Rybka wins the World Computer Chess Championship with big margin

Junior, Deep Sjeng, and Shredder share second

computer chess championship

In an exciting last round of the World Computer Chess Championship in Pamplona, Rybka defeated Junior with white to claim another consecutive World Champion title. The strongest computer program at the moment finished with 8,0/9, without losing a single game and having only two draws (against Shredder and Hiarcs)

Junior was supposed to get at least clear second place having in mind computer ELO ratings. Draws with Deep Sjeng and Shredder were logical, but the draw with Equinox (the Italian program at the event) stirred the table. Junior finished with the same points as Shredder and Deep Sjeng and only the tiebreak (Sum of Defeated Opponent Scores) gave Junior the silver.

Hiarcs, running on the same Intel Xeon W5580 @ 3.2GHz x 8 as Junior, finished 5th with 6,0/9. It did well against lower rated opponents, but achieved only 2 draws against the higher placed computers.

Jonny finished a stable 4,5/9 managing to score 4 victories and a valuable draw with Shredder.

The lower part of the table is completed by The Baron, Equinox, Pandix 2009, and Joker.

Stay tuned for more information!


1 Rybka 8,0/9

2 Junior 6,5/9

3 Shredder 6,5/9

4 Deep Sjeng 6,5/9

5 Hiarcs 6,0/9

6 Jonny 4,5/9

7 The Baron 3,0/9

8 Equinox 2,0/9

9 Pandix 2009 1,0/9

10 Joker 0,5/9

Official site

World Computer Chess Championship

WCCC and the Computer Olympiad to take place in Pamplona

computer chess championship

The XVII World Computer Chess Championship will take place 11-18 May, 2009, in Pamplona, Spain. The championship will be part of the International Week of Computation which will be held in Palacio del Condestable. Other events include the Advances in Computer Games conference, the XIV Computer Olympiad (with the modalities of Chinese Chess, Go, Checkers, Hex, etc.), and many additional seminars.

The official opening is on Monday 11.30 hours, in the playing hall.


There will be 10 participants in the XVII World Computer Chess Championship. The favorites are Rybka (USA), Junior (Israel), and Hiarcs (Great Britain). Last seeded are The Baron (NED) and Deep Sjreng (Belgium). Here is the full list.

1. Rybka

2. Hiarcs

3. Junior

4. Pandix 2009

5. Shredder

6. Equinox

7. Jonny

8. Joker

9. The Baron

10. Deep Sjreng

The last two events were dominated by the current world chess champion Rybka. In both events there were not many participants (10 in Beijing 2008 and 12 in Amsterdam 2007). The event with most participants so far was the 1999 Paderborn championship with 30 participants. If you ever wondered how many programs are there, here is a comprehensive list of computer chess programs.

All winners by year

1. 1974, Stockholm, Kaissa

2. 1977, Toronto, Chess 4.6

3. 1980, Linz, Belle

4. 1983, New York, Cray Blitz

5. 1986, Cologne, Cray Blitz

6. 1989, Edmonton, Canada, Deep Thought

7. 1992, Madrid, Spain, ChessMachine (Gideon)

8. 1995, Hong Kong, Fritz

9. 1999, Paderborn, Germany, Shredder

10. 2002, Maastricht, Netherlands, Deep Junior

11. 2003, Graz, Austria, Shredder

12. 2004, Bar-Ilan University, Ramat Gan, Israel, Deep Junior

13. 2005, Reykjavík, Iceland, Zappa

14. 2006, Torino, Italy, Junior

15. 2007, Amsterdam, The Netherlands, Rybka

16. 2008, Beijing, China Rybka

More about the XVII World Computer Chess Championship

Official website

Live games

Interview with Rybka (fun)

Newly opened computer chess forum