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Subject: Re: Some facts about Deep Thought / Deep Blue

Author: Uri Blass

Date: 08:22:14 08/29/01

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On August 29, 2001 at 09:33:08, Robert Hyatt wrote:

>On August 29, 2001 at 08:29:28, Erkki Malkamaki wrote:
>
>
>While the information is both good, and old, it won't help the argument.
>A few are not going to let some facts get in their way when they want to
>bash the machine or the "team" of developers...
>
>:(

The only facts that can convince me is an anlaysis of the logfiles.

Can you show me one main line of deeper blue
that the best chess programs need many hours to get?

My analysis suggest that deeper blue is 2-3 times faster than
Deep Fritz pIII800 in finding some main lines.

I am sure that if we analyze every position
that Deeper blue pondered for some hours on fast PC we can find
more positions when top programs find main lines that
begin in the same moves as the main line of deeper blue.

The interesting question is what is the speed ratio in these cases
If the speed ratio is the same as the speed ratio that I found then
it means that deeper blue is not strong.

If in most of the cases when top programs find similiar main lines
the speed ratio is at least 100 then it means that deeper blue
was probably stronger then my impression.

Unfortunately I found only one volunteer to help me to
analyze the positions that deeper blue pondered and
I am not going to use more than 20 hours of computer time
per week to analyze.

Uri



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