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white gives mate in 2

white gives mate in 2

Posers and Puzzles

M
Standard memberMephisto2

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white to play. Checkmate in 2.

author: K. Junker

BigDogg
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Originally posted by Mephisto2
[fen]8/8/1p6/1P5p/P3R2P/8/1pQN1kB1/bK4R1 w[/fen]

white to play. Checkmate in 2.

author: K. Junker
1.Rb4! (zz)

1...Kxg1 2.Nf3#
1...Kg3 2.Nf1#
1...Ke2 2.Nc4#
1...Ke3 2.Nf1#

M
Standard memberMephisto2

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yep.

ps. what does (zz) mean?

BigDogg
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Originally posted by Mephisto2
yep.

ps. what does (zz) mean?
zz = zugzwang. In problemist terms, it means that white's key move is not making a threat.

M
Standard memberMephisto2

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Thanks. It is a zugzwang issue indeed. If black were to move first, it would have been a mate in 1.

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