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Subject: Re: Bitbases - yace, scorpio, gambitfruit

Author: Daniel Shawul

Date: 02:07:25 12/06/05

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On December 06, 2005 at 04:58:01, Ryan B. wrote:

>On December 06, 2005 at 04:41:25, Bernhard Bauer wrote:
>
>>Hi,
>>the use of bitbases looks promising. Gambitfruit makes use of Scorpio bitbases.
>>Dieter Buersner uses bitbases in yace too.
>>Dieter has more files and they are smaller than the scorpio bitbases.
>>Would it be possible for the author of gambitfruit to use the bitbases from
>>yace? Is there kind of a standard in bitbases?
>>Kind regards
>>Bernhard
>
>I think Danial plans on doing 5 piece bitbases and when they are ready I plan on
>supporting them in Gambit Fruit.  I hope people notice what Danial has done with
>making his bitbases easy to use and other engines start picking them up.  The
>way I see it maybe some idea I use in Gambit Fruit will be seen by another
>programmer and help them in some way but likely if a program is not already
>using bitbases it can benefit from the use of Danial's easy to use bitbases.
>
>Ryan
  Thanks for the support. I would have used some body else's bitbases myself
if i find a free one. Johan Melin (Knight Dreamer) has a similar DLL which can
be used by others. But it is not completely free though.

For Bernhard:
 AFAIK yace bitbases are not public. And scorpio bitbases are not larger than
yace's. Scorpio takes 18mb, yace takes 21mb, but that is insignificant.
For example the compressed bitbases that i have now for 4 pieces are 6mb large.
But that hurts speed of the engine. Knight Dreamers bitbases are 1mb in size

Engines that i know have bitbases:
    KnightDreamer,Yace,Kiwi,Delfi,SlowChess,glaurung,GLC

best
daniel




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