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Subject: Re: Egtb mates and

Author: Paul

Date: 18:10:54 02/02/01

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On February 02, 2001 at 20:45:01, Dieter Buerssner wrote:

>On February 02, 2001 at 13:46:34, Paul wrote:
>
>>different programs find different mates with egtb's or without, that's because
>>the trees they're searching have a different shape. Some extend some lines
>>deeper, others other lines. The only time they should definitely agree about the
>>mate is when they see an egtb mate at the root position!
>
>I totally agree here.
>
>>Otherwise it's mostly an upper limit.
>
>I don't know, what you exactly mean by mostly, but I believe, this is not
>totally correct. I think, especially with EGTB mates, it is quite possible
>that it is not an upper limit, and that with higher depth the opponent may
>by able to find a refutation, that delays the mate. But after thinking about
>this for some time, my head is spinning ...
>So, obviously, I can be wrong.
>

Hi Dieter ...

Is there a difference according to you between 'normal' mates found by a search
without using EGTB's, and mates found by a search that is using EGTB's? If so,
what? And if not, then normal non-EGTB-search-mates are not an upper bound?

Groetjes,
Paul



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