GNU Chess 5.50

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Michel
Posts: 1960
Joined: Sun Sep 28, 2008 11:50 pm

GNU Chess 5.50

Post by Michel » Tue Apr 16, 2013 2:27 pm

Sorry for the spam. This release was originally announced as 5.07.175b in the programmers forum but it was suggested that I bump the version number
and repost it here.

http://hardy.uhasselt.be/Toga/gnuchess-release/

According to my testing GNU Chess 5.50 is about 120 elo (+-20) stronger than Fruit 2.1 at 40/4 time control, 128Mb hash.

I think it is a good milestone since it is the first GNU Chess 5 which is substantially stronger than GNU Chess 6.

Modern Times
Posts: 2141
Joined: Thu Jun 07, 2012 9:02 pm

Re: GNU Chess 5.50

Post by Modern Times » Tue Apr 16, 2013 4:47 pm

How much stronger is it than GNU Chess 5.07.173b ?

Michel
Posts: 1960
Joined: Sun Sep 28, 2008 11:50 pm

Re: GNU Chess 5.50

Post by Michel » Tue Apr 16, 2013 5:02 pm

How much stronger is it than GNU Chess 5.07.173b ?
I did not really measure this.
But 5.07.173b is 2603 at the CCRL (40/4) and Fruit 2.1 is 2687. So if my measurement of the difference between Fruit 2.1 and 5.50 is correct then the difference between 5.07.173b and 5.50 should be about 200 elo.

This is just an estimate as there are huge error bars everywhere. In particular
this estimate would contradict somewhat the fact that 5.50 is weaker than Glaurung 2.2.

Modern Times
Posts: 2141
Joined: Thu Jun 07, 2012 9:02 pm

Re: GNU Chess 5.50

Post by Modern Times » Tue Apr 16, 2013 6:39 pm

OK thanks, well I will run it at chess960 and find out, assuming it still plays that.

Michel
Posts: 1960
Joined: Sun Sep 28, 2008 11:50 pm

Re: GNU Chess 5.50

Post by Michel » Wed Apr 17, 2013 10:38 am

Thanks!

Michel.

Modern Times
Posts: 2141
Joined: Thu Jun 07, 2012 9:02 pm

Re: GNU Chess 5.50

Post by Modern Times » Fri Apr 19, 2013 9:52 pm

Michel wrote:
How much stronger is it than GNU Chess 5.07.173b ?
I did not really measure this.
But 5.07.173b is 2603 at the CCRL (40/4) and Fruit 2.1 is 2687. So if my measurement of the difference between Fruit 2.1 and 5.50 is correct then the difference between 5.07.173b and 5.50 should be about 200 elo.
After the first 600 chess960 games, that is about right. Many more games to go though.

http://computerchess.org.uk/ccrl/404FRC/

Michel
Posts: 1960
Joined: Sun Sep 28, 2008 11:50 pm

Re: GNU Chess 5.50

Post by Michel » Sat Apr 20, 2013 1:14 pm

Thanks a lot!

Michel

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