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Subject: Re: The reason that gandalf is a good program for analysis

Author: Peter Fendrich

Date: 07:31:15 11/24/00

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On November 24, 2000 at 10:02:04, Uri Blass wrote:

>On November 24, 2000 at 09:05:15, Peter Fendrich wrote:
>
>>On November 24, 2000 at 02:47:09, Uri Blass wrote:
>>
>>>On November 23, 2000 at 19:06:29, Peter Fendrich wrote:
>>>
>>>>On November 23, 2000 at 16:10:54, Uri Blass wrote:
>>>>
>>>>>On November 23, 2000 at 12:33:12, Peter Fendrich wrote:
>>>>>
>>>>>>On November 22, 2000 at 12:10:18, Uri Blass wrote:
>>>>>>
>>>>
>>
>>-- snip --
>>>The reason is simply for analysis of correspondence games.
>>>
>>>I generate a small tree of moves and I want to use the evaluations after search
>>>in the leaves of the tree to decide about my move.
>>>
>>>If I use a preprocessor I cannot compare between the evaluation in different
>>>leaves because they are based on different tables.
>>>
>>>If I do not use a preprocessor I can do it.
>>>
>>>Uri
>>
>>In that case I think you definition is perfectly allright.
>>Even small gradually changes between rootnodes will give
>>different evaluations, not comparable beteween rootnodes.
>>Terra is preprocessing!
>>Another thought: These numbers can't be of much value in corr. games. I mean the
>>positional/strategic knowledge in chess programs isn't much to rely on.
>
>
>I think that the positional knowledge of myself is also not much to rely on.
>If I think that the evaluation of programs is wrong then I try to generate the
>tree that is going to convince the program that it is wrong.
>
>If I fail to generate the relevant tree then probably my evaluation is the
>wrong one.
>
>>When material is the difference however, then the preprocessing has no impact
>>anyway.
>
>I think that there are cases when the evaluation is changed by a pawn because of
>preprocessing so preprocessing may influence also in this case.

Absolutely not in my program...
The evaluation might change even more, but the contribution from preprocessing
solely, will never be by that much. Maybe after 10 more moves ahead in the game.

I can't imgine that it is a good strategy to let the preprocessed information
affect the evaluation that much between two adjecent game moves. The program
will aim for one thing at move x and something completely different at move x+1,
even if the opponent answered with the expected move.

//Peter

>
>Uri



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