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In chess
Chess

Chess is a recreational and competitive game played between two Player . Sometimes called Western chess or international chess to distinguish it from History of chess and other chess variants, the current form of the game emerged in Southern Europe during the second half of the 15th century after evolving from similar, much older...
, a double check is a check delivered by two pieces at the same time.

The most common form of one check involves one piece moving to deliver check, at the same time revealing a discovered check from a piece behind (such a check is an inherent part of the type of smothered mate
Smothered mate

In chess, a smothered mate is a checkmate delivered by a knight in which the mated king is unable to move because he is surrounded by his own pieces....
 known as Philidor's legacy). The only replies to a double check are king moves, as capturing the checking piece (except by the king, which in the process moves out of check by the other piece) is not an option since there are two of them, and interposition is likewise impossible as there would be two lines of attack to block.

Exceptionally, the piece moved does not have to give check.






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In chess
Chess

Chess is a recreational and competitive game played between two Player . Sometimes called Western chess or international chess to distinguish it from History of chess and other chess variants, the current form of the game emerged in Southern Europe during the second half of the 15th century after evolving from similar, much older...
, a double check is a check delivered by two pieces at the same time.

The most common form of one check involves one piece moving to deliver check, at the same time revealing a discovered check from a piece behind (such a check is an inherent part of the type of smothered mate
Smothered mate

In chess, a smothered mate is a checkmate delivered by a knight in which the mated king is unable to move because he is surrounded by his own pieces....
 known as Philidor's legacy). The only replies to a double check are king moves, as capturing the checking piece (except by the king, which in the process moves out of check by the other piece) is not an option since there are two of them, and interposition is likewise impossible as there would be two lines of attack to block.

Exceptionally, the piece moved does not have to give check. The only way for this to happen in orthodox chess is by way of an en passant
En passant

'En passant' is a move in the board game of chess. En passant is a special capture made immediately after a player moves a pawn two squares forward from its starting position, and an opposing pawn could have captured it as if it had only moved one square forward....
 pawn
Pawn (chess)

The pawn is the weakest and most numerous chess piece in the game of chess, representing infantry, or more particularly armed peasants or pikemen....
 capture. In the position shown to the right, Black has just played 1...g5 (from g7). White replies 2.hxg6 e.p.+. This is a double check even though the pawn that White just moved is not giving check. Rather, one check is given by the rook, the other by the bishop; the former is discovered by the movement of the capturing pawn, the latter by that of the captured pawn. Such a double check is extremely rare in practical play, but is sometimes found in problems
Chess problem

A chess problem, also called a chess composition, is a Chess puzzle set by somebody using chess pieces on a chess board, that presents the solver with a particular task to be achieved....
.

Variants and triple check


In chess with variant rules
Chess variant

A chess variant is a game derived from, related to or similar to chess in at least one respect. The difference from chess can include one or more of the following:...
 or fairy pieces
Fairy chess piece

A fairy chess piece or unorthodox chess piece is a chess piece not used in conventional chess, but used in certain chess variants and some fairy chess....
, other ways of delivering a double check may be possible. Triple checks may also be possible, for example in the position shown, White plays 1.Ba8 triple check (the moa is a non-leaping knight which first takes a diagonal step, then an orthogonal one). After the bishop moves, both moas and the queen check the black king.