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Subject: Re: Closest link between a statistic and playing strength

Author: Georg v. Zimmermann

Date: 05:04:25 12/07/01

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On December 07, 2001 at 02:57:56, Severi Salminen wrote:

>>So for improving the raw performance of your own program, against only itself,
>>some of these statistics are good tools then, correct? If my eval function is
>>bad, then I should work on improving it, but my program will play better if it's
>>searching twice as deep with a bad eval function than if it's searching half as
>>deep with that same bad eval function. That's what I was really after. Improving
>>a program relative to itself, not to other programs (although I would suspect
>>that if you improved your ply depth, all other things remaining the same, that
>>the program would perform somewhat better against other programs).
>
>For developing your own program, all statistics are very useful, including NPS,
>search depth, game results... NPS is very useful speed indicator if you know
>what has changed in your program. But since we don't know about others' programs
>it is useless to compare NPS figures. It is critical to know what changes you
>made to your program and then judge if the NPS increase, depth increase or
>whatever was worth it.
>
>Severi

I agree with all the above.

One big problem is that many improvements will for example get you twice the
ply/nodes but a slightly worse performance in positional test suits. What now ,
thats the question.
One of the few good solutions is to eat the pudding.

Georg



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