Author: Robert Hyatt
Date: 14:31:10 02/15/04
Go up one level in this thread
On February 15, 2004 at 17:19:03, Andreas Guettinger wrote: >>>You have if (color) >>>if (whitepawns&attacks) >>> >>>He is using if ((tmp=Pieces[col][pawn]&attacks)) >> >>That particular line is a bit different. What about _all_ the others? >> >>IE do you think that X=X+7; >> >>and >> >>X = X + (70/10); >> >>are different??? >> >>As I said, if you don't think it is a clone, that's ok by me. The original >>person asked +me+ and I gave an honest opinion after looking _carefully_. Too >>many things are the same. A few lines here and there different don't change a >>thing... >> >> >> >>>He has not different code for white and black in his swap function. >>> >>>I also see that you use p_values[(PcOnSq(target)+7) when he is using >>>pieceV(piece(from)) >> >>And you think that a significant difference? >> >> >>> >>>target to from is change of a varaible >>>but +7 to not having +7 is not a change of a varaible >>> >> >>I can take Swap() and fiddle with it for 30 minutes and change enough to pass >>your test for uniqueness. But it won't be unique or original... >> >> >> >> >>>Uri > > >Hm, so you think that the code of his swap fonction is to similar to the one of >crafty or do you mind that somebody uses the idea of SEE from crafty in his >program? I don't no the code of Danchess, so I cannot judge. I don't mind at all... > >But I think if somebody uses the idea, a swap function looks basically like a >swap function. Like an alpha-beta looks like an alpha-beta. >Determine attackers, determine defenders, sort the bunch of them add up >swap_scores and minimax thme in the end. The code will be different. How to handle x-ray attacks? Collecting all the attackers in the right order. Minimaxing the result. I have seen _several_ different SEE routines over the years, including some for bitmaps. They all do about the same thing, but not with the same code... or nearly the same code... > >As far as the eval is concerned, I agree that this is private property. > >regards >Andy
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