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Subject: Re: Evaluation Autotuning

Author: Robert Hyatt

Date: 13:23:29 06/28/04

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On June 28, 2004 at 15:34:59, Joachim Rang wrote:

>On June 28, 2004 at 15:25:31, Robert Hyatt wrote:
>
>>On June 28, 2004 at 14:20:29, Joachim Rang wrote:
>>
>>>On June 28, 2004 at 12:43:10, Robert Hyatt wrote:
>>>
>>>>On June 28, 2004 at 12:37:42, Dan Honeycutt wrote:
>>>>
>>>>>On June 28, 2004 at 08:54:00, Anthony Cozzie wrote:
>>>>>
>>>>>
>>>>>>settings, and then N games with the new settings.  I am only really interested
>>>>>>in longer timecontrols: 20 min + on an Athlon 2.0G or so (70 min on P-650, etc),
>>>>>
>>>>>
>>>>>Why long time controls?  I thought you could test evaluation with shorter time
>>>>>controls, search needed longer (or varied) time controls.  Am I out in left
>>>>>field?
>>>>>
>>>>>Dan H.
>>>>
>>>>
>>>>My personal belief is that longer controls are better.  Short games rely heavily
>>>>on the search, and leaves a better chance for random luck to influence the
>>>>outcome.  Deeper searches tend to make fewer tactical mistakes, leaving the
>>>>outcome to the quality of the evaluation....
>>>
>>>I don't think so, the randomness of tactical shots which is certainly present in
>>>short time controls will be distributed according to the strength of the search
>>>_and_ evaluation of the engines. I see no reason to believe that on shorter time
>>>controls _random_ luch should play a significant role.
>>>
>>>regards Joachim
>>
>>
>>By definition, "tactics" has nothing to do with "evaluation".  Tactics is
>>discovered by the search.  Shallow searches overlook too much...
>
>
>I agree, but if a program has a good mobility evaluation and/or a good passer
>estimate it will place its pieces and push its passers to the squares where it
>is more likely to find tactics even with shallow search.
>
>regards Joachim

Or push those passers to squares where they appear safe in a shallow search, but
are lost in a deeper search.  That's the issue...




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