Peter Harris (South Africa)
Original Problems, Julia’s Fairies – 2013 (III): September- December
Please send your original fairy problems to: firstname.lastname@example.org
No.452 by Peter Harris – A paradoxical white Rex-solus problem without any white pieces on the board in the twin! (JV)
Same as in Peter’s problems No.420 and No.449 there’s Chameleon Chess condition which is implemented differently in Popeye and in WinChloe, so please take into consideration that here is Popeye‘s (and also the inventor’s) version. (JV)
Maximummer: Black must play the geometrically longest move or may choose from among longest moves of equal length, distances being measured from the center of each square. Diagonal and oblique distances are measured from the orthogonal coordinates by using Pythagora’s theorem (take the square root of the sum of the squares of the orthogonal distances). All other orthodox chess rules apply. (=Black Maximummer)
Minimummer: Black must play his geometrically shortest move or may choose from among shortest moves of equal length, distances being measured from the center of each square. Diagonal and oblique distances are measured from the orthogonal coordinates by using Pythagoras’s s theorem (take the square root of the sum of the squares of the orthogonal distances). All other orthodox chess rules apply. White Minimummer: White must make moves with minimal possible length.
Chameleon Chess: All pieces on the board which are displayed as orthodox Q, R, B, S, are Chameleons. A Pawn can promote only in Chameleon-pieces.
Here I’d like to mention that this interpretation works in Popeye‘s versions till 4.61, and doesn’t work in the last version, 4.63 because of the bug which is going to be corrected in the next version.
Also, WinChloe has a different interpretation of Chameleon Chess, where orthodox pieces on the board don’t turn into Chameleons, but a pawn promotes into Chameleon piece. I’d like to offer you a little explanation with examples about WinChloe’s interpretation of Chameleon Chess and Promotion into Chameleon Allowed kindly provided by Christian Poisson.
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 if any Chameleon piece is presented on the board.
Anti-Andernach: A piece (excluding King) changes its color after any non-capturing move. After capture, the piece retains its color. Rooks on a1, h1, a8 and h8 can be used for castling, provided the usual other rules for that move are satisfied. After castling, Rooks do not change color, If White makes a non-capturing move with neutral or halfneutral piece, that piece becomes black and vice versa.
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.452 Peter Harris
original – 08.12.2013
h#4 b) – wKa6 (1+6)
Solutions: (click to show/hide)
a) 1.b2-b1=wB Ka6-a5 2.a2xb1=B [+wBf1] Ka5-a4 3.e2xf1=B Ka4-a3 4.Bf1-a6=wR Ka3-b3 #
b) 1.e2-e1=wS Se1-d3=bB 2.Bd3-h7=wR Rh7-h8=bQ 3.Qh8-c3=wS Sc3-b1=bB 4.d2-d1=wS Sd1xb2=B [+bPb7] #
(С+ by Popeye 4.61; in Py4.63 Chameleon Chess works incorrectly!)
With -wKa6, (b) would give a [different] solution without ChameleonChess. (Author)