No.1742
Torsten Linß
(Germany)
Original Fairy problems
JF-2023:
01.01.2023 - 31.12.2023
☝ Definitions
No. 1742 Torsten Linß
Germany
original - 31.03.2023
Dedicated to Shankar Ram
white Ke3 Qa2 Bc6
black Kc1 Qb1
reci-hs(=)#5.5 3+2
4.5h(bw) --> =1 & s#1
4.5h(bw) --> =1 & s#1
Solution: (click to show/hide)
Thank you, Torsten! Two matching Q/K Indians, and 4x+1 “Love Chase” tries and key! I’ll slip in the haiku made by ChatGPT!
Julia, The solution should read: 1…Qb8 2.Qh2 Kb1 3.Kd2 Ka2 4.Kc1+ Kb3 5.Kb1 Ka3+ 6.Qxb8= & 6.Qb2+ Qxb2#
And the definition should be:
Reciprocal HelpSelf(stalemate/mate) (Reci-HS=/#n): White and Black play in cooperation to reach a position where W can both =1 and S#1.
As more types of such double-goals are added, the “Reciprocal” prefix is confusing and has to be dropped in favour of the notation: m.nd|h(b|w w|b) –> A & B
where:
m.n: move length of the initial sequence leading to the multi-goal position
d or h: defensive or cooperative play
(b|w w|b): who moves first and who is to move when the multi-goal position is reached
A, B…: multiple goals which have to be executed in the position resulting from the common preliminary sequence
For what it’s worth: a “clone of Popeye” is not necessary to test this problem. Regular Popeye can deal with this if the stipulation is indicated as
sstip Black 9h[2ad[#]&1h[=]h]h
i.e.:
Finding the optimal “wording” of the sstip is a bit tricky:
sstip Black 9h[1h[=]h&2ad[#]]h works as well, but takes more time.
sstip Black 9h[1h[=]h&2ad[#]]h even allows Intelligent Mode to be used (for the h=5 part), but this doesn’t save time for this problem, probably because there are many stalemate positions to be tried.