Discussion of computer chess matches and engine tournaments.
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jdart
- Posts: 4115
- Joined: Fri Mar 10, 2006 4:23 am
- Location: http://www.arasanchess.org
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by jdart » Sat Mar 30, 2019 10:31 pm
Werner wrote: ↑Sat Mar 30, 2019 5:05 pm
How can I create a log file with this wb engine using winboard ?
-debugMode true should show all the commands winboard sends and receives.
--Jon
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tpoppins
- Posts: 919
- Joined: Tue Nov 24, 2015 8:11 pm
- Location: upstate
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by tpoppins » Tue Apr 02, 2019 5:44 pm
Werner wrote: ↑Sat Mar 30, 2019 9:05 am
in a short testmatch with 100 games I have had around 50 games lost due to an illegale move:
Odd. I counted over 700 games I played with v2.0.34, including 400+ 4CPU ones, and only found one game that had to be replayed. It was from the 4CPU test, but I cannot determine now what was the error or if the error was on Schooner's part.
It's installed as an xboard engine under Cute Chess, using 512 MB hash as well.
I recall seeing precisely
this error with another engine. The situation was different but I suspect that underlying cause is the same -- undefined behavior possibly caused by a bug in the hashtable code.
Tirsa Poppins
CCRL
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D Sceviour
- Posts: 570
- Joined: Mon Jul 20, 2015 3:06 pm
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Post
by D Sceviour » Tue Apr 02, 2019 7:38 pm
tpoppins wrote: ↑Tue Apr 02, 2019 5:44 pm
The situation was different but I suspect that underlying cause is the same -- undefined behavior possibly caused by a bug in the hashtable code.
Another possibility may be incompatible mmx or sse hardware. Try using Schooner's non-popcount generic version.
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Werner
- Posts: 2610
- Joined: Wed Mar 08, 2006 9:09 pm
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by Werner » Wed Apr 03, 2019 9:52 am
Thank you for the answers. Under Arena I played 1000 games now without any problems.
I tried out Winboard again with log on - and could not repeat this behaviour. I used the same pc.
Werner