Julia's Fairies

No.728 (CP)

Cornel Pacurar


Original Problems, Julia’s Fairies – 2015 (I): January – June

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No.728 Cornel Pacurar – Series Retractor showing the BB/SS/RR/QQ uncapture pairs. (JV)


Series Retractor: In the retro phase, White or Black retracts a series of legal moves.
-n [w|b] & forward stipulation: White and/or Black retracts (takes back) a given number of moves (-n moves), in order to reach a position in which a forward stipulation is met.

No.728 Cornel Pacurar

original – 18.02.2015
Dedicated to Kjell Widlert

Solutions: (click to show/hide)

white   kc6 black kf3 pf7h4

-2b & h=1                                   (1+3)
b) Ph4→f5 ; c) Ph4→e6 ; d) Pf7→d3

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Kjell Widlert
Kjell Widlert
February 19, 2015 17:49

The perfect complement to 716.1 with all possible pairs of different uncaptured pieces (disregarding pawns):
here we have all possible pairs of two equal uncaptured pieces!

It took some ingenuity to arrange for the QQ solution, I assume, as the bK cannot make the first uncapture and the order of the moves still has to be unique.

Kjell Widlert
Kjell Widlert
February 19, 2015 17:50
Reply to  Kjell Widlert

Oh, and I forgot: many thanks for the dedication!

Mike Neumeier
Mike Neumeier
March 14, 2015 20:25

Even with a definite key in the QQ line (assuming it had to be this yet unused pair) it took me a surprisingly long time to see the second uncapture. At first, if it was going to be a second uncapture by the same pawn, my brain was fixed only on uncapturing along the same diagonal! Only after exploring ALL other second move uncaptures by king and other pawn did I find the well hidden answer. Good show!

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