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Chess Problem 2010a2d501

BDS

The Problemist, 2010

8/8/1*1Q6/1r1k4/1*1r6/8/K2P4/B*1b6

H#2
2 solutions
SIREN b6:
TRITON b4:
NEREID b1 

1.NDe4 SIe6+ 2.Kc5 d4#
1.TRe4 SId6+ 2.Kc4 d3#

In each solution, one black Marine Piece moves to e4, where it is later used as a stopper to ensure the mating pawn cannot be captured by the other black Marine Piece.

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