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Subject: Re: Mate to solve for champions...

Author: leonid

Date: 04:55:26 05/01/01

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On May 01, 2001 at 01:02:33, Paul Byrne wrote:

>On April 29, 2001 at 07:32:15, leonid wrote:
>
>>Hello!
>>
>>I know that I should never indicate here any position like this, but it is just
>>too seductive! Only really dedicated man or highly performant mate solver can
>>crunch it.
>>
>>[D]Qrbqkbr1/Qn3qPP/NQqQq1nB/1qNqQBq1/1Qq1q2Q/8/3RR3/4K3 w - -
>>
>>Please indicate your result.
>>
>>Thanks,
>>Leonid.
>
>That was a tough one!  My PN search went through 512MB of memory without solving
>it.  PN2 got Qbxd8+ winning in 1316.46 seconds (100043829 nodes) -- the PN2 code

Hi, Paul!

What is PN2?

Your move is what mine found.

Your solution was quick compared with mine. I actually had the impression that
this position contain the mate and asked to search this position. Very deep
selective search, 13 moves deep. Left my solver thinking in the night. Celeron
600Mhz. No hash. It took almost 4 hours (3 h 56 min) to solve in 13 moves. But
at what depth your found? Maybe your said that mate existe in 12 or even 11.

Cheers,
Leonid.


>is set up for suicide chess though and could probably be sped up a good bit for
>regular chess.
>
>-paul



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