+/- Russian translation
|Anti-Circe:||After a capture the capturing piece (Ks included) must immediately be removed to its game array square (necessarily vacant, else the capture is illegal). Captures on the rebirth square are allowed in Anti-Circe Calvet and not allowed in Anti-Circe Cheylan. Game array squares are determined as in Circe: R, B & S go to the square of the same colour as the capture; Ps stay on the file of capture; fairy pieces go to the promotion square of the file of capture.|
|stipulations||'Proca Retractor', '-N & s#1'|
|-N & s#1:||The stipulation means: retract N moves and than selfmate in 1.|
|Proca Retractor:||The one of the Defensive Retractors, where White and Black retract (take back) a given number of moves (-n moves), in order to reach a position in which a forward stipulation (e.g. #1, s#1) is met. Given a choice, Black will retract those moves that avoid or delay White’s goal. Unless otherwise stated, Black may defend by mating White through a forward move, if such an opportunity exists after one of Black’s retractions.|
The different kinds of Defensive Retractors only differ in the way uncaptures are handled, of course only legal uncaptures are allowed. In Proca Retractors the retracting side decides, if and what man was uncaptured.
No. 1649 Andreas Thoma
original - 13.09.2021
Klaus Wenda zum 80 Geburtstag
White Kf2 Rh1 Black Kf7 Ra7 Pa3b3c3d3e3f3g3h3
-8 & s#1 Proca 2+10
Solution: (click to show/hide)
--Sorry, no animation for this kind of problems (JV)
1.Kg2-f2 Kg7-f7 2.Ta1×Lf1→h1 Le2-f1 3.Ta1×Se1→a1 Sc2-e1 4.Kf1-g2 Ld1-e2 5.Ke1-f1 Sb4/d4-c2 6.Ke1×Df1→e1 Dg2-f1 7.Th1×Tg1→a1 Kh8-g7 8.Tg7×Sh7→h1 & vor: Tg7-g8+ K×g8→e8#
(C? - Tested by Pacemaker)
8 b pawns in a row are an optically appealing setting that makes eager to solve the problem. Clever managed uncaptures by wK/wR and an attractive forward play meet the expectations. Thank you Andreas for the nice dedication.