Definitions: (click to show/hide)
Chameleon Circe: When a piece is captured it transforms according to the scheme S>B>R>Q>S, then it is replaced on its Circe rebirth square (game-array squares, of the same colour in the case of pieces, the file of capture in the case of pawns, the promotion square of the file of capture in the case of fairy pieces.).
Neutral piece: Belongs to whichever side chooses to use it. It can therefore be moved or captured by White or Black, and in Circe it is reborn according to capture. A King may not be moved onto a square controlled by a neutral piece, because of self-check.
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No.1049 Geoff Foster
Australia
original – 19.04.2016
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Solutions: (click to show/hide)
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white Kh5
black Ka4
neutral Se4g6
h#4 (1+1+2)
b) vertical mirror (a1↔h1)
Chameleon Circe
Neutral Se4, Sg6
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a)
1.nSe4-f6 + Kh5*g6[+nBc8] 2.nBc8-e6 Kg6*f6[+nBf8] {
} 3.nBf8-e7 + Kf6*e7[+nRh8] 4.nRh8-b8 Ke7*e6[+nRa8] #
b) mirror a1<-->h1
1.Kh4-h5 Ka5*b6[+nBf8] 2.nBf8-c5 + Kb6*c5[+nRh8] + {
} 3.nRh8-g8 Kc5*d4[+nBf8] 4.nBf8-c5 + Kd4*c5[+nRh8] # {
(C+ by Popeye 4.73 & WinChloe 3.33)}
The wK makes 4 captures in each solution. In (a) 5.nRxb8[nQd1]? and in (b) 5.nRxg8[nQd1]?
are illegal because of self-check. That is why the bK must be on h5 in (b). (Author)
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Two symetrical mates but strangely two different solutions !
Well done Geoff
and C+ also Winchloe
Good Geoff.
(You wrote previously (!): Nevertheless I will attempt a definition, even though there doesn’t seem much point, because as far as I am aware no problem using this condition has ever been composed).
Now your next task could be to add to Circe Chameleon (or to Circe Einstein) either Chameleon or Einstein.
Then when piece A captures piece B both would change instead just the B piece.
This would be nice to see! – but difficult to effect.
Dear Peter,
It’s already been done! When we had our discussion I failed to notice that Circe Einstein is closely related to ChameleonCirce, which is a fairly common fairy condition (190 problems in WinChloe). When the Popeye team created the new format for Circe/AnitCirce, they added some other transformation sequences, such as Einstein.
Here is an example, with all pieces being neutral (including the King):
Michael Grushko & Paul Raican
Quartz 2012
h#4.5 (b) nPh4>f7
neutral Kf8 Ph4 Pe3 Pg2
ChameleonChess
ChameleonCirce
a) 1…nPh4-h5 2.nPg2-g1=nQ nQg1-f2=nS 3.nPe3xf2[+nBc1] nKf8-g8 4.nPf2-f1=nR nPh5-h6 5.nRf1-f6=nQ nBc1xh6=nR[+nPh7] #
b) 1…nPe3-e4 2.nPg2-g1=nQ nPe4-e5 3.nQg1-g8=nS nPf7xg8=nB[+nBc8] 4.nBc8-g4=nR nPe5-e6 5.nRg4-g6=nQ nBg8xe6=nR[+nPe7] #
Of course it would be more interesting to have chameleon pieces (not pawns) in the captures, so that both pieces would be transformed each time.
Thank you Geoff.
This raises the question of nomenclature that I wrote about at some length (in comment to my 1045).
I wrote:
QUOTE
If Popeye did as I suggested namely:
(1) Make entering as input Circe Einstein or Einstein Circe mean the same thing
(2) Rename the present Circe Einstein to CirceEinstein
then in practical terms:
Circe and Einstein could be entered in any order 99% of the time.
CirceEinstein would be entered 1% of the time by composers who desired that condition.
END OF QUOTE
It seems, from what you have now written, that at present the different inputs ChameleonCirce and Circe Chameleon mean the same thing.
THIS PECISELY MAKES MY POINT.
By the same token: There should be an input EinsteinCirce.
The present set-up of having (ridiculous) inputs of Circe Einstein and Circe Chameleon could and should be scrapped. The inputs should be ChameleonCirce and EinsteinCirce.