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Subject: Re: Management Of Evaluation Knowledge - How Does Crafty Do It?

Author: Graham Laight

Date: 17:03:26 07/22/00

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On July 22, 2000 at 18:19:37, Ralf Elvsén wrote:

>On July 22, 2000 at 13:18:54, Graham Laight wrote:
>
>>On July 22, 2000 at 07:26:12, Ralf Elvsén wrote:
>>
>>>On July 22, 2000 at 04:47:14, Graham Laight wrote:
>>>
>>>>Looks like Ed doesn't want to continue this thread any more, which is
>>>>understandable, because if he does, he could end up revealing more about how he
>>>>does evaluation than he really wants to.
>>>>
>>>>So - if anyone reading this knows how knowledge in Crafty is organised, could
>>>>they post an overview here, please, so that we can continue this thread?
>>>>
>>>>Thanks for your help with this.
>>>>
>>>>-g
>>>>
>>>
>>>You can download the source code and look for yourself. I know
>>>roughly how the program works, but don't feel qualified
>>>to answer your question.
>>>
>>>Ralf
>>
>>OK - I'll look for it when I've got a spare moment (next week).
>>
>>In the meantime, please feel free to write a brief overview here. As long as you
>>don't claim to be an authorative expert, I'm sure none of us will mind if you're
>>not 100% accurate!
>>
>>-g
>
>I think I'll pass. I don't quite understand what you're
>looking for since yours and Ed's discussion was over my head.
>But promise to tell us what conclusions you
>reached. I for one is interested. Btw, I hope you know how a
>chess program is organized? Otherwise I'll be glad to help you as
>well as I can.
>
>Ralf

To save me a bit of time, can you tell me where I can download the source code
for Crafty, please?

Thanks.

Btw, what I'm after at this stage is nothing more than an overview of how the
evaluation is done.

For example, it might be (and I hope I'm proven wrong on this!) that it's
nothing more than, for each position evaluated, a chunk of code asks if a
particular positional aspect (e.g. past pawn) is present, another piece asks if
the next positional aspect is present, and so on.

Any kind of answer from anyone would be useful to get us started here - I don't
think any of us will mind if the first poster is not very accurate. I think that
once the ice is broken, we'll start to home in on what's happening fairly
quickly.

-g



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