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Subject: Re: position

Author: Peter Kappler

Date: 15:01:47 06/09/02

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On June 09, 2002 at 03:34:26, Uri Blass wrote:

>On June 09, 2002 at 00:28:44, Peter Kappler wrote:
>
>>On June 08, 2002 at 23:47:41, Will Singleton wrote:
>>
>>>[D]4Q3/1q3ppk/2Nb4/1p4pb/2n5/2P4P/1P3PP1/R5K1 b - -
>>>
>>>Amateur 2 plays Qc7 at 70 sec.  The first amateur program who can beat this
>>>time, or find a better move, gets a copy of Hsu's new book, when available.
>>>Must be submitted by the author.
>>>
>>
>>Grok switches from Nxb2 to Bc5 after 50 seconds, and starts returning a
>>drawscore at ply 10.  Don't know if Bc5 is better than Qc7...
>>
>>  5     13    1.562s     152296   98knps  Nxb2 g4 Bg6 Ra8 Kh6 Qh8+ Bh7
>>  5     13    1.572s     153126   97knps  Nxb2 g4 Bg6 Ra8 Kh6 Qh8+ Bh7
>>  6     13    1.743s     190077  109knps  Nxb2 g4 Bg6 Ra8 Kh6 Qh8+ <h1>
>>  6     13    2.814s     419714  149knps  Nxb2 g4 Bg6 Ra8 Kh6 Qh8+ <h1>
>>  7      5    5.017s     956621  191knps  Nxb2 Ra8 g4 Ra7 Qb6 hxg4 Nd3
>>  7      5    7.932s    1629265  205knps  Nxb2 Ra8 g4 Ra7 Qb6 hxg4 Nd3
>>  8     11   10.585s    2267711  214knps  Nxb2 Ra8 g4 Ra7 Qb6 hxg4 Bg6 Qd7
>>  8     11   14.411s    3262810  226knps  Nxb2 Ra8 g4 Ra7 Qb6 hxg4 Bg6 Qd7
>>  9     -1   50.322s   13361462  266knps  Bc5 Ra8 Qc7 Qh8+ Kg6 Rg8 f5 b4 Bd6 Rc8
>>  9     -1   80.095s   20862554  260knps  Bc5 Ra8 Qc7 Qh8+ Kg6 Rg8 f5 b4 Bd6 Rc8
>> 10      0  119.101s   32176831  270knps  Bc5 Ra8 Qc7 Qh8+ Kg6 Rg8 Bxf2+ Kxf2
>>Qf4+ Kg1 Qc1+ Kh2 Qf4+ <h2>
>>
>>Hardware: AMD 1.4 GHz
>>
>>-Peter
>
>
>I only know that Grok did not find it for a tactical reason.
>

All I know is that Grok failed low while searching Nxb2 at depth 9.  I don't
know how you can be so certain that it didn't see a tactical problem with the
move.

-Peter


>The latest movei needs some minutes on p800 to see that
>Nb2 is bad(losing 2.2 pawns).
>
>It believed that Nb2 gives black a small advantage
>at smaller depth.
>
>It failed high at Bc5 at that depth and did
>not solve the fail high at the moment of posting.
>
>Uri

• Re: position Uri Blass 00:20:45 06/10/02
  • Re: position Peter McKenzie 02:43:57 06/10/02
    • Re: position Uri Blass 03:42:47 06/10/02
      • Re: position Andrew Williams 08:28:51 06/10/02
  • Re: position Peter Kappler 01:56:56 06/10/02
    • Re: position Uri Blass 03:44:57 06/10/02

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