No.932 (VC&KW)

 No.932 Vlaicu Crișan (Romania) &Klaus Wenda (Austria) Original ProblemsJF Retro and PG problems 2015-2016    →Previous ; →Next ; →List 2015(II) Please send your original fairy problems to: julia@juliasfairies.com

No.932 by Vlaicu Crișan & Klaus Wenda – King’s march in Anti-Circe Proca Retractor. (JV)

Definitions:

The -16 & #1 stipulation means: retract 16 moves and then the White (forward) mating move.

Defensive Retractor: In Defensive 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. 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.
• In Hoeg Retractors the opposite side decides, if and what man was uncaptured.
• In Klan Retractors always White decides, if and what man was uncaptured.
• In Pacific Retractors there are no uncaptures at all.

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.

 No.932 Vlaicu Crișan &Klaus WendaRomania / Austriaoriginal – 15.10.2015 Solution: (click to show/hide) white Kf4 Bc4 Sg8 Pa2b3c6e3g2g3g6h2 black Kb8 Rg1 Be1 -16 & #1    Proca Retractor      (11+3)Anti-Circe {no animation for Proca Retractors (JV)} Mainplan: 1.b5xa5 ep. (>pa2) a7-a5 2.Sf6-g8 & 1.c7+ Ka8/Kb7/Kc8! If White could shift Bc4 to b7 with tempo (selfchecks) the 3 flights are guarded and the main plan would work. To reach this goal a long foreplan with King-march, interrupted by 2 surprising B-moves is necessary: 1.f3xRg4(>pg2)! Rg5-g4+ 2.Ke5-f4 Rg4-g5+ 3.Kd4-e5 Rg5-g4+ 4.Kc5-d4 Rg4-g5+ 5.Kb4-c5 Bf2-e1+ (blocking f2) 6.Bf1-c4! Rg5-g4+ 7.Ka5-b4 Rg4-g5+ 8.Bb7xQa8(>Bf1)! Ka7-b8+ 9.Kb4-a5 Rg5-g4+ 10.Kc5-b4 Rg4-g5+ 11.Kd4-c5 Rg5-g4+ 12.Ke5-d4 Rg4-g5+ 13.Kf4-e5 (return of white King) Rg5-g4+ 14.g2xSh3(>ph2) Kb8-a7+ (return of black King) 15.b5xa5 ep.(>pa2) a7-a5 16.Sf6-g8 & 1.c7# Please note that both 8.Bb7xRa6(>Bf1)? Rb6-a6+ 9.Kb4-a5?? and 8.b7xQa8=B (>Bf1)?? are illegal. (Authors)

One Response to No.932 (VC&KW)

1. Günther Weeth says:

One of the best trips of the wK I`ve ever seen in a defensive retractor. The goal of the arrival on a5 and the return to f4 is far from obvious (uncapture of bQa8/bSh3 with tempo). This is an excellent example to present clear New German logic in a retro-problem. This moremover might – despite its length – be apppreciated even by retro-friends who usually are not too familiar with Anticirce.