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MatPlus.Net  Forum General en passant captures in Take & Make |
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| | Page: [Previous] [Next] 1 2 | | (21) Posted by Dupont Nicolas [Thursday, Oct 14, 2010 00:02] |
Sorry Kevin, I was answering to Frank. I wanted to point out that, generally speaking, when Mr X adds a new possibility to a given fairy genre F, it doesn’t become “X chess” but “F type X”. But I shouldn’t have used the “anticircé” example, which is confusing regarding to your own post.
I fully agree that T&M is a kind of anticircé (a capturing piece reborn, although not on its initial square, but along some move of the captured unit). In fact, the same reasoning applies to circé cage. We put it in the circé family as a captured piece reborn, although not on its initial square, but in a cage.
So, it is fine for me to introduce “anticircé T&M” as an extended variation of the classical T&M, where more fairy effects are allowed, and hence to delete “T&M type Dupont”, which becomes only a kind of uninteresting step between classical T&M and anticircé T&M. By the way, programming might be easier.
Your other suggestion, “circé T&M”, looks also nice. But, to keep the analogy clear (more precisely the duality, in the mathematical sense), it should perhaps be called “circé anti T&M”.
If you want to set up the full axioms, you have to be careful with some particular cases (the same kinds I encountered with circé cage, probably). For example, when you speak of “the choice of some legal move from the capturing unit”, do you consider legality before or after the capture ? e.g. is wBc1xbBb2->bBc1 allowed ? The answer is no if legality is measured before the capture (the empty move is not legal), the answer is yes if legality is measured after the capture (wBb2-c1 is legal) except of course if this move is a self check, that is if bBc1 gives check to the white King).
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