Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: One mate to solve...

Author: leonid

Date: 15:30:53 04/22/01

Go up one level in this thread


On April 22, 2001 at 16:25:50, Christophe Theron wrote:

>On April 22, 2001 at 16:03:31, Jonas Cohonas wrote:
>
>>New position
>>2R2bNn/Rp1n1k1b/1q1ppB1p/1Np1p1p1/2P1P2P/3P2PB/4Q2K/8 w - - 0 1
>>
>>Analysis by Deep Junior 6.0:
>>
>>1.Bxg5 hxg5 2.Qf2+ Kxg8 3.Bxe6+ Kg7 4.Bxd7
>>  +-  (7.47)   Depth: 3   00:00:00  1kN
>>1.Bd8 Qxa7 2.Nxa7 Kxg8
>>  +-  (10.67)   Depth: 3   00:00:00  1kN
>>1.Bd8!
>>  +-  (10.97)   Depth: 6   00:00:00  7kN
>>1.Bd8! Qxa7 2.Nxa7 Bxg8 3.Bxe6+ Kxe6 4.Qg4+ Kf7 5.Qxd7+ Kg6 6.Qxb7
>>  +-  (11.53)   Depth: 6   00:00:00  13kN
>>1.Bxe6+!
>>  +-  (11.54)   Depth: 6   00:00:00  35kN
>>1.Bxe6+! Kxe6 2.Qg4+ Kf7 3.Qxd7+ Kg6 4.Rxf8 Bxg8 5.Rxg8+ Kh5 6.Qe8+ Kg4 7.Rxh8
>>gxh4
>>  +-  (17.27)   Depth: 6   00:00:00  66kN
>>1.Bxe6+!
>>  +-  (17.57)   Depth: 9   00:00:00  104kN
>>1.Bxe6+! Kxe6 2.Qg4+ Kf7 3.Qxd7+ Kg6 4.g4 h5 5.Rxf8 hxg4 6.h5+ Kxh5 7.Qxh7#
>>  +-  (#7)   Depth: 9   00:00:00  526kN
>>1.Bxe6+! Kxe6 2.Qg4+ Kf7 3.Qxd7+ Kg6 4.g4 h5 5.Rxf8 hxg4 6.h5+ Kxh5 7.Qxh7#
>>  +-  (#7)   Depth: 9   00:00:01  1250kN
>>
>>(, MyTown 23.04.2001)
>>
>>Deep Junior needs 1 second and the nodecount is obvious :-)
>>
>>also check out the nodecount on goliath :-)
>>
>>,c - Nimzo 8
>>2R2bNn/Rp1n1k1b/1q1ppB1p/1Np1p1p1/2P1P2P/3P2PB/4Q2K/8 w - - 0 1
>>
>>Analysis by Goliath Light:
>>
>>1.Bd8 Qxa7 2.Nxa7 Bxg8 3.hxg5
>>  +-  (14.72)   Depth: 6/16   00:00:00
>>1.Bd8 Qxa7 2.Nxa7 Bxg8 3.Qh5+ Ng6 4.hxg5
>>  +-  (14.90)   Depth: 6/16   00:00:00  45kN
>>1.Bxe6+
>>  +-  (15.03)   Depth: 6/16   00:00:00  46kN
>>1.Bxe6+ Kxe6 2.Qg4+ Bf5 3.Qxf5+ Kf7 4.Bxh8+ Kxg8 5.Qxd7 gxh4
>>  +-  (16.94)   Depth: 6/17   00:00:00  68kN
>>1.Bxe6+ Kxe6 2.Qg4+ Bf5 3.Qxf5+ Kf7 4.Bxh8+ Kxg8 5.Qxd7 gxh4
>>  +-  (16.94)   Depth: 7/17   00:00:00  172kN
>>1.Bxe6+ Kxe6 2.Qg4+ Bf5 3.Qxf5+ Kf7 4.Bxh8+ Kxg8 5.Qxd7 gxh4
>>  +-  (17.27)   Depth: 7/17   00:00:00  181kN
>>1.Bxe6+ Kxe6 2.Qg4+ Bf5 3.Qxf5+ Kf7 4.Bxh8+ Kxg8 5.Qxd7 gxh4
>>  +-  (18.23)   Depth: 7/17   00:00:00  186kN
>>1.Bxe6+
>>  +-  (18.23)   Depth: 7/20   00:00:00  264kN
>>1.Qh5+
>>  +-  (18.47)   Depth: 7/21   00:00:00  362kN
>>1.Qh5+ Ng6 2.Bxe6+ Kxe6 3.Qg4+ Kf7 4.Qxd7+ Be7 5.Qe8+ Ke6 6.Nc7+ Qxc7 7.Rxc7
>>Bxg8 8.Bxe7 Nxe7 9.Rxe7+ Kf6 10.hxg5+ hxg5 11.Raxb7
>>  +-  (22.95)   Depth: 7/23   00:00:00  604kN
>>1.Qh5+ Ng6 2.Bxe6+ Kxe6 3.Qg4+ Kf7 4.Qxd7+ Be7 5.Qe8+ Ke6 6.Nc7+ Qxc7 7.Rxc7
>>Bxg8 8.Bxe7 Nxe7 9.Rxe7+ Kf6 10.hxg5+ hxg5 11.Raxb7
>>  +-  (22.95)   Depth: 8/23   00:00:00  833kN
>>1.Qh5+ Ng6 2.Bxe6+ Kxe6 3.Qg4+ Kf7 4.Qxd7+ Be7 5.Qe8+ Ke6 6.Nc7+ Qxc7 7.Rxc7
>>Bxg8 8.Bxe7 Nxe7 9.Rxe7+ Kf6 10.hxg5+ hxg5 11.Raxb7
>>  +-  (23.33)   Depth: 8/28   00:00:00  1091kN
>>1.Qh5+ Ng6 2.Bxe6+ Kxe6 3.Qg4+ Kf7 4.Qxd7+ Be7 5.Qe8+ Ke6 6.Nc7+ Qxc7 7.Rxc7
>>Bxg8 8.Bxe7 Nxe7 9.Rxe7+ Kf6 10.hxg5+ hxg5 11.Raxb7
>>  +-  (24.13)   Depth: 8/28   00:00:00  1685kN
>>1.Qh5+ Ng6 2.Bxe6+
>>  +-  (#9)   Depth: 8/28   00:00:01  4487kN
>>1.Bxe6+ Kxe6 2.Qg4+ Kf7 3.Qxd7+ Kg6 4.Qf5+ Kh5 5.g4+ Kxh4 6.Bxg5+ hxg5 7.Qf2+
>>Kxg4 8.Nf6#
>>  +-  (#8)   Depth: 8/28   00:00:02  6765kN
>>
>>(, MyTown 23.04.2001)
>
>
>
>
>But GL has not found the mate in 7. It will take more time to find mate in 7.
>
>I don't care much about the NPS. If I disable all my intelligent selective
>pruning systems and high level evaluation, I get a similar NPS.
>
>
>
>    Christophe

What surpised me very much (just few days ago) is to find that in my mate solver
selective demonstrate much higher NPS that brute force search. It is true that
it is not that relevant for the quality of the search but is very curious. I
never expected this way! In other part of my program opposit is true. Selective
search have always lower NPS that brute force search. Specific to my program
logic or normal for every program? I really don't know.

Leonid.





This page took 0.04 seconds to execute

Last modified: Thu, 07 Jul 11 08:48:38 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.