Original Problems, Julia’s Fairies – 2014 (II): May – August
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No.556 by Julia Vysotska – My lovely Chameleons again, but this time in Anti-Circe problem! The main thing is thematic mating finals created with a pairs of neutral Chameleons.
Attention: this problem is C+ by Popeye only as Anti-Circe for Chameleons works differently in WinChloe. Popeye for game-array square of Chameleon piece uses Chameleon‘s current phase; while WinChloe considers Chameleon as any other fairy piece with a promotion square of the file of capture. (JV)
Chameleon: On completing a move, a Chameleon (from classical standard type) changes into another piece, in the sequence Q-S-B-R-Q… Promotion may be to a chameleon at any stage in the cycle.
Anti-Circe: Anti-Circe Calvet (the default type): 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. Game array squares are determined as in Circe.
Circe: Captured units (not Ks) reappear on their game-array squares, of the same colour in the case of pieces, on the file of capture in the case of pawns, and on the promotion square of the file of capture in the case of fairy pieces. If the rebirth square is occupied the capture is normal.
No.556 Julia Vysotska
original – 15.06.2014
h#2 b) Be8→f6 (3+5+2)
Neutral Chameleons: Qb6, Qc3
Solutions: (click to show/hide)
a) 1.ncQb6xe3=ncS[ncSe3->b8] ncQc3-g3=ncS 2.ncSb8-d7=ncB + ncBd7-g4=ncR #
b) 1.ncQb6-e6=ncS e5xf6[wPf6->f2] 2.ncQc3-f6=ncS ncSe6-g5=ncB #
(C+ by Popeye 4.67)
Neutral Chameleons’ play in Anti-Circe. The main idea was to show two different mates with a pair of neutral Chameleons. In the both phases neutral Chameleon in S phase blocks mating neutral Chameleon in R/B phase. These blocks use the both – Chameleon and Anti-Circe features: in a): mating piece ncRg4 can’t capture ncSg3 as it would transform into Q phase and reappear on d8 square with an illegal selfcheck; additionally ncRg4 can’t be moved away to g5 or along 4th file as it would transform into Q phase as well; in b) mating piece ncBg5 can’t capture ncSf6 as it would transform into R phase and reappear on h8 square with an illegal selfcheck; additionally ncBg5 can’t be moved away to h6 or f4 as it would transform into R phase as well.