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Problem 177: Francesco Simoni - Helpmate

f simoni(27.04.2013) A complicated helpmate with Cyclic Zilahi by Francesco Simoni from Italy.

 

 

 

 

 

177

a) 1.Rxd3 (Bxc4?) Be3 2.Rd5 Bxf4#

b) 1.Bxc4 (Rxb6?) Bxb7 2.Be6 d4#

c) 1.Rxb6 (Rxd3?) Be6 2.Rd6 Re4#

Cyclical Zilahi with complete cycle of functions of three white units (capture, mate, support of the mating piece). Diagonal - orthogonal echo in black sequences of moves, with cyclical dual avoidance in B1. To self-block in B2 one of the squares d5, e6, d6, black could choice between two of three different moves in B1, but only one is successful, in cyclical form. (Author) 

 

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