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Chess Problem 2014e4h101

BDS

The Problemist Supplement, 2014

8/4p2*3R/2*3s5/5B*3R1/4KP2/7b/*3b3P2q/6bk

R#2
PAOs g5, h7:
VAO a2:
MAO c6 

1.Kf3!   (2.PAf7   Qg2#)

1...MAd4+ 2.Be4    VAd5#
1...MAe5+ 2.e4     VAd5#
1...VAf7  2.PAxe7  Qg2#
1...Be3   2.PAhg7  Qxf4#

The wK walks into danger, including two checks. White answers the checks by self-pinning on e4, after which Black has to mate over the pinned piece.

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