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Subject: Re: Junior 4.6 and the null move technique

Author: Ernst A. Heinz

Date: 01:25:22 03/19/98

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On March 18, 1998 at 15:12:07, Christophe Theron wrote:

>You are right. My point was to show that null move or related techniques
>had a significant impact on this position.
>
>Unfortunately, others parameters biased the result. So here is another
>position given by Chrilly Donninger in his famous paper from ICCA
>Journal, Sep 93:
>
>White:
>Pawn b4
>Rook d4
>King f2
>
>Black:
>Pawn a6 b5 h2
>Rook g6
>King h1
>
>White to move. The key is 1.Rd1+, which is mate in 7. After 1...Rg1,
>black is in zugzwang. White plays for example 2.Rf1, and wins.

"DarkThought" is an aggressive null move searcher and finds 1. Rd1+!
in iteration #2 after just 464 nodes.

It returns the mate score in iteration #8 after 4380 nodes.

=Ernst=

• Re: Junior 4.6 and the null move technique Christophe Theron 08:11:25 03/19/98
  • Re: Junior 4.6 and the null move technique Ernst A. Heinz 08:45:39 03/19/98
    • Re: Junior 4.6 and the null move technique Christophe Theron 13:06:11 03/19/98
      • Re: Junior 4.6 and the null move technique Ernst A. Heinz 13:52:02 03/19/98
        • Re: Junior 4.6 and the null move technique Robert Hyatt 20:51:44 03/19/98
          • A call for all crafties.. Jan-Frode Myklebust 14:54:29 03/20/98
          • Re: Junior 4.6 and the null move technique Ernst A. Heinz 01:52:21 03/20/98
      • Re: Junior 4.6 and the null move technique Robert Hyatt 13:25:21 03/19/98

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