X-ray (chess)
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In chess, an x-ray is an attack that involves the action of a piece being felt "through" a piece of the opposite color.
The illustrated example is from Alekhine-Nestor, Trinidad 1939, with White to move:
- 1.Rc8 Qxd7
- (1...Rxc8 2.Qe7 Qxe7 3.dxc8/Q+ Qe8 4.Qxe8#)
- 2.Qf8+! 0-1
- Black resigned in view of 2...Rxf8 3.Rxf8#.
The moves are given in algebraic chess notation.