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Subject: Re: Here: It is a mate in 18

Author: Mike S.

Date: 22:40:59 01/30/06

Go up one level in this thread


On January 30, 2006 at 11:49:28, Robert Hyatt wrote:

>On January 30, 2006 at 10:20:59, chandler yergin wrote:
>
>>On January 30, 2006 at 06:31:01, Mike S. wrote:

>>>>>(...)

8/8/8/6N1/8/3kn3/4nKn1/8 b - - 0 1

http://chess.jaet.org/cgi-bin/dtx

(...)

>>If Shredder can't find at Depth 32/66 it's not there.
>>It has EGTB's too.
>
>This is a 6 piece ending.  Do you have the 6 piece files?  If so you would know
>this is a _forced_ mate.  Since you don't have them, you don't know a thing
>other than what Shredder knows, and since it can't search deep enough to see the
>forced mate, it doesn't have a clue here.
>
>For the last time, _stop_ arguing just for the sake of arguing...

:) Factual things and arguing are not very compatible anyway...

Btw., the link I gave above has endgame tables for four different metrics
(DTC/DTM/DTZ/DTZ50) at the same time and shows their output in a table. It just
don't have 6-piece tables for all metrics and for all endings. I think they are
complete for all 5-piece endings, each.

It is useful sometimes for DTM/DTC comparisons, which is a difficult topic when
it is about max. move numbers of a win or mate in a specific position. Once I
was able to help correcting a german wikipedia endgame article, which was being
discussed because the move number given in an RB-R endgame analysis of GM Mednis
(59 moves) could not be verified with the Nalimov tables. Of course, the key to
it was that Mednis had used the Thompson tables in 1995, and so his analysis was
DTC-based. He skipped a variation with "best" defense against mate (65 moves),
where the conversion happened earlier. It obviously didn't make sense from a
GM's analysis viewpoint, because it was KRB-RK to KR-K or even to KRB-K, in that
variation.

http://de.wikipedia.org/wiki/Endspiel-Datenbank_beim_Schach#Beispiel
http://de.wikipedia.org/wiki/Diskussion:Endspiel-Datenbank_beim_Schach

Regards,
Mike Scheidl



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