Author: Christophe Theron
Date: 11:11:19 07/08/02
Go up one level in this thread
On July 08, 2002 at 13:27:15, Robert Hyatt wrote:
>On July 08, 2002 at 12:48:58, Sune Fischer wrote:
>
>>On July 08, 2002 at 11:34:36, Robert Hyatt wrote:
>>
>>>>I too am a DB fan. Just like Bob.
>>>>
>>>>But I actually agree with you here. I don't think DB did anything
>>>>*spectacular*.
>>>
>>>I totally disagree. Their speed _was_ "spectacular". And that was _the_
>>>point of Deep Blue, after all. Not the point everyone _wants_ to be the
>>>point of deep blue, but _the point_ the team developed over 10 years...
>>>
>>
>>Here is a crazy thought, why not simulate DB?
>>Given all the papers, I think it should be possible to modify Craft to use the
>>same eval and extensions. We turn off hashing, nullmove, SEE and whatever DB
>>didn't have. Then we find a slow machine for Tiger and a super fast one for
>>Crafty, so Crafty (in DB-mode) has a 200 nps fold advantage.
>>
>>Ok lot of work, but seems this is the never ending story :)
>>
>>-S.
>
>
>This would be great if we had some of the DB guys helping. Unfortunately,
>while they revealed a lot about various parts of DB, there is no single
>comprehensive source paper to use as a reference. IE what are those 8,000
>unique eval terms in DB (some of those terms actually represent a matrix with
>multiple values so it is actually more complex than that)?
Sorry but the "8000" includes every entry of every matrix.
It's like saying that a piece square table program is composed of 768 unique
eval terms (64 squares x 6 piece types x 2 colors).
If I count this way, I guess that Chess Tiger must have something like 50000
unique eval terms... :-)
Christophe
> Ditto for some of
>their search algorithms. They have given lots of 'hints' about things, but
>significant implementation details are not available.
>
>IE something like trying to build a F-1 by looking at it run around the track.
>There are _significant_ details that are not readily apparent from such
>observations...
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