Fairy chess composition

# No.738 (VC&AT)

 No.738Vlaicu Crișan (Romania) & Andreas Thoma (Germany) Original ProblemsJF Retro and PG problems 2015-2016    →Previous ; →Next ; →List 2015(I) Please send your original fairy problems to: julia@juliasfairies.com

No.738 by Vlaicu Crișan & Andreas Thoma – Unusually long and interesting Retro-play! (JV)

Definition:

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.

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/fairy_defs.html)

 No.738 Vlaicu Crișan &Andreas ThomaRomania / Germanyoriginal – 01.03.2015 Solution: (click to show/hide) white   ke1 Pb2e7 black ke5 Sh8 Pb3 -20 & #1      Proca Retractor     (3+3) Anti-Circe {(no animation for Proca retractors for now (JV)) } 1.Ke1xpf2(Ke1) f3-f2+ 2.Ke2xBd1(Ke1) Bc2-d1+ 3.e6-e7 f4-f3+ (1st repetition) 4.Kd3-e2 Bd1-c2+ 5.Ke2-d3 Bc2-d1+ (2nd repetition) 6.Kd3-e2 Bd1-c2+ 7.Ke2-d3 d2-d1=B+ (forced) 8.Ke1-e2 d3-d2+ 9.Ke3xpd2(Ke1) f5-f4+ 10.Ke2-e3 d4-d3+ 11.Ke1-e2 d3-d2+ 12.Kg6xSg7(Ke1) Sf7-h8+ 13.Kh5-g6 Se8-g7+ 14.Kg4-h5 Sg7-e8+ 15.c5xpb5 ep(pb2) b7-b5 (1st repetition) 16.Kh5-g4 Se8-g7+ 17.Kg4-h5 Sg7-e8+ (2nd repetition) 18.Kh5-g4 Se8-g7+ 19.Kg4-h5 f6-f5+ (forced) 20.Kf3-g4 & 1.Ke4#

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Kjell Widlert
March 1, 2015 17:24

Effectively doubles the content of 706.1, with only 6 pieces!

Has the draw pendulum in AntiCirce-Proca ever been doubled in miniature form before? I remember only doublings (and one 4-fold setting) with many more pieces.

seetharaman
March 1, 2015 22:01

It is funny to see the 3-move repetition rule for ‘Tournament Chess’ being applied to Anti-circe problems ! Unlike the en-passant, casling or promotions, this is not a chess rule. But more akin to 5o-move draw rule of Tournament Chess. There is no automatic draw after the third repetition. In the tournament, either player has to claim it!

Mike Neumeier
March 16, 2015 08:04

I lost it at Move 2 ( uncapturing Ke2xBd1). How could white have been standing on e2, in check (diagonally flanked) by both bBd1 and bPf3? Never saw a double check like that before. I must be blind to legal retro play.

Kostas Prentos
March 16, 2015 08:19

The bPf3 does not give check in Anti-Circe, because its rebirth square (e7) is occupied.

Mike Neumeier
March 16, 2015 08:32