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Hydra (Computer)
Photograph courtesy of  
Number of games in database: 31
Years covered: 2004 to 2005
Overall record: +17 -3 =11 (72.6%)*
   * Overall winning percentage = (wins+draws/2) / total games.

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Most played openings
B84 Sicilian, Scheveningen (2 games)
B42 Sicilian, Kan (2 games)
C42 Petrov Defense (2 games)
D02 Queen's Pawn Game (2 games)
B47 Sicilian, Taimanov (Bastrikov) Variation (2 games)

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Brutus (Computer) is its predecessor.

 page 1 of 2; games 1-25 of 31  PGN Download
Game  ResultMoves YearEvent/LocaleOpening
1. Hydra vs Fritz 1-0472004IPCCCA00 Uncommon Opening
2. Shredder vs Hydra 1-03120044th Intl.CSVNB76 Sicilian, Dragon, Yugoslav Attack
3. Hydra vs Shredder 1-0382004Abu Dhabi Computer ChallengeB80 Sicilian, Scheveningen
4. Shredder vs Hydra 0-151200414th Abu Dhabi Chess FestivalB97 Sicilian, Najdorf
5. Hydra vs Shredder ½-½43200414th Abu Dhabi Chess FestivalB90 Sicilian, Najdorf
6. Shredder vs Hydra ½-½38200414th Abu Dhabi Chess FestivalE59 Nimzo-Indian, 4.e3, Main line
7. Vladimirov vs Hydra 0-1232004Exhibition gameA07 King's Indian Attack
8. Hydra vs Vladimirov 1-0472004Exhibition gameC77 Ruy Lopez
9. Hydra vs Vladimirov 1-0372004Exhibition gameC73 Ruy Lopez, Modern Steinitz Defense
10. Hydra vs Shredder ½-½96200414th Abu Dhabi Chess FestivalB84 Sicilian, Scheveningen
11. Shredder vs Hydra ½-½69200414th Abu Dhabi Chess FestivalB42 Sicilian, Kan
12. Hydra vs Shredder 1-0472004Abu Dhabi Computer ChallengeB92 Sicilian, Najdorf, Opocensky Variation
13. Shredder vs Hydra ½-½722004Abu Dhabi Computer ChallengeB47 Sicilian, Taimanov (Bastrikov) Variation
14. Vladimirov vs Hydra ½-½412004Abu Dhabi ChallengeE12 Queen's Indian
15. A Nickel vs Hydra 1-0432004Corr. Chess MatchB48 Sicilian, Taimanov Variation
16. Hydra vs A Nickel 0-1542004Corr. Chess MatchC07 French, Tarrasch
17. Ponomariov vs Hydra 0-1332004Man vs Machine 120'/40+60'E15 Queen's Indian
18. Topalov vs Hydra ½-½822004Man vs Machine 120'/40+60'D02 Queen's Pawn Game
19. Hydra vs Karjakin 1-0592004Man vs Machine 120'/40+60'C65 Ruy Lopez, Berlin Defense
20. Hydra vs Ponomariov 1-0382004Man vs Machine 120'/40+60'B84 Sicilian, Scheveningen
21. Hydra vs Adams 1-0332005Adams - Hydra MatchC42 Petrov Defense
22. Adams vs Hydra ½-½652005Adams - Hydra MatchB47 Sicilian, Taimanov (Bastrikov) Variation
23. Hydra vs Adams 1-0282005Adams - Hydra MatchC91 Ruy Lopez, Closed
24. Adams vs Hydra 0-1502005Adams - Hydra MatchB23 Sicilian, Closed
25. Hydra vs Adams 1-0412005Adams - Hydra MatchC87 Ruy Lopez
 page 1 of 2; games 1-25 of 31  PGN Download
  REFINE SEARCH:   White wins (1-0) | Black wins (0-1) | Draws (1/2-1/2) | Hydra wins | Hydra loses  

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 43 OF 43 ·  Later Kibitzing>
Oct-24-06  llauro: Yes, since the Rybka has become MultiProcessor and can run in 4 or 8 highspeed (Intel) cores, it seems it's enough to crush the 32 or 64 1-or-2-year old CPUs with a (it seems) simple brute forze program.

I think Zor_Champ should have used Rybka 2.1o if wanted to win the FreeStyle :)

It's a pitty we will never see a Kramnik-Rybka or Topalov-Rybka or anyhuman-Rybka match.

After this result, Hydra should became opensource to try to catch the Rybka!

