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Subject: Deep Junior at a loss in this position?!!

Author: Djordje Vidanovic

Date: 12:17:10 03/04/00

On March 04, 2000 at 13:52:43, Ed Schröder wrote:

>Not having tried this position on my own baby consider this: why add
>extra chess knowledge if these kind of things can so easily seen by
>search. No need to do things twice as the extra knowledge is only
>lowering the NPS of a program. I am not saying this is true for this
>position only that programmers often let do search the work instead
>of adding extra chess knowledge that is not needed anymore now that
>PC's are are so fast and becoming faster and faster and faster.....
>
>As you see in some cases you can even make your program stronger by
>removing chess knowledge. These cases are exceptional but they do
>exist.
>
>Ed


I have just got an email inquiring about the performance of Deep Junior on this
position.  The sender was quite incredulous so I am attaching DJ's analysis
(reaching up to 900,000 nodes per second).  Close to three minutes of analysis
yielded zilch -- so, Ed, fast searchers do not necessarily manage to find key
moves merely through searching deep.

New position
[D]k7/1b6/8/8/2Q5/8/6p1/6K1 w - - 0 1

Analysis by Deep Junior 6.0:

1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qa3+ Kb8 6.Qg3+ Ka8
  +-  (5.28)   depth: 6   00:00:00  11kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qg7 Kb6
  +-  (5.28)   depth: 9   00:00:00  112kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qc5+ Kb8 6.Qc3 Ka8 7.Qa3+ Kb8
  +-  (5.28)   depth: 12   00:00:00  508kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qc5+ Kb8 6.Qc3 Ka8 7.Qa3+ Kb8
  +-  (5.28)   depth: 15   00:00:03  2864kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qc5+ Kb8 6.Qc3 Ka8 7.Qa3+ Kb8
  +-  (5.28)   depth: 18   00:00:14  11090kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qc5+ Kb8 6.Qc3 Ka8 7.Qa3+ Kb8
  +-  (5.28)   depth: 20   00:00:28  22710kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7 5.Qc5+ Kb8 6.Qc3 Ka8 7.Qa5+ Kb8
  +-  (5.28)   depth: 22   00:01:06  52426kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7
  +-  (5.28)   depth: 23   00:01:56  91519kN
1.Qa4+ Kb8 2.Qf4+ Ka7 3.Qf2+ Ka8 4.Qf8+ Ka7
  +-  (5.28)   depth: 24   00:02:52  134614kN

(Vidanovic, Naissus 04.03.2000)

Re: Deep Junior at a loss in this position?!! Robert Hyatt 17:23:24 03/04/00
- Re: Deep Junior at a loss in this position?!! Djordje Vidanovic 17:40:51 03/04/00
  - Re: Deep Junior at a loss in this position?!! Ernst Walet 05:45:32 03/05/00
    - Re: Deep Junior at a loss in this position?!! Djordje Vidanovic 11:38:26 03/05/00
      - Re: Deep Junior at a loss in this position?!! Ernst Walet 12:21:48 03/05/00
        
        Re: Deep Junior at a loss in this position?!! Djordje Vidanovic 15:25:04 03/05/00
        
        "Screamer" finds the winning plan in 4 seconds on a 180 MHz machine Richard A. Fowell (fowell@netcom.com) 20:16:54 03/05/00
        
        Re: "Screamer" finds the winning plan in 4 seconds on a 180 MHz machine Bruce Moreland 22:37:23 03/05/00
        
        Re: "Screamer" finds the winning plan in 4 seconds (but can't see end) Richard A. Fowell (fowell@netcom.com) 07:58:59 03/06/00
        
        Re: Deep Junior at a loss in this position?!! blass uri 12:28:45 03/05/00
        
        Re: Deep Junior at a loss in this position?!! Ernst Walet 12:42:42 03/05/00
        
        Re: Deep Junior at a loss in this position?!! Ernst Walet 12:23:38 03/05/00
    - Re: Deep Junior at a loss in this position?!! Ernst Walet 09:16:20 03/05/00
  - Re: Deep Junior at a loss in this position?!! Amir Ban 02:27:13 03/05/00
    - Re: Deep Junior at a loss in this position?!! Timothy J. Frohlick 09:02:21 03/05/00
      - Re: Deep Junior at a loss in this position?!! Amir Ban 14:03:19 03/05/00
  - Re: Deep Junior at a loss in this position?!! blass uri 21:29:00 03/04/00
  - Re: Deep Junior at a loss in this position?!! Robert Hyatt 20:11:24 03/04/00

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