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Subject: Re: Hiarcs7.32 determines a Draw 39 moves before Crafty16.13 sees the Draw!!

Author: blass uri

Date: 05:49:23 09/01/99

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On September 01, 1999 at 07:56:29, Robert Hyatt wrote:
>What is happening here is that Hiarcs is using some unsafe evaluation (IMHO)
>to say that two minors vs one minor is a draw.  Rebel lost a game making this
>assumption in the WCCC as Uri pointed out.

Rebel evaluated KBB vs KN as 0.xx pawns advantage for the BB and not as a draw.

>I don't call KBN vs KB a draw.  Most are.  But _all_ are _not_.  It makes you
>look like a genius when it is right.  And like an idiot when it is wrong.  I
>prefer the database approach which is 100% right.

The problem even with tablebases is with KBN vs KBP
In this case you can go by search for KBN vs KB by sacrificing the pawn but if
you cannot go by search to KBN VS KB your evaluation will be clearly wrong.

I do not say that the static evaluation should evaluate these positions as draws
but it should evaluate positions of KBN vs KBP as close to a draw and crafty has
not 0.xx evaluations for them.

Uri



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