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Main
Date: 29 Oct 2008 14:26:00
From: dae3
Subject: GNUchess vs. Phalanx 0-1 !!!
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The Phalanx XXII engine, while playing as black, has defeated GNUchess
5.07 in an engine-vs-engine match without time limits on my system.
This came as a surprise to me, as I had read from several sources that
Phalanx was a much weaker engine than the GNU effort.
Here's a picture of the checkmate:
<http://img390.imageshack.us/my.php?image=gnuchessvsphalanxkn0.png >
XBoard and the engines were invoked with: "xboard -xponder -xclock -fcp
gnuchess -scp 'phalanx -e 0' -mode TwoMachines &". I'm attaching the
game's PGN file.
-----BEGIN PGN FILE-----
[Event "Computer chess game"]
[Site "acerrimo.local"]
[Date "2008.10.29"]
[Round "-"]
[White "gnuchess"]
[Black "phalanx"]
[Result "0-1"]
[TimeControl "-"]
1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e4 e5 7. Qd3
Rb8 8. Be2 d5 9. exd5 cxd5 10. O-O Be6 11. Qg3 Bd6 12. Qxg7 Rg8 13. Qh6 Rg6
14. Qh4 Rb4 15. f4 exf4 16. Qe1 Qb6+ 17. Kh1 Ne4 18. Bxf4 Bxf4 19. Rxf4
Ng3+ 20. hxg3 Rxf4 21. Bh5 Rh6 22. Qe2 Rf2 23. Qb5+ Qxb5 24. Nxb5 Rxh5+ 25.
Kg1 Rxc2 26. Rb1 Rd2 27. a4 d4 28. Rf1 Bd5 29. Nc7+ Kf8 30. Nxd5 Rxd5 31.
b3 Re2 32. Rd1 d3 33. g4 d2 34. Kh2 Re1 35. Rxd2 Rxd2 36. Kg3 Re3+ 37. Kf4
Rxb3 38. a5 Rxg2 39. a6 Re2 40. g5 Kg7 41. Kg4 Kg6 42. Kf4 Ra3 43. Kg4 Re4#
{Black mates} 0-1
------END PGN FILE------
--
~ > cat /etc/redhat-release && uname -a
Scientific Linux SL release 5.1 (Boron)
Linux acerrimo.local 2.6.18-92.1.10.el5 #1 SMP Mon Aug 4 14:38:32 EDT
2008 i686 athlon i386 GNU/Linux
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Date: 29 Oct 2008 16:11:20
From: Tony M
Subject: Re: GNUchess vs. Phalanx 0-1 !!!
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On Wed, 29 Oct 2008 14:26:00 +0100, dae3 <[email protected] >
wrote:
>The Phalanx XXII engine, while playing as black, has defeated GNUchess
>5.07 in an engine-vs-engine match without time limits on my system.
>
>This came as a surprise to me, as I had read from several sources that
>Phalanx was a much weaker engine than the GNU effort.
>
In my own testing and in the rating lists that I've seen, Phalanx was
always approximately 200 rating points stronger than GnuChess. I saw
a few pages like this one
http://flamendialis.wordpress.com/2008/02/26/phalanx/
that said Phalanx was weaker than GnuChess, but they are talking about
a version that is deliberately weakened. GnuChess only has one
playing level, whereas Phalanx can have its playing strength adjusted.
You used the -e0 command line option with Phalanx, which makes it play
full strength.
Tony
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Date: 31 Oct 2008 00:34:27
From: SAT W-7
Subject: Re: GNUchess vs. Phalanx 0-1 !!!
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Did you play a game like that with your computers ?
What i noticed about Ivan was when it made moves it was thinking pretty
much at top strength even on the first move.. When you set up like that
there is no opening book....
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Date: 29 Oct 2008 09:08:32
From: SAT W-7
Subject: Re: GNUchess vs. Phalanx 0-1 !!!
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Hey that was good , i liked the pic too,,
Can you program where each piece go's on your computers ? If you can
have them play a game of random chess vs each other ...
I have played two games against my Ivan and lost both... I put the
major pieces in a paper bag ( all of them ) and get tongs so i can not
feel the shape of them and pull them out of the hat and place them on
the board and how ever they come up is how they come up except the
bishops of course , i make sure they are on different colors and i have
NO castling .....I do not have another computer to play that game with
so i have played two games vs Ivan myself and they have been exciting
games even though i lost ....
O and ALL pawns go on their normal squares....
Try a game like that and see how they play each other because there is
no opening set of moves .....The last game i lost was set like this.
White
A-I = Rook
E-I = Rook
B-I = Queen
C-I= Bishop
H-I =Bishop
D-I = Knight
G-I= Knight
F-I -= King
Black ...
A-8 = Knight
F-8= Knight
B-8 = Rook
G-8 = Rook
C-8 = Queen
D-8 = Bishop
E-8 = Bishop
H-=8 King..
Set your two computers like that and see who wins ..
I was white and as you can see Blacks King was in a great spot ..+ his
bishops were in a good spot too ...My first move was D-I to C-3 and
Blacks first move was A-I to B-6 Knight move .....
I threw in NO Castling to make the game a little harder , you do not
know where the King will come be at the start of the game..
Want to play a game like that , my Ivan vs one of your computers ? You
can tell me how to set my power pieces up and i'll tell you how to set
yours up ...Mite be a exciting game .....
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