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Subject: Re: a "simple" knight ending

Author: Bernhard Bauer

Date: 05:53:15 08/31/05

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On August 31, 2005 at 05:53:26, Vincent Lejeune wrote:

>[d]4K1nk/7p/8/7P/4N3/8/8/8 w - - 0 1
>
>A subtle knight placement, who allow white king a triangulation !
>Hard for null-mover because zugzwang, unless you have the KNPKNP EGTB ;o)

Hard for crafty, even if you set selective to 0,0.
However, Zappa gives a mate in 30 within 10 seconds.
Spike 10 announces mate in 28 within 90 sec, but the mate goes up to 43 in 1:54.
Toga2 gives a score of 5.3 in 12 sec. The score goes up!
SOS 5.1 gives a mate in 18 in 23 sec.

Huh! Why are some programs so good at this position and others take so long?
It cannot only be a null move issue.
Kind regards
Bernhard



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