Warm welcome to Klaus in Original Problems section of JF !
Original Problems, Julia’s Fairies – 2014 (I): January – April
Please send your original fairy problems to: firstname.lastname@example.org
No.495 by Klaus Wenda – A very interesting and complicated Retro-problem! Warm welcome to Klaus Wenda – world famous Austrian GM for Chess composition, former president of the WFCC! (JV)
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). 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. [The default Calvet type (not usually specified) allows captures on the rebirth square, while the rarer Cheylan variant (which, if essential for soundness, must always be specified) excludes them. Many problems can be of either type.] (def. from Fairings 34)
Proca Retractor: In Retractors, 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. Proca is a defensive retractor. Given a choice, Black will retract those moves that avoid or delay White’s goal. Black may defend by mating White through a forward move, if such an opportunity exists after one of Black’s retractions. Unless otherwise specified, forward defense is the default condition of Proca retractors. (def. from StrateGems, http://strategems.net/sections/variant-definitions.html)
No.495 Klaus Wenda
original – 31.01.2014
-6 Proca Retractor (5+7)
Anti-Circe (type Cheylan)
Solution: (click to show/hide)
Without wpd2 the mainplan would work:
The problem is Co-tested with the program Pacemaker.