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Subject: Re: What's the Secret to Shredder 7.04 Success?

Author: Uri Blass

Date: 08:20:56 05/04/03

On May 04, 2003 at 10:44:15, Jim Bond wrote:

<snipped>
>>possible reasons for shredder's success in the endgame or gettting better
>>endgames may be better search rules and better evaluation of endgames.
>>
>>Uri
>
>You are making sense.  I only said in the beginning that Shredder's success in
>the ending game COULD be PARTLY due to its ability to probe TB more often than
>other engines.

No

It is very easy to teach programs to probe tablebases at every node but
programmers found that it is counter productive because being significantly
slower in nodes per seconds is not worth the extra knolwedge.

I do not think that programmers of Fritz,Tiger are stupid and I assume that they
tested and found that probing TB more often is not productive for them.

Note also that I see no tablebases probes in analysis of shredder7.04 even when
it is clear from the analysis that shredder is using them so I have no way to
test your theory that shredder7.04 is using more tablebases than Fritz.

Shredder7 reports about tablebases but the best shredder(7.04) does not report
about tablebases.

New game
[D]7k/7p/8/P5p1/7P/8/8/6K1 w - - 0 1

Analysis by Shredder 7.04:

1.hxg5
  +-  (#14)   Depth: 1/1   00:00:00
1.hxg5
  +-  (#14)   Depth: 1/1   00:00:00
1.hxg5
  +-  (#14)   Depth: 2/2   00:00:00
1.hxg5
  +-  (#14)   Depth: 3/3   00:00:00
1.hxg5
  +-  (#14)   Depth: 4/4   00:00:00
1.hxg5
  +-  (#14)   Depth: 5/5   00:00:00
1.hxg5
  +-  (#14)   Depth: 6/6   00:00:00
1.hxg5
  +-  (#14)   Depth: 7/7   00:00:00
1.hxg5
  +-  (#14)   Depth: 8/8   00:00:00
1.hxg5
  +-  (#14)   Depth: 9/9   00:00:00  1kN
1.hxg5
  +-  (#14)   Depth: 10/10   00:00:00  3kN
1.hxg5
  +-  (#14)   Depth: 11/11   00:00:00  7kN
1.hxg5
  +-  (#14)   Depth: 12/12   00:00:00  19kN
1.hxg5
  +-  (#14)   Depth: 13/13   00:00:01  74kN
1.hxg5
  +-  (#14)   Depth: 14/14   00:00:01  155kN
1.hxg5
  +-  (#14)   Depth: 15/15   00:00:02  288kN
1.hxg5
  +-  (#14)   Depth: 16/16   00:00:03  488kN
1.hxg5
  +-  (#14)   Depth: 17/17   00:00:05  791kN
1.hxg5
  +-  (#14)   Depth: 18/18   00:00:07  1255kN
1.hxg5
  +-  (#14)   Depth: 19/19   00:00:13  2253kN

(Blass, Tel-Aviv 04.05.2003)

Uri

Re: What's the Secret to Shredder 7.04 Success? Jim Bond 09:11:11 05/04/03
- Re: What's the Secret to Shredder 7.04 Success? Uri Blass 10:27:35 05/04/03
  - Re: What's the Secret to Shredder 7.04 Success? Jim Bond 11:19:14 05/04/03
    - Re: What's the Secret to Shredder 7.04 Success? Uri Blass 12:23:19 05/04/03
      - Re: What's the Secret to Shredder 7.04 Success? Jim Bond 14:15:04 05/04/03
        
        Re: What's the Secret to Shredder 7.04 Success? Tom Kerrigan 17:12:34 05/04/03
        
        Re: What's the Secret to Shredder 7.04 Success? Dieter Buerssner 14:41:30 05/04/03
        
        Re: What's the Secret to Shredder 7.04 Success? Sune Fischer 15:49:44 05/04/03
        
        Re: What's the Secret to Shredder 7.04 Success? Dieter Buerssner 12:32:43 05/05/03
        
        Re: What's the Secret to Shredder 7.04 Success? Sune Fischer 13:00:35 05/05/03
        
        Re: What's the Secret to Shredder 7.04 Success? Uri Blass 16:10:07 05/04/03
        
        Re: What's the Secret to Shredder 7.04 Success? Sune Fischer 16:22:15 05/04/03
- Re: What's the Secret to Shredder 7.04 Success? Jim Bond 09:36:04 05/04/03

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