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Subject: Re: Bitbases - yace, scorpio, gambitfruit

Author: Zappa

Date: 11:47:12 12/06/05

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On December 06, 2005 at 14:19:13, Ryan B. wrote:

>On December 06, 2005 at 13:16:24, Zappa wrote:
>
>>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:
>>>>
>>>>>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
>>
>>How does KD manage to get so much smaller?
>>
>>anthony
>
>
>you mean what type of compression?

Well your compressed bitbases are 6MB, but KDs are 1MB . . . so he's doing
something right.

anthony



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