X-ray

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Commonly, X-ray in Chess refers to a family of several tactical motives, where a sliding piece attacks through any other piece in a ray-direction. In particular, a X-ray refers to an indirect defense, where a sliding piece conditionally defends an own piece, which is attacked by an x-rayed opponent sliding piece from the same direction. X-ray and batteries may be subject of static exchange evaluation.

=X-ray Motives=
 * Battery
 * Discovered Attack
 * Discovered Check
 * Pin
 * Skewer

=See also=
 * Sliding Pieces
 * Sliding Piece Attacks
 * Static Exchange Evaluation
 * SEE - The Swap Algorithm
 * X-ray Attacks (Bitboards)

=External Links=
 * X-ray (chess) from Wikipedia
 * Chess Note 4245. X-ray attack by Edward Winter
 * X-ray Attack - Chess.com
 * Chess Tactics Index - 15 Tactics, From Battery Attacks, to X-Ray Attacks
 * X-ray from Wikipedia
 * Christian Bakanic’s Trio Infernal - X-Ray, Vienna Jazz Festival, 2015, YouTube Video

=References= Up one Level