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Chess Problem 1990b7b501

BDS

feenschach, 1990

8/1K1p4/2*3rP4/1k1p1S2/1PSP4/P1*3b5/8/8

H#2
2 solutions
PAO c6
VAO c3 

1.VAa1 Sb2 2.VAxd4 Sxd4#
1.PAa6 Sb6 2.PAxd6 Sxd6#

If a4 were guarded and the wPs d4 and d6 were missing, White could mate on those latter squares with the wSf5. In each solution, a black Chinese Piece retreats over a critical square, which the wSc4 then moves to. From here it guards a4 and provides a hurdle over which the Chinese Piece can capture the wP, allowing the wS to mate.

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