Not logged inRybka Chess Community Forum
Up Topic Rybka Support & Discussion / Rybka Discussion / Rybka @ 3rd ACCA World Computer Rapid Chess Championship
- - By Vasik Rajlich (Silver) Date 2009-08-16 19:47 Edited 2009-08-16 20:26
The 3rd ACCA World Computer Rapid Chess Championship was held on ICC this past weekend and Rybka won ahead of Deep Sjeng, Stockfish and Hiarcs.

A huge thanks to the guys on our team who worked hard to make our participation a success.

Lukas Cimiotti again ran Rybka on his cluster, which now consists of 9 Nehalem machines. There are five e55*0 octs, plus four overclocked core-i7 quads, for a total of 56 cores. The clustering algorithm is essentially the same as the one we used in Pamplona in May, but as a result of some restructuring and cleanup there was again a last-minute rush to get ready. This is never a pretty process, but we did use the latest Rybka version throughout the tournament and we now again have a fully working cluster version. A huge thanks to Lukas for his work.

Our opening book was handled by Jiří Dufek, the newest addition to our team. Jiří comes from the world of correspondence chess (ICCF IM, rated 2568) and freestyle play (winner of 4th CSS/PAL Freestyle tournament in '06, together with teammate Roman Chytilek), and is also a FIDE master. This is of course an excellent background for a computer chess book author, but still Jiří had to do quite some work to make the transition, as in computer chess all book decisions must be made before the event.

Our book's performance was excellent: in every white game we had either a clear book advantage or an instantly crushing attack (like Jeroen, Jiří favored 6. h3 vs the Najdorf, which is objectively only equal, but with clear-cut attacking prospects which always materialized immediately), while in every black game we had full equality or better.

Jiri's opening report can be found here:

The tournament itself was quite exciting and went down to the wire, as Deep Sjeng was able to match Rybka's score until the very last round. Rybka played a few nice games and also a few sloppy ones - there is as always lots of work to do. A big thanks to Charles Roberson for his organization.

Tournament website (with games):
Tournament forum thread:

Parent - - By Uly (Gold) Date 2009-08-16 19:58

I'm mostly interested about the elo performance of the Cluster in the event, taking into account the draws against Pandix and TwistedLogic, it's not clear that it performed better than an octal alone could.
Parent - By Vasik Rajlich (Silver) Date 2009-08-16 20:30
It's hard to say. Performance is a statistical thing and we haven't run any cluster tests against opponents like Pandix and TwistedLogic. In those two individual games, these engines did what they needed to do to draw, obviously.

Parent - By NATIONAL12 (Gold) Date 2009-08-16 22:30
very good result but being greedy i expected more.maybe we could run through the drawn games we did not expect.
Parent - - By Acro (**) Date 2009-08-17 12:35

> Tournament website (with games):

It seems there are no games on the site.
Parent - By maceisthemax (*) Date 2009-08-25 23:51
actually, the games are up, now, sort need to click through "results", but funny thing is....the games are there, moves, and players, etc.  But no "results"  no clue who won, just the raw moves. I have been getting this a lot lately, especially on World Chess Live.  Any ideas why?
Parent - - By Lukas Cimiotti (Bronze) Date 2009-08-17 14:16 Edited 2009-08-17 14:22
Special thanks to Nick Carlin, who kindly sent me his ICC setup and taught me how to play on ICC :)
He also played some test games against the cluster.
Parent - - By turbojuice1122 (Gold) Date 2009-08-17 17:13
Very good, I'm glad to know that he's back in the loop on things. :-)
Parent - By Lukas Cimiotti (Bronze) Date 2009-08-17 17:30
Sadly he isn't back :(
But he helps me whenever I ask him to :)
He wants to have enough time for his daughter. As soon as she's grown up, he'll be back.
- By Ray (****) Date 2009-08-16 20:04
Another excellent result from Rybka ! Great performance by Sjeng too obviously, but I think Tord and the rest of the Stockfish team did incredibly well and deserve special mention, beating Hiarcs into 3rd place
- - By maceisthemax (*) Date 2009-08-23 21:32
I tried to see the games at
but got this mess

Not Found
The requested URL /ACCAWCRCC/2009ACCAWCRCC/ was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Think maybe it will be available later?
Parent - By keoki010 (Silver) Date 2009-08-24 15:43
Up Topic Rybka Support & Discussion / Rybka Discussion / Rybka @ 3rd ACCA World Computer Rapid Chess Championship

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill