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Chess Problem 2000c2e201

BDS

The Problemist Supplement, 2000

8/4pQ2/4p2p/5p2/3B1*3R2/5*3B2/2K1k2S/4*3r2*3r

#2
PAOs f4; e1,h1:
VAO f3 

1.VAh5!    ()

1...PAhf1   2.PAf3#
1...PAhg1   2.PAg4#
1...PAxh5   2.Qxh5#
1...PAe any 2.Qxe6#
1...e5      2.Qc4#

The withdrawal key looks good, but it is very strong, setting up the rear piece for anti-battery mates that are delivered after both moves along the bottom rank by the PAh1. In each case the wPAO has to occupy the square the bPAO would othersise interpose on. The by-play exercises the white queen.

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