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Subject: Re: Another anti null-mover engine position (and endgame study)

Author: James T. Walker

Date: 20:38:10 02/07/04

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On February 06, 2004 at 13:48:48, Jaime Benito de Valle Ruiz wrote:

>This endgame study can be game following the sequence
>
>1.Bd1 g1Q 2.Bxa4 Qc1 3.Bxd7 h5 4.Be8 h4 5.Ba4 Line
>
>[d] 8/3p4/p6p/k2N3B/p7/K6p/PP4pP/8 w - - 0 1
>
>Many engines (Fritz 8, Hiarcs 8, Ruffian 1.01) cannot win this endgame, probably
>due to the well known null-move problem for extreme and rare positions such as
>this.
>
>They just don't find 5. Ba4
>
>Try your engine after 4...,h4
>
>[d]8/3p4/p6p/k2N3B/p7/K6p/PP4pP/8 w - - 0 1
>
>All the above mentioned engines play 5.Bd7 and get a draw instead of winning.
>
>Regards,
>
>  Jaime

Hello Jaime,
I don't understand what I'm missing here.  Both Hiarcs 8 and Fritz 8 will win
this endgame on my computer.  I admit that Ruffian 1.0.5 and Deep Sjeng 1.6 will
draw here though.
Jim



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