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Subject: Re: One mate to solve...

Author: Uri Blass

Date: 03:26:59 07/13/01

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On July 12, 2001 at 14:07:59, leonid wrote:

>Hi!
>
>If you like, you can solve this mate:
>
>[D]krqn4/rqP3qq/n1QQ4/bbNNBBqq/q1QQ4/Q1P3qq/RQ6/KRN5 w - -
>
>I found very intriguing few anomalies about this position. NPS (node/per/second)
>rate was very high while braching factor was unusually bad. This is true for
>brute force search. NPS was 912k (8 plys search) when it could be expected as
>low as 45k. When I went to try this position on Rebel 10, I found that Rebel's
>NPS is, for the first time, lower that mine. Genius 4 time, for 8 plys search,
>was almost the same as mine. Only from 10 plys my program started gaining some
>modest distance. I never could see nothing like this before while verifying my
>"normal" positions.
>
>Please indicate your result,
>
>Thanks,
>Leonid.

Chessmaster6000(ss=10) PIII850
 Nxb7 Mate in 9
time 5 minutes and 3 seconds.

It could see that Nb7 leads to mate in less than 4.5 minutes but it was only
mate in 11.

Uri



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