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Chess Problem 1994h6c401

BDS

Problem Observer, 1994

8/*3Q1Sb4/7K/pppS4/2k*3rp3/1*3s1*3sp3/p1Pp4/8

#2
LEO a7
PAO d4
MAOs b3, d3 

1.LEa8! (2.LExe4#)

1...MAb4 2.LEa6#
1...MAb2 2.LExa2#
1...Bc6  2.LEg8#
1...Bf5  2.LEc6#

White threatens an anti-battery mate over the bPAd4, a currently immovable hurdle. In the first two thematic variations Black moves the MAd3 to give the hurdle an escape square. In each case this move immobilises another potential black hurdle, which White then mates over.

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