Definitions:
Functionary Chess : A piece can move only if it is threatened.
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.
No.1418 Udo Degener Germany original – 07.07.2019
Solutions: (click to show/hide)
white Kg1 Sg4
black Kg3 Gb3h2
h#13.5 b) Gb3→h6 (4+6)
a)
1...Sg4-f2 2.Gh2-e2 Sf2-e4 3.Kg3-f3 Se4-d2 4.Kf3-e3 Sd2-c4 5.Ke3-d3 Sc4-e5 {
} 6.Kd3-d4 Se5-f3 7.Kd4-e3 Sf3-d2 8.Gb3-f3 Sd2-c4 9.Ke3-d3 Sc4-b2 10.Kd3-c3 Sb2-d1 + {
} 11.Kc3-c2 Sd1-e3 12.Kc2-d2 Se3-f1 13.Kd2-e1 Sf1-d2 14.Gf3-d1 Sd2-f3 #
b) bGb3-->h6
1...Sg4-e3 2.Gh2-f4 Se3-f5 3.Kg3-g4 Sf5-e3 + 4.Kg4-h3 Se3-g4 5.Gh6-e3 Sg4-f2 {
} 6.Kh3-g4 Kg1-h1 7.Kg4-f3 Sf2-g4 8.Ge3-g3 Sg4-e5 + 9.Kf3-e2 Se5-d3 10.Gf4-h2 Sd3-e1 {
} 11.Gh2-d2 Se1-f3 12.Gd2-f2 Sf3-g1 13.Ke2-f1 Sg1-e2 14.Gg3-e1 Se2-g3 # {
(C+ by Popeye 4.79) }
Piece count should be 2+3
2+3 per each twin makes total 4+6 🙂
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