No.728 (CP)

 No.728 Cornel Pacurar(Canada) Original Problems, Julia’s Fairies – 2015 (I): January – June    →Previous ; →Next ; →List 2015(I) Please send your original fairy problems to: julia@juliasfairies.com

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

Definition:

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 PacurarCanadaoriginal – 18.02.2015Dedicated 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 {(no animation for retractors for now (JV)) } a) -1.Kg3×Bf3 -2.Kh3×Bg3 & 1.f7-f5 Bg3-f4= (BB) b) -1.Kg2×Sf3 -2.Kh1×Sg2 & 1.f7-f6 Sg2-f4= (SS) c) -1.Kg4×Rf3 -2.Kf5×Rg4 & 1.Kf5-e5 Rf3×f7= (RR) d) -1.g5×Qh4 -2.h6×Qg5 & 1.h6-h5 Qg5-d2= (QQ)

3 Responses to No.728 (CP)

1. Kjell Widlert says:

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 says:

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

2. Mike Neumeier says:

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!