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Subject: Re: Bitbases - yace, scorpio, gambitfruit

Author: Bernhard Bauer

Date: 02:43:03 12/06/05

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On December 06, 2005 at 05:07:25, Daniel Shawul wrote:

>On December 06, 2005 at 04:58:01, Ryan B. wrote:
>>On December 06, 2005 at 04:41:25, Bernhard Bauer wrote:
>>>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
>>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.
>  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

I had a closer look. Yace uses 2 files, whereas Scorpio has only 1 file.
So you are right.
Thanks for clarification.
Kind regards

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