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Article #3297

Re: UNTRUE -- gnuchess 4.075 defeats Crafty 14.4

#3297
From: Tim Mann
Date: Sat, 24 Jan 1998 00:00
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In article <6abukk$ro8@dworkin.interact.net.au>,
Tim Benham <timben@interact.net.au> wrote:
>One thing that did make a difference is the broken results keeping by
>xboard 3.6.2.

The bug you hit here has been known about almost since 3.6.2's
release, but I haven't had time to release a new xboard and WinBoard.
There is an easy workaround for it within Crafty, which I believe will
be in Crafty 14.5.  That could have been done long ago, but there was
a failure in communication from me to Bob.

>However, I made a disturbing discovery which may invalidate even this
>result: gnuchessx may lose on time and crafty does not claim! is this
>a known problem in crafty or xboard?

I don't think any of us consider it to be Crafty's (or GNU Chess's)
job to keep time and call its opponent's flag, so it's not a problem
in Crafty.

xboard does not call flags and end the game in local human
vs. computer or computer vs. computer play.  That seemed pointless to
me, especially because GNU Chess has a poor time management algorithm
that causes it to usually run out of time at move 38 or 39 of a
40-move time control period.  xboard notes that the flag is down but
lets the game continue.  You could probably easily modify it to call
the flag and end the game if desired.

	--Tim Mann
	  xboard/WinBoard primary author
-- 
Tim Mann <mann@pa.dec.com>
http://www.research.digital.com/SRC/personal/Tim_Mann/
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From: mann@src.dec.com (Tim Mann)
Subject: Re: UNTRUE -- gnuchess 4.075 defeats Crafty 14.4
Date: 1998/01/24
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Organization: Systems Research Center, Digital Equipment Corporation
Newsgroups: gnu.chess,rec.games.chess.computer