No.495 (KW)

No.495 
Klaus Wenda (Austria)

Warm welcome to Klaus in Original Problems section of JF !

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Original Problems, Julia’s Fairies – 2014 (I): January – April

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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)


Definitions:

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
Austria
original – 31.01.2014
 
495-6-kw-6&#1 Proca Retractor                (5+7)
Anti-Circe (type Cheylan)
 
 
Solution: (click to show/hide)

3 Responses to No.495 (KW)

  1. Vlaicu Crisan says:

    An excellent composition in the spirit of new German logical school. According to the principles adopted by this school, it is very important to respect the “purity of aim” in the foreplan. Although wPc2 is also replaced during the preparatory play, the author justly underlines the main purpose is to eliminate wPd2 from its square.
    I particularly praise the ideal placement of bQ: blocks a rebirth square, controls another rebirth square and also provides a specific double check mate thanks to an ectobattery built during the retro play.
    Masterfully done!

  2. Nicolas Dupontdupont says:

    Yes, I fully agree. And what about the solving program? Is it possible to get Pacemaker somewhere on the Internet?

  3. Günther Weeth says:

    Removal of a white obstacle by way of unblocking a strategically significant square with tempo, thus enabling the white king to enter the only square appropriate for the self-check failing in the main plan. This is a manoeuvre based on ingenious and refined planning. To the best of my knowledge, we are confronted with the first presentation of that special variant within the field of KK-contact in AntiCirce retro play. In terms of style the whole texture is polished for an elegant sample of a Meredith, – no surprise concerning the renowned author’s name!

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