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Subject: Re: crafty detect draw

Author: Robert Hyatt

Date: 21:06:35 12/21/03

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On December 21, 2003 at 23:04:12, Mike Byrne wrote:

>On December 21, 2003 at 22:53:25, Sean Mintz wrote:
>
>>I am curious how many people run Crafty with /DDETECTDRAW set; and more
>>specifically, if anyone has run any matches to see how it affects crafty's
>>strength.
>>
>>Sean Mintz
>
>The versions I have made recently had it set.


Someone sent me a position where it screwed up pretty badly.  I have not had
time to look at it carefully however.  If you are interested (I don't think
he will mind me posting this email here):


The second problem :
I noticed a position where the DETECTDRAW code seems to fail badly.
In the following sample, Crafty (compiled with DETECTDRAW) detects draw =
when there is not any draw at all.
In this position Crafty sacrify a piece (playing Nd3) to detect =
erroneously a draw and lose the game badly.
You will see the logs files below for the two cases.
=20

CRAFTY WITH DETECTDRAW plays Nd3 :

White(1): setboard 3r1rk1/p1p4p/1p2b1pP/2n1PpP1/q1P2B2/4QP2/P6R/2R2BK1 b =
- - 0 25








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