Original Problems, Julia’s Fairies – 2013 (I): January – April
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No.220 – h#3 by Francesco Simoni – An interesting and difficult problem with rich strategy! (JV)
Grasshopper(G): Moves along Q-lines over another unit of either color to the square immediately beyond that unit. A capture may be made on arrival, but the hurdle is not affected.
Rookhopper: As Grasshopper, but moves on Rook lines only.
Bishophopper: As Grasshopper, but moves on Bishop lines only.
No.220 Francesco Simoni
h#3 2 solutions (6+5)
Bishophopper a7, g8
Rookhopper c8, d8
Solution: (click to show/hide)
I. 1.Qe4 (Qc6 ?) Gd3 (Gf5 ?) 2.Qc6 (Qe6 ?) Sc5 (Sc1 ?) 3.BHd4 (RHd4 ?) Sd5‡
II. 1.Qg6 (Qe6 ?) Gf5 (Gd3 ?) 2.Qe6 (Qc6 ?) Sd5 (Sa2 ?) 3.RHd4 (BHd4 ?) Sc5‡
The bQ would already be able to occupy its final square c6 (or e6) on B1. However, to make W1 possible, the bQ moves first to another square, where it continues to guard both squares c6 and e6, to play in one of them in B2, and the bQ B2 move is specified by the move W1 by the grasshopper, which will guard the flight d5 (or c5) in the mate position. In B2 the bQ move allows the white guard on the other flight c5 (or d5) by the hopper c8 (or g8) with anticipatory selfpin of the bQ itself. In W2 the wS move pins the bQ and takes two flights. Finally, in B3, the hopper which jump became possible, blocks the square d4. Anti-battery pin model mates in reciprocal form. (Author)