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Subject: Re: Behind deep Blue

Author: Uri Blass

Date: 09:12:26 10/20/02

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On October 20, 2002 at 11:29:40, Jeremiah Penery wrote:

>On October 20, 2002 at 11:20:55, Uri Blass wrote:
>
>>On October 20, 2002 at 11:00:42, Jeremiah Penery wrote:
>>
>>>On October 20, 2002 at 03:41:56, Uri Blass wrote:
>>>
>>>>On October 19, 2002 at 21:44:49, Fernando Villegas wrote:
>>>>
>>>>>I have just finished the book by Feng-Hsiung Hsu. In just a shot, from after
>>>>>lunch to this time, meal time. Very interesting. You cannot stop he reading.
>>>>>First big impression: if this guy and his team had worked just one year more on
>>>>>Deep Blue, Garry has been crushed to ashes, to atoms. Yes, because once and
>>>>>again Deep Blue appears as an uncomplete device full of bugs and problems,
>>>>
>>>>
>>>>I am surprised that after this people still believe that it's evaluation was
>>>>better than the evaluation of Deep Fritz of today.
>>>
>>>I'm surprised people still think it's evaluation was worse than Fritz of today.
>>>But it doesn't matter - I think DB will never play again (stupid IBM), so
>>>neither side can EVER win the argument.
>>
>>The main point is the following:
>>"Deep Blue appears as an uncomplete device full of bugs and problems"
>
>They did have a lot of bugs over the course of the development, but what does
>that have to do with the quality of the evaluation?
>
>>I do not believe that something that is full of bugs and problems can have
>>better evaluation than Deep Fritz that was tested more seriously.
>
>Almost all of the 'bugs' were not in the evaluation.

I understood from the discussion that they discovered bugs including bugs in the
evaluation in games 1 and 2 of the match against kasparov and fixed them for the
rest of the match.

Maybe I undertsood wrong and I did not read Hsu's book.
I do not want to support Hsu after he left computer chess.

I think to buy it only if Hsu returns to computer chess.

>
>Should I say Fritz has big evaluation 'bugs' because it completely misevaluates
>many positions?  Should that be cause to say Fritz has worse evaluation than
>some other program(s)?

No
It is different.

Fritz may evaluate wrong something because of lack of knowledge but
I believe that the demage from wrong knowledge is often bigger than the demage
from lack of knowledge.

Uri



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