Oct-25-06  ahmadov: But why there is not game of Hydra vs Rybka in this database? I cannot believe that Rybka is stronger than Hydra.
Oct-25-06  THE pawn: I believe during centaur games the man makes the difference, not the computer. So rybka is probably backed up by better players, but during a real game, Hydra would beat Rybka, or it would at least be a much more equal match, these centaur games do not mean anything.
Oct-31-06  spirit: <It's a pitty we will never see a Kramnik-Rybka or Topalov-Rybka or anyhuman-Rybka match.> <llauru> why?

Nov-09-06  MarvinTsai: So no human being has beat down this thing yet? Terrible...

I really want to see Kramnik(Topalov) makes a sacrifice before the win about 30 moves ahead, and Rybka(Hydra) doesn't have a clue what's going on until position suddenly being so bad. But this is just what I think.

Nov-09-06  jamesmaskell: Our own Arno Nickel beat down this thing...twice. Look on the game list. White and Black. It was in correspondence play though.
Nov-09-06  jhoro: Good news is that Rybka (Computer) is beating it on a regular bases these days. in the last Freestyle Championship Zor_champ (Hydra) finished dead last with 3/9

Nov-09-06  jhoro: I read what was said above and I'd agree there are times when centaur mode is better, but there are many cases when it is just the opposite. According to GMAN's article (the link above) Icy45 was 2/6 in centaur mode and 1.5/3 in pure comp mode.

To Hydra's defence, GMAN thinks that it did not play to its potential. It started 2/3, but then it went down big time. People speculated that they were using something else. We don't know but Hydra has for sure had hard time at the Freestyle tournaments since Rybka started playing this year.

Jan-25-07  schlechtj: First of all, there is no point in Hydra becoming open source because it's advantage is in it's hardware, special chess field programmable chips that calculate nothing but chess positions. Hydra it's self is pretty dumb as far as modern chess programs go, just a lot faster. Its great to see rybka giving this thing a thrashing. The arabs are pouring millions into this huge chess computer trying to get recognition by whipping out their oil money. But, its a case of brains over brawn. Rybka is not that fast but it is using real chess knowlodge. Even though humans probably can no longer keep up with computers of the highest level it is still a matter of man vs. machine. Rybka is showing us that a mans chess knowlodge when applied properly to a chess program can still whip something that is purley built for speed (by a factor of probably a thousand!). Vas is the first IM to program a chess program an look at the results. Hopefully we will soon have a GM who can program apply his knowlodge to a chess program. Now THAT would be something.
Feb-08-07  afioonov: It is beautifull too see how hydra is being crushed.Arabs+British worms thought,they have the final solution for chess,but freestyle championships proved them wrong.Chess still needs the creativity of humans to be alive.I would like to thank Arno nickel for his beautifull wins over hydra in 2004 and the Czech Xakru for crushing this stupid machine.I can see arabs crying over their final solution.
Feb-08-07  LoFarkas: The Hydra team should hire Vasik Rajlich to write a better program for them... and do it double quick before they get really badly embarrassed.
Feb-08-07  truefriends: Nickel defeated an earlier version called Scylla... The final and full version of Hydra has NEVER been beaten! please show me the game against Xakru as i cant find it here on
Feb-08-07  truefriends: <Assassinater>: according to the Xakru game my Fritz finds it very hard to understand the white play. BUT after a long think it only finds a DRAW in the final position!
Feb-28-07  TheHurricane3: If Hydra was ever a person he would be non other than Shaquille O'Neal.
Premium Chessgames Member
  WannaBe: Yes, I bet Hydra can't make a free-throw either. :-))
Feb-26-08  The Rocket: why is not hydra on this list?: does it go by another name?, and why was not hydra in in the 2007 world computer championships(or was it?)
Jun-25-08  Balthasar: Is Hyrra active in the computer chess scene?

The last game it played in this database is in 2005...

Nov-24-08  Open Defence: I wonder if Rybka scales to that hardware
Apr-23-09  myschkin: . . . ... conficker.hy32 ?

maybe a false positive

Apr-23-09  MaxxLange: maybe wherever their site is hosted is pwned, too
Apr-10-10  DiscoJew: Hydra is dead.
Aug-01-12  Chess Magician: Why was Hydra not used after 2005 ?
Aug-16-12  Xeroxx: I Want to be a Machine.
Dec-25-12  Xenon Oxide: It seems like the project is dead.
Dec-06-13  Zappa XP: Humans, you've pretty much been obsoleted!
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