Editing Check (chess) (section)

==Overview==
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{{Chess diagram small
| tright
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|  |  |  |  |rd|  |  |  
|  |  |  |  |  |  |  |  
|  |  |kd|  |  |  |  |  
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|  |  |  |  |bl|  |  |  
|  |  |  |  |kl|  |  |  
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| Black must address the check from the bishop despite the pin against the white king.
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{{Chess diagram small
| tright
|
|  |kd|  |  |  |  |  | 
|  |  |  |  |  |  |  | 
|  |  |  |  |  |  |rd| 
|  |  |  |  |  |  |  | 
|  |  |  |  |bd|  |  | 
|  |  |  |  |  |  |  | 
|  |  |  |  |  |  |  |pl
|  |  |  |  |  |  |  |kl
| White has been checkmated. The king cannot escape check and White has lost the game.
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A check is the result of a move that places the opposing king under an immediate threat of capture by one (or, in rare cases, [[Double check|two]]) of the player's pieces. Making a move that checks is sometimes called "giving check". Even if a piece is [[pin (chess)|pinned]] against the player's own king, it may still give check. For example, in the diagrammed position, White has just played Be4+, simultaneously giving check and blocking the check from Black's rook. Black must now address the check; the fact that the bishop cannot legally move is irrelevant. If the king is in check and the checked player has no legal move to get out of check, the king is [[checkmate]]d and the player loses.

Under the [[rules of chess|standard rules of chess]], a player may not make any move that places or leaves their king in check. A player may move the king, capture the threatening piece, or [[Block (chess)|block]] the check with another piece.<ref>{{harvcol|Just|Burg|2003|p=27}}, {{harvcol|Polgar|Truong|2005|pp=32,103}}, {{harvcol|Burgess|2009|p=550}}</ref> A king cannot itself directly check the opposing king, since this would place the first king in check as well. A move of the king could expose the opposing king to a [[discovered check]] (and, rarely, checkmate) by another piece, however.

In [[fast chess]], depending on the rules in effect, placing or leaving one's king in check may result in immediate loss of the game. If it does not, then the move is simply undone, and the other player usually receives extra time as a penalty to the player who failed to notice the check.
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