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Subject: Re: Interesting Shredder 5 news!

Author: Uri Blass

Date: 10:44:56 10/30/00

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On October 30, 2000 at 13:09:23, James T. Walker wrote:

>On October 29, 2000 at 10:02:24, Uri Blass wrote:
>
>>On October 29, 2000 at 08:36:07, pete wrote:
>>
>>>On October 28, 2000 at 20:15:02, Uri Blass wrote:
>>>>I do not believe that it is only low branching factor.
>>>>
>>>>Genius has other problems.
>>>>
>>>>1)It does less extensions than other programs and cannot extend more than 12
>>>>plies.
>>>>
>>>>It canot see lines of more than 32 plies.
>>>>
>>>>2)There are positions that it does not understand when other programs
>>>>understand.
>>>>
>>>>Other programs worked many years about improving their evaluation when lang did
>>>>not do it and it is natural that other programs got better evaluation function
>>>>in part of the positions.
>>>>
>>>>Uri
>>>
>>>I tend to disagree , at least I suspect your point of view is very hard to prove
>>>.
>>>
>>>It does sound very logical to assume years of work on evaluation has payed off
>>>but it is very rare to see Genius judging positions in a ridiculous way .
>>
>>I expect you to see cases when Genius evaluates positions wrong if you do more
>>games.
>>
>>I saw cases when Genius did not evaluate correctly king attack.
>>It falled into a king attack against chess system tal many years ago because of
>>wrong evaluation and I expect it also to fall into king attacks against
>>gambittiger.
>>
>>It did not happen in the 3 games that you posted but it does not say that it is
>>not going to happen.
>>
>>There are cases when Genius3's evaluation is superior relative to Gambit but I
>>believe that there are also cases when it is the opposite.
>>
>>Uri
>
>Hello Uri,
>I may be wrong but I think you cannot rely on Gambit's score for positions as
>they are kind of artificial.  Similiar in my opinion to MChess pro.  Sometimes
>the scores are elevated to force the attack when it is speculation.  Only my
>opinion though.
>Jim

You cannot trust also the scores of other programs because they are not
speculative and sometimes can evaluate 0.00 without seeing that one side has a
winning attack.

Uri



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