No.1358
Kenneth Solja
(Finland)

Original Fairy problems
JF-2018/II:
July – December’2018


Definition: (click to show/hide)


No.1358 Kenneth Solja
Finland

original – 23.12.2018
Merry Xmas and Happy New Year 2019
to every chess composer

Solution: (click to show/hide)

white Kh1 Ph2 black Ka8b8e7f6f5g4h3 Pg5

h#7                                              (2+8)
Royal Dynasty


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François Labelle
François Labelle
December 24, 2018 02:09

Human-computer checked (HC+) with the following Jacobi input:

pieces white Kh1 Ph2 black Ka8b8e7f6f5g4h3 Pg5
stip h~3
test not dia forsyth 64 Add black K K K K K K AddPieces
stip h~2
test not dia forsyth 64 Add black K K K K AddPieces
stip h#2
cond RoyalDynasty

Explanation: After 7 moves, there must be exactly 1 black king, so after n moves there must be at most 8-n black kings. Equivalently, after n moves there must *not* be 9-n black kings or more. This is what the “test” lines are enforcing for n=3 and n=5. I could have enforced it for more values of n, but these two are sufficient for a quick (sub-1-min) verification.

Joost
Joost
December 24, 2018 12:50

First move should be Kgg3, not Kg3.