August 6, 2008
Rybka 3 is the latest UCI chess engine from the Rybka line. Our previous version, Rybka 2.3.2a, is now nearly 14 months old, so the changes are extensive.
- The evaluation function is more accurate. There is a long list of useful new evaluation terms. The terms also interact in a more balanced and mature way.
- The search is more efficient, especially in the sorts of sharp, murky positions in which chess games are often decided.
- The multi-processor support is improved.
- The code and algorithms have been cleaned up, leading to more solid and predictable behavior.
- The opening book is improved and expanded and now fills the role of a general reference. Note: this book is sold separately, details here.
- Persistent hash, for storing and loading previous analysis
- More efficient multi-variation mode
- Chess 960 support
- More intelligent contempt, which takes into account the trading of material, symmetrical structures and other drawish features
- A special "human" version, whose evaluation aims at consistency with human grandmaster practice rather than at success in computer vs computer play
- A special "dynamic" version, whose evaluation aims at speculative play
There are also a number of other new features which enhance the analytical process but which require interface support. These can be used in the ChessBase and Convekta interfaces which are sold with Rybka 3. Details can be found in the documentation for those interfaces.
All information relevant to Rybka 3 usage is collected here. This includes parameter descriptions, FAQ, installation instructions, known engine issues, etc.
A huge thanks to everyone on the Rybka team, without whom this project would be much less successful and a lot less fun:
- Larry Kaufman for his incredibly accurate work with Rybka's static evaluator (and for not letting me forget about Monte Carlo)
- Jeroen Noomen for again finding a way to push the boundaries in opening book quality and for his never-satisfied approach
- Iweta for Rybka testing, ideas and moral support :)
- Felix Kling and Christoph Kling for an excellent and innovative web site
- Lukas Cimiotti for always having an 8-core machine or three ready for testing, tournament play or analysis (by patzers and non-patzers alike)
- Hans van der Zijden for traveling around the world (or at least North-Western Europe) as our tournament operator
- Nick Carlin for ICC play, opening preparation and testing help
- Dagh Nielsen for contributing to Jeroen's opening book while entertaining the rest of us with his unique working style
- Victor Zakharov and his team from Convekta and Mathias Feist from ChessBase for their enthusiastic interface work
- Rybka testers for not letting the obvious perfection of the code discourage them
- Rybka forum regulars for a steady stream of often-interesting and occasionally-practical ideas
We will consider a number of Rybka ports to other platforms in the next few months. Aside from that, we'll go back into our cave and in the summer of 2009 we'll emerge with Rybka 4.
CONGRATULATIONS on a fine product,one that changes the landscape of computer chess!
He Vas, don´t let us speak about summer 2009 but autumn. I think, summer is the worst time to sell engines. I would like to heat my rooms with Rybka 4 in october 2009. :-)
I see that not all components of Rybka 3 are sold by Convekta(Vas said that the Rybka 3 book is sold separately, but it's only available from Chessbase) while the opposite it's true for Chessbase as it sells all Rybka's components.
If you consider Aquarium as Rybka's part then of course the opposite isn't true in this case also, since Chessbase doesn't sell Aquarium, but i can't find a reason why we should consider Aquarium as part of Rybka 3 and also Vas has not mentioned anything about Aquarium in his lasts reports/FAQs about Rybka 3.
> Ahh, I see...interesting--though Convekta is still basically the primary distributor.
Well, they named Pocket Hiarcs "Pocket Fritz 3" and got away with it, it wouldn't surprise me if Rybka 4 powers Fritz 12 and they don't mention Rybka anywhere.
> Well, they named Pocket Hiarcs "Pocket Fritz 3" ...
Exactly. If they rename Hiarcs for marketing reasons, who is going to stop them from renaming Rybka?
I see no reason to rename everything that chessbase is selling to Fritz.
There are other programs in the world and I see no reason to call every program in the name Fritz.
If market research indicated that Chessbase would sell twice as many copies if they called it Pocket Fritz rather than Pocket Fish, it would be a business decision for CB and Vas, just as it was for CB and Stephan, and CB and Mark for previous versions.
>Either you don't believe branding can be successful, or you don't believe Pocket Fritz is a successful brand.
Maybe this would make good business sense, but my objection is that it would give the false impression that Vas was not the programmer. In my mind, it comes close to false advertising.
Be sure, noone will buy it! :-) But why not Pocket Rybka or Pocket Hiarcs?
/* Steinar */
How do you know what changes there are and how different it will be than the current way of how multi-variation works and how do you know that with the new way it will be easier to understand the reasons of the moves on the board?
Also does this new multi-variation work on all GUIs(Arena,Shredder Classic) or on Aquarium only or on Chessbase GUI that comes with Rybka 3 only?
I don't know if it works with a given GUI or not; I don't use a GUI for Rybka. From my understanding of it all it does is change how much time is spent on each variation, though, so I'd assume it should work in any GUI that can set normal UCI options.
/* Steinar */
Program-X of course is about 150-200 ELO weaker than R3.
I really hope that Rybka 3 is improved in best move testpositions, since i'm tired of reading all these Rybka-can't-find-this-move threads.....
I will not escape from hearing all the Rybka-is-bad-at-endgames threads though.... :-(
I may be wrong, of course ;)
Just a thought, but based on my own experiences over the years. I haven't bought a new release in years, as there doesn't seem to be much point.
I agree that competition may create additional attention. But, I believe Rybka 3 will be very successful - even though Rybka 2 is already the strongest chess program. Likewise, Rybka 4 can be very successful - even if Rybka 3 is still the best chess program.
You forgot to mention the most important person: yourself :-). Thanks for building the strongest engine ever, I am sure August 6th 2008 will be a memorable day in the history of computer chess, as was December 5th 2006!
Kind regards, Jeroen
The special thanks are for you and ONLY YOU Vas.
rybka 3.2.a.exe like that this new file is completely different so my shredder interface wont allow me to add it to be able to use the
program any reasons why what can i do about it or do i need to just buy the cd when it comes out to chessbase instead?
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