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Subject: Re: mate-in-13

Author: F. Huber

Date: 13:19:24 04/16/05

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On April 16, 2005 at 16:11:13, John Merlino wrote:

>On April 16, 2005 at 15:48:43, F. Huber wrote:
>
>>On April 16, 2005 at 15:02:50, Mike Byrne wrote:
>>
>>>while searching for info on Ruffian - found this old problem that Ruffian 1.0.1
>>>solved very quickly
>>>
>>>Crafty 19.20
>>>Dual Opterons
>>>
>>>White(1): [d]8/8/pp6/2pp2p1/3p2Pk/3P1K1P/5PP1/8 b - - 0 1
>>
>>The fastest ´brute force´ mate for ChestUCI in my collection so far! :-)
>>
>>ChestUCI Ver.4.1:
>>CPU: Celeron 400MHz
>>FEN: 8/8/pp6/2pp2p1/3p2Pk/3P1K1P/5PP1/8 b - -
>>Search for Mate in -13 ...  (Hash=64MB)
>>Search completed ...  (Time=51.24s)
>>Mate in -13 found !  (00:51)
>>Pa6-a5 --> 1.Ke2 c4 2.Kf1 c3 3.Kg1 c2 4.Kh2 c1Q 5.g3#
>>Pb6-b5 --> 1.Ke2 c4 2.Kf1 c3 3.Kg1 c2 4.Kh2 c1Q 5.g3#
>>2 Solutions  (Mate in -5)
>>Pc5-c4 --> 1.Ke2 cxd3+ 2.Kxd3 b5 3.Ke2 d3+ 4.Kxd3 d4 5.Ke2 d3+ 6.Kxd3 b4 7.Ke2
>>b3 8.Kf1 b2 9.Kg1 b1Q+ 10.Kh2 Qg1+ 11.Kxg1 a5 12.Kh2 a4 13.g3#
>>1 Solution  (Mate in -13)
>>
>>Regards,
>>Franz.
>
>An interesting test. In the CM GUI, you can't search for a brute force mate for
>the side that is NOT on the move, so first I forced 1...c4. Yes, I know it's
>cheating.... :-)
>
>It then took CM9_R1 0:12 to find the Mate in 13 in brute force mode.
>
>jm

WOW, interesting news: John Merlino is _also_ cheating! :-)))

Regards,
Franz.



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