkmate.”  Doing so wins the game.  Checkmate is a situation which occurs when a king is currently in check and does not have a legal move which will get him out of check.  Observe the following diagrams, each with a caption indicating whether or not the current position is checkmate, and why or why not:








Black is checkmated.
(The black king cannot move out of check, there is no way to interpose a piece between the black king and the white queen, and the black king cannot capture the white queen because she is protected by the white rook.)









Black is not checkmated.
(The black king can simply capture the white queen.)









Black is not checkmated.
(The black king can simply move one square to the right.)









Black is not checkmated.
(The black knight can capture the white queen.)









Black is checkmated.
(The black knight cannot capture the white queen because it is pinned by the white rook (i.e., moving the black knight is not legal in this position because it would expose the black king to check by the white rook).)









Black is not checkmated.
(The black queen can break check by placing herself in front of the black king.)









Black is checkmated.
(There is no black piece which can interpose itself between the black king and the white rook.)

Next: Stalemate

Copyright 2002 S. Evan Kreider.  Used with permission.

 

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