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Subject: Re: Gandalf 5 test: Hiarcs 7.32, the turnover?

Author: Ulrich Tuerke

Date: 09:24:36 01/17/02

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On January 17, 2002 at 11:29:42, Uri Blass wrote:

>On January 17, 2002 at 11:00:44, Ulrich Tuerke wrote:
>
>>On January 17, 2002 at 01:30:31, Harald Faber wrote:
>>
>>>After having changed the hash size from 200MB to 56MB due to some
>>>recommendations here (104MB hash are recommended for Athlon-1000, so 56MB should
>>>be the right size for my Athlon-500), Gandalf 5 performed much better in this
>>>match and reached a 4.5-5.5. Although the start was all but convincing with
>>>1.0-4.0. One does not forget here that Hiarcs 7.32 is a bit weaker and less
>>>dangerous opponent than Junior 7, Shredder 6 and Fritz 7a, it is still unclear
>>>whether Gandalf plays better with this hash size. IMO this should not make such
>>>a difference, but who knows? Electricians say "Women and currency go strange
>>>ways." :-)
>>>
>>>Next match starting in a few minutes is vs. Fritz 6a.
>>
>>I think, you shouldn't assume a causal relation between shrinking the hash table
>>size and the results after this.
>>
>>Assume you would have gone out to wash your hands, and after you're back Gandalf
>>does the turnover. Would you think that washing your hands was the reason for
>>the improvement. -:)
>>
>>We shouldn't be fooled by statistical fluctuations.
>>
>>Uli
>
>It is different.
>
>It is clear that washing your head does not change the strength of the program.
>It is not clear that gandalf has no bug with too big hash tables.
>
>We saw no proof that gandalf is better with lower hash tables but we saw enough
>to suspect that it may be the reason.
>
>Uri

I just think the chance, that Harald had just observed a statistical fluctuation
is overwhelmingly large.

Of course you can't exclude with 100 percent certainty some reaL peculiar
program bug.

Uli



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