Fairy helpmates with echo diagonal-orthogonal 5

This is the 5th special example file for 14th TT CCM. All problems in this set have exactly 2 black units in the diagram. Generally they make the proof that you don't need a lot of pieces to express an echo diagonal-orthogonal. The question is, whether it is possible to get "really good echo diagonal-orthogonal" with only a few units... and yes, it is, remember h# by Didier Innocenti...
Bernhard Rehm
Feenschach 1956

1...Gh7 2.Qg6 Qf5#

1.Qh5 Sb4 2.Qg4 Qf4#

Precise echo diagonal-orthogonal of the model mate - on the line we have wS-x-bK-wQ-bQ-wG. Again the form the set play and solution as in the last time.

h#2* (5+2)
1+0 grasshopper

Karl-Ernst Kiel
3rd Prize Schach-Echo 1973

1...Gf2 2.Qg4 Gh3 3.Qf3 Re3#

1...Ga4 2.Qb6 Ga6 3.Qb5 Bc4#

This helpmate is indeed and excellent example of D-O echo. Almost everything is perfectly matched and some a bit less analogical points are only due to geometry of the board. Well done!

h#2,5 (6+2)
3+0 grasshopper

Cedric C. Lytton
The Problemist 1989

Subversive unit: it cannot capture, but units of the opposite side under its control don't check normally, but an won king instead.

1.Ke2 ESb3 2.Kf3 Qe3#

1.Ke4 ESb7 2.Qf3 Qd5#

Echo diagonal-orthogonal of the mate. At the first sight subversive pieces seem to be quite flexible and I wonder what is possible to do with them not only in the D-O context...

h#2 (3+2)
1+0 subversive equihopper

Manfred Rittirsch
Problemkiste 1991

a) 1.Kb7 Rb2 2.Ka8 Ra2#

b) 1.Ka7 Bc2 2.Ka8 Be4#

Black queen guards potential mating lines, that's why White stops precisely on guard lines and thus cuts them. In the meantime bK enters corner, diggine holes on potential flights.

h#2 (2+2)
Haaner chess
b) wBb1

Norbert Geissler
171 harmonie 42 - December 1993

a) 1...d8B+ 2.Kd2 Bg5+ 3.Ke1 Bd2#

b) 1...d8R+ 2.Kb1 Rb8+ 3.Kf1 Rb1#

And here, with only 3 pieces in the diagram position we see good analogy too. White checking promotion, follow-my-leader repeated twice and a mate using Circe selfguarding and bpg2 as block and cut of line. It is made possible by bK moving twin.

h#2,5 (1+2)
0+1 transmuting king
b) g5 -» b8

Torsten Linß
3rd-4th Prize Andernach 1996

a) 1.Gd8(w) Gd3(b) 2.Gd1(w) Gd7(b)#

b) 1.Gb8(w) Gf4(b) 2.Gh2(w) Gc7(b)#

Whole mating net is constructed, it suffices to check bK. Unusually for Antiandernach chess, the mating move isn't a capturing one. Rather the mate is given over well immobilized black grasshopper making the mating move in a white coat.

h#2 (5+2)
Antinandernach chess
2+1 grasshopper
b) b8 -» d8

Achim Schöneberg
469, harmonie 56 - December 1998

1.Gc3 Gd4 2.Ge5 Gf6 3.Gg7 Gh8#

1.Ga3 Ga4 2.Ga5 Ga6 3.Ga7 Ga8#

Hop-hop-hop... reciprocal change of Ga2-Gb2 functions, all 4 corners play some role.

It was suprising to find that this problem reappeared as 8 The Problemist 2004 by Ian Shanahan. Sadly, already even in fairy chess you cannot be always sure of the originality...

h#3 (5+2)
2+1 grasshopper

Comments to Juraj Lörinc.
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