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Tactics Motifs

X-ray Attack

An X-ray attack occurs when a piece of yours attacks an enemy piece or an important square (the target of the attack) through an enemy piece that is placed in the middle of your attacking piece's line of action. Your attacker and the enemy piece at the middle must have the same line of action in a stretch of diagonal, file or rank, meaning the enemy piece must be able to attack your attacker and defend the target. So, a bishop can not X-ray attack through a rook, or a rook through a bishop or any piece through a knight, but it is possible to X-ray attack through a pawn, when the target of the X-ray is defended by the pawn, despite the pawn being unable to attack your attacker. If this is not the case, then other motifs like skewer, pin, discover or clearance may be more appropriate.

Unlike in a skewer or a pin, the relative value of your attacker and the piece being attacked through is irrelevant. If there is not an attack or defense through an enemy piece or the enemy piece moves out of the line of action of your piece, allowing the attack or defense of the target, then this is not an X-ray and other motifs like skewer, pin, discovery or clearance may be more appropriate. The X-ray should not be confused with a Battery, which represents an attack or defense though a friendly piece, not an enemy piece. (Source:- Chess Tactics CT)...

For more further information about the x-rays attack please check the next link:-

https://www.chess.com/article/view/the-most-important-tactical-pattern?alert=content

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