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Subject: Re: Cleaned ECM aka WACII revisited

Author: José Carlos

Date: 09:15:35 09/23/01

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On September 23, 2001 at 11:02:09, Uri Blass wrote:

>On September 23, 2001 at 08:54:02, Gian-Carlo Pascutto wrote:
>
>>On September 23, 2001 at 05:29:51, Peter Berger wrote:
>>
>>>
>>>[D]2b3k1/p4ppp/7q/2Q5/8/P3r1P1/1r4BP/R3R1K1 b - - bm Bb7; id "ECM.1197";
>>>
>>>This one looks wrong.
>>
>>Nope...Bb7 is the fastest mate.
>
>What is the importance of finding the fastest mate.
>There are programs that stop to search when they find one mate and I do not see
>it as important for games if they know to find a shorter mate in the next move.

  This is wrong, partially. Of course playing programs are not mate provers, but
if you stop the search in _any_ mate, you can play a check that leads to mate in
5. The next move, check again, which leads to mate in 5. Then, another move that
leads to mate in 6, and so on... You might lose on time meanwhile.

  José C.

>It is also possible that Bb7 is a draw by the 50 move rule when Rxg2+ is not a
>draw by the 50 move rule so if I get the position without knowing the history I
>am going to prefer Rxg2+
>
>Uri



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