Chess Puzzle #64747

CHESS PUZZLE, FEN 5n1k/7p/5p1P/4q3/p1b5/P7/1Q6/KR5r b - -

Added by:	blitzkov
Added on:	05-Jun-12
Description:
Difficulty:	chess puzzle 5n1k/7p/5p1P/4q3/p1b5/P7/1Q6/KR5r b - -
Attempts:	40
Solved:	21 (52%)


Black to move, mate in 2

Comments: (1) » Last

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capafan 13-Mar-26, 05:42 » Report abuse	Zugswang in 1 move... Black puts White into zugswang with 1...Rh2, by way of a double threat. White loses because he has to move, but every move he can make is a losing move. Black threatens 2...Q×Q#, since White's Rook is the only piece that can move, and by moving, it abandons its guard on b2, the Queen. The key point is the x-ray attack of the Rook on a2. It's a quasi-pin, since the target is not a piece, but an empty square, a2, but it's a mating square. White's Q cannot leave the second rank (e.g., 2. Q×e5), lest Black plays 2...Ra2#.

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capafan
13-Mar-26, 05:42

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Zugswang in 1 move...

Black puts White into zugswang with 1...Rh2, by way of a double threat.

White loses because he has to move, but every move he can make is a losing move.

Black threatens 2...Q×Q#, since White's Rook is the only piece that can move, and by moving, it abandons its guard on b2, the Queen.

The key point is the x-ray attack of the Rook on a2. It's a quasi-pin, since the target is not a piece, but an empty square, a2, but it's a mating square. White's Q cannot leave the second rank (e.g., 2. Q×e5), lest Black plays 2...Ra2#.

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