Peter Harris (South Africa)
Original Problems, Julia’s Fairies – 2013 (III): September- December
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No.453 by Peter Harris – A dance of 8 pieces around the both Kings finishes with 2 different selfmates! A problem is C+ by the old Popeye version 4.47, but have cooks in Py 4.59, 4.61 (Py 4.63 doesn’t solve Chameleon Chess, so can’t be used at all). See author’s comment about the differences in the solutions!
Same as in previous Peter’s problems 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)
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-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.
Isardam: Any move, including capture of the King, is Isardam illegal if a Madrasi-type paralysis would result from it.
Madrasi: Units, other than Kings, are paralysed when they attack each other. Paralysed units cannot move, capture or give check, their only power being that of causing paralysis.
No.453 Peter Harris
original – 09.12.2013
Dedicated to Vlaicu Crisan.
hs#3 2 solutions (5+5)
Hint / Help: (click to show/hide)
With AntiCirce + ChameleonChess, the rule that for a capture to be legal the rebirth square of the type of piece making the capture cannot be occupied still applies. The rule does not apply to the rebirth square of the type of piece to which the capturing piece is transformed – this square can be occupied. To illustrate using the problem: the bQ could capture the wK bacause d8 is unoccupied – but in the Diagram position cannot do so [i.e. the wK is not in check] because the bQ would be reborn as a bS on b8 and violate Isardam rules vis-a-vis the wSc6. In the Diagram position the wSc6 could move to d8 [becoming a B] without self-check but could not move to b8.
Solutions: (click to show/hide)
I. 1.Sc6-d8=B Qd2-g5=S 2.Kd4-d5 Sf3-e1=B 3.Qe7-a3=S + Bb2-c1=R #
II. 1.Kd4-e4 Qd2-e1=S 2.Rh5-h4=Q Sf3-d2=B 3.Qe7-a3=S + Bb2xa3=R[bRa3->h8] #
The solution is given by Popeye version 4.47. Version 4.61 (and 4.59) gives the following additional solutions:
None of the additional solutions are correct. In all of them Black is under no compulsion to mate on move B3 and furthermore the B3 moves given do not mate White. (Author)