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Subject: Re: Differences between 0x88 ,10x12 and Bitboards!?

Author: Uri Blass

Date: 12:39:51 11/19/02

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On November 19, 2002 at 15:08:13, Daniel Clausen wrote:

>On November 19, 2002 at 14:04:42, Vincent Diepeveen wrote:
>
>[snip]
>
>>i have posted some months ago and another few months before that loads
>>of examples with regard to evaluation.
>>
>>If you browse some in the search you will find it.
>
>I'm aware of that. But I can't remember that you scientifically proved that
>"bitboards are worse to implement a good eval than 0x88". (or any other board
>representation)
>
>Actually it would be a rather stupid claim to make because there's really no way
>you could prove that. (on the other hand, religions make use of the fact that
>their claims are not provable/disprovable ;)
>
>Just posting some examples where 0x88 is better than <another board
>representation> is not a proof. In fact I'd be surprised if _your_ evaluation
>would be easier/faster to implement with bitboards than with 0x88, as it would
>mainly show that you didn't make use of the advantages of your chosen board
>representation.
>
>While there are clearly inferior board-representations (like storing the board
>internally as a BMP-file ;), generally the art is to find the advantages of the
>chosen representation and make use of them. (that's not only true for chessboard
>representation but for many other things)
>
>Sargon

I have no idea which way is better but I believe that it is better to continue
in the way that you already started and not to try something completely
different.

I do not consider a possible difference of being 33% faster as important enough
to change the structure of the program because at the same time it is possible
to get improvement in other ways.

Uri



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