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Subject: Re: Very easy mate to solve.

Author: leonid

Date: 17:23:43 12/22/01

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On December 22, 2001 at 17:21:52, Heiner Marxen wrote:

>On December 22, 2001 at 09:21:12, leonid wrote:
>
>>Hi!
>>
>>This one is very accessible:
>>
>>[D]2qQQq2/r6P/b1PqqR1N/r6B/n1BRQQ1B/q6k/q1NKNP1q/bq4qn w - -
>
>According to Chest this is a mate in 9.  And yes, it is easy: just 101 seconds
>on my K7/600:

Hi, Heiner!

Your time look like very good. When I saw your time I wanted to go back and see
my for nine moves for brute force, but finally forgot to try this. Had very busy
day with my work that I brought home.

At least, time for brute force up to 8 moves is:

Moves           Time          Branching factor             NPS

4               0.82 sec                                   91k
                              6.6
5               5.43 sec                                   71k
                              5.8
6               31.8 sec                                   59k
                              4.97
7               2 min 35 sec                               51k
                              4.13
8               10 min 41 sec                              51k

Cheers,
Leonid.

>PV: Q8xe6+ Qdxe6 Rd3+ Ng3 Bxe6+ Qaxe6 Bg4+ Qxg4 Qxg4+ Qxg4 Qxg4+ Kg2 Qf3+ Kh3
>Nf4+ Kxh4 Qg4#
>
>The second one is not yet ready :-)
>
>Cheers,
>Heiner

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