Editing Discovered attack (section)

==Types==
{{Chess diagram
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|rd|  |qd|  |rd|  |kd|  
|  |bd|  |  |  |  |bd|pd
|  |  |  |  |nl|  |pd|nd
|pd|  |pd|  |  |  |  |  
|  |pd|  |  |pd|pl|  |  
|  |ql|  |  |pl|  |pl|bl
|pl|pl|  |  |  |  |  |  
|  |kl|rl|  |  |  |  |  
| The move 1.Nc7+, besides forking both rooks with the knight, also reveals an attack on Black's queen and a check.
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{{Chess diagram
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|  |  |  |  |  |  |  |kd
|  |  |  |  |  |  |pd|pl
|  |  |  |  |  |bl|  |rl
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| Position after 1...g7–g5. An ''[[en passant]]'' capture can reveal two checks at once.
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When the moving piece gives [[check (chess)|check]] to the opponent's king, the maneuver is often described as a ''discovered attack with check''.  When the discovered attack is itself a check, it is called a ''discovered check''.  If both pieces give check, a [[double check]] results.

Discovered attacks—especially checks—can win material when the moving piece captures an opposing piece nominally protected by another opposing piece. If the opponent deals with the discovered attack (obligatory if it is a check), the attacking player will have time to return the moving piece out of harm's way.  This scenario is often referred to as a ''discovered attack'' (or ''check'') ''with capture''.  A discovered check can also win material if the moving piece ends up attacking another undefended piece.  In this case, it would be impossible for the opponent first to capture the moving piece unless the king can capture. 

When the moving piece moves to a square from which it threatens to inflict [[checkmate]] on the next move, the tactic is called a ''discovered attack with mate threat''.  A ''discovered checkmate'' itself is also possible.

Less often, a move may discover multiple attacks, as in the first diagram where the knight's departure opens two crisscrossing diagonals. And in exceptional circumstances, it is even possible for two checks to be revealed simultaneously. The only way for this to happen in orthodox chess is by way of an ''[[en passant]]'' capture. In the position shown in the second diagram, Black has just played 1...g7–g5. White replies 2.hxg6{{chessAN|e.p.}}++. The result is a double check: One check is given by the rook, discovered by the capturing pawn's move; the other by the bishop, created by the captured pawn's removal. (The bishop’s check is not a discovered check, as the black pawn is captured and not moved.) Such a check is extremely rare in practical play, but it is sometimes found in problems.