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Subject: Re: Rebel - IsiChess: Some notes

Author: Dann Corbit

Date: 11:27:29 10/21/03

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On October 21, 2003 at 14:04:28, Gerd Isenberg wrote:

>On October 21, 2003 at 13:08:18, Dann Corbit wrote:
>
>>On October 21, 2003 at 04:49:45, Gerd Isenberg wrote:
>>
>>>Thanks for your effort, Dann
>>>
>>>i believe Jeroen and Alex, that 16...b4 is already a loosing one.
>>>May be Dan Wulff's (Gandalf's Book Author) approach, to throw out all book
>>>lines, where after a short analyses absulute score is greater some threshold, is
>>>practical to avoid such book lines at all.
>>
>>I remain unconvinced that 16 .. b4 loses.  Now, it might lose.  But I have not
>>seen ANY convincing evidence that it does.
>
>I'm not sure - i still trust Jeroen's and Alex's competence and long year
>experience. And i don't think that they are playing games with us by having some
>"secret" refutation parat ;-)
>
>Ok, it always happend in the past, that some "dead" lines became playable again.
>One "hole" in such lines may let programs miss the decisive key move due to some
>very deep tactis with a rook or more less.
>
>Gerd

Don't get me wrong.  I am not saying that they are mistaken.  Many times in the
past, I have questioned either human or computer analysis.  Almost always, I am
proven wrong.  What I am saying is that I have not seen the proof.  On the other
hand, I have seen plausible alternatives.  Therefore, I continue to have some
doubts until I have been shown why.

My own opinion is that there is always *some* doubt until either a checkmate or
stalemate has been rigorously proven.

However, there are many cases where the doubt is very, very small.



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