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Subject: Re: Cutting down my qsearch

Author: Robert Hyatt

Date: 06:34:20 04/23/01

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On April 23, 2001 at 05:52:00, JW de Kort wrote:

>Dear friends,
>
>I have added a qsearch to my program and as a result the number of nodes in my
>search has exploded. Sometimes the program searches ten times as much nodes in
>the qsearch than in the regular search. Can anybody give me some advice on
>methodes i can use to limit the number of nodes in the qsearch?
>
>Thanks in advance.
>
>Jan Willem


A simple idea works well:

When you enter a q-search node, if the current score is (say) a queen below
alpha, then capturing a pawn or piece is not going to bring the score back up
to alpha.  Those captures are useless to examine..

• Re: Cutting down my qsearch Vincent Diepeveen 09:10:16 04/24/01
• Re: Cutting down my qsearch Ulrich Tuerke 06:45:45 04/23/01
  • Re: Cutting down my qsearch Robert Hyatt 08:02:07 04/23/01
    • thx for the interesting comment (nt) Ulrich Tuerke 08:03:32 04/23/01
      • Re: thx for the interesting comment (nt) Bas Hamstra 08:33:52 04/23/01
        • Re: thx for the interesting comment (nt) Robert Hyatt 20:19:39 04/23/01
          • Re: thx for the interesting comment (nt) Bas Hamstra 12:19:42 04/24/01
            • Re: thx for the interesting comment (nt) Robert Hyatt 17:44:45 04/24/01
              • Re: thx for the interesting comment (nt) Bas Hamstra 11:21:12 04/25/01
                • Re: thx for the interesting comment (nt) Robert Hyatt 18:57:07 04/25/01
  • Re: Cutting down my qsearch Uri Blass 07:43:02 04/23/01
    • Re: Cutting down my qsearch Dieter Buerssner 11:48:26 04/23/01
    • Re: Cutting down my qsearch Antonio Dieguez 09:06:11 04/23/01
    • Re: Cutting down my qsearch Robert Hyatt 08:04:32 04/23/01
    • Re: Cutting down my qsearch Ulrich Tuerke 07:53:50 04/23/01
      • Re: Cutting down my qsearch Uri Blass 08:45:56 04/23/01
        • Re: Cutting down my qsearch Ulrich Tuerke 09:17:24 04/23/01
  • Re: Cutting down my qsearch Dann Corbit 06:48:40 04/23/01
    • Re: Cutting down my qsearch Ulrich Tuerke 07:11:00 04/23/01
      • Re: Cutting down my qsearch Dieter Buerssner 07:58:27 04/23/01
        • Re: Cutting down my qsearch Ulrich Tuerke 08:13:15 04/23/01
          • Re: Cutting down my qsearch Andrew Williams 10:37:19 04/23/01
            • Re: Cutting down my qsearch Tony Werten 01:08:12 04/24/01
              • Re: Cutting down my qsearch Andrew Williams 03:58:44 04/24/01

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