Original Problems, Julia’s Fairies – 2014 (II): May – August
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No.542 by Chris Feather – Nice thematic S-mates, surprising B-promotion! (JV)
Definitions (from Fairings No.32):
Symmetry Anti-Circe: As Anti-Circe except that the rebirth square for the capturing unit is that which is symmetrical in Symmetry Circe.
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, the rarer Cheylan variant (always to be specified) excludes them. In practice many problems can be of either type.]
Symmetry Circe: As Circe except that the rebirth square for the captured unit is that which lies at an equal distance (in a straight line) beyond the midpoint of the board. Thus a capture on c4 produces a rebirth on f5, a capture on g1 produces a rebirth on b8, and so on. Strictly speaking there are of course other types of symmetry: this one is rotational.
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.542 Chris Feather
original – 07.05.2014
Solution: (click to show/hide)
Set: 1…Se5xf7[wSf7->c2] #
Solution: 1.f7-f6 2.f6xg5[bPg5->b4] 3.b4xa3[bPa3->h6] 4.h6-h5 5.h5-h4 6.h4-h3 7.h3-h2 8.h2-h1=B 9.Bh1-d5 10.Bd5xb3[bBb3->g6] Se5xg6[wSg6->b3] #
(C+ by Popeye 4.65)
Changed genre-specific mates. (Author)