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Up Topic Rybka Support & Discussion / Rybka Discussion / Rybka v2.2n2 or Rybka 2.3.2a - which one is the newer?
- - By Zsolt Kántor (**) Date 2019-05-12 06:07
Both engines are free for download. I'm wondering which one is the newer. Judging by the version number Rybka 2.3.2a?
Also if 2.3.2a the newer, is there any reason to use 2.2n2?

Parent - By Fulcrum2000 (****) Date 2019-05-12 12:09
yes, Rybka 2.3.2a
Parent - - By Innoxvrid Date 2019-05-15 18:55
2.2n2 was more stable and it had better support
Parent - - By Zsolt Kántor (**) Date 2019-05-15 20:10
I will try it. Probably on the Rybka homepage there can be downloaded for free . . . (I hope)
Parent - - By Felix Kling (Gold) Date 2019-05-17 05:40
Here it is
Attachment: (1945k)
Parent - By Zsolt Kántor (**) Date 2019-05-17 11:22
Parent - - By Uly (Gold) Date 2019-05-27 01:19

> Also if 2.3.2a the newer, is there any reason to use 2.2n2?


Anyway, the thing with 2.3.2a is that it lost all the Rybka's amazing playing style, 2.2n2 was the last engine that kept the "Rybka magic" from 1.0 beta that enamored all its fans. 2.3.2a was compared to a shark that stayed underwater the whole game, patiently waiting until the opponent made a mistake, then jumped up to punish it and swallow the position in one gulp. I don't think that was something seen before then, so some people even liked this style better than old Rybka (so... good playing style is subjective). The style was adopted and magnified in the Naum 3.0 engine.

However, if you care about any of that, then there's no reason to use 2.2n2, because again, we had Winfinder, who was the prime of the Rybka 1.0 style, and you can't do better than that.

HOWEVER, who cares about that playing style, when you have Rybka 3, who presented the best Rybka style in the whole series of all Rybkas... Except for Rybka 3 Dynamic, which exaggerated the style on purpose, looking for complications (then again, Zappa Mexico II Dissident did a better job at that.)

HOWEVER, what back in the day looked like "style", turned out to be innacurate moves, as can be seen by matching Rybka 3 againt Stockfish 8. And you will see that the same moves that marvelled people and that were defeating the competition, didn't really work, and S8 would just punish the so called "style",and show the man behind the curtain.

If you want to minimize that you'd want to get Fritz 16 (latest Rybka incarnation) and apply some Mindbreaker settings, and then you'll get a style that is better (as impressive, but less innaccurate) and that plays much stronger chess.

But who cares about Rybka when we live in a time where engines that are better at strength, or at style, or both, are readily available? Nothing beats Houdini 6 at high Contempt, and if you want something Dynamic but not as crazy there's Komodo 10.1. If you don't want to spend money there's Stockfish's derivative Raubfisch (probably the strongest thing with the best style out there for free), but if you like a more solid approach while looking awesome there's Stockfish derivative Eman.

If you don't care about strength then there are engines with a style that makes Rybka look like a puppy, such as Fizbo (playing the craziest moves), or Andscacs (playing the most original) ( - I haven't had the time to test Ethereal or Laser, but we live in the golden age of style - )

And if you have the hardware, the best style I've seen in a chess entity, ever, is, of course, Leela Chess Zero, with moves that requie new words to describe them, so it's an entity that was born from pure style and just got stronger without losing it.

So there's no reason to use Rybka at all, and if there is, there's no reason to use a version before Fritz with Mindbreaker settings, and if you don't want to, there's no reason to use another version than Rybka 3/Dynamic. You have no reason to run 2.2n2 at all, not with at least 17 engines that are worth checking more, because all Rybka did was being ahead of its time, but by comparison there's nothing special there anymore.

(and, yeah, I still feel like an old man babbling about the old days, and I don't know what use having this info in my head does, but Rybkas are collector items and its importance in chess was over too long ago)
Parent - By mpx86 (*) Date 2019-05-27 18:42
Very well Put @Uly, made me nostalgic.
Parent - By Labyrinth (*****) Date 2019-05-28 15:15
Wow what a blast, I had forgotten about Naum and mindbreaker.
Parent - - By Zsolt Kántor (**) Date 2019-05-28 20:45
Eman is a free or commercial engine? Because on the official webpage I can not find any link to download the engine. It just says "Current Stable Version: 3.72", but no link to download.
Parent - By CumnorChessClub (***) Date 2019-05-29 11:22
Below the "Current Stable Version: 3.72" it has Find the author on
Parent - By Uly (Gold) Date 2019-06-02 01:51
Yeah, it's a private engine and you must get in contact with the author to get it (he's on the tournament hall on Sundays), but it's definitively the best Stockfish derivate to use competitively against other engine users online (and best thing, period, unless you have the hardware to run Leela.)
Parent - - By Uly (Gold) Date 2019-06-02 12:08
(Eman's author plays under the Handle "KQRBNP".)
Parent - - By Zsolt Kántor (**) Date 2019-06-02 15:59
That is his username/nick name?
Parent - By Uly (Gold) Date 2019-06-03 00:24
He has many, such as KhalidOmar. You need to download the InfinityChess software, get an account, and look for him on the Tournament room on Sundays from 16:00 to 24:00 Server Time (the server time is shown in the GUI). Sometimes you can find him on those hours playing on the tourney on the weekdays.

Ah, in case of doubt, he can be recognized by being the only person using "Eman 3.80 Beta" on the server, so if you see someone using that, it's him (if you see multiple accounts using that, all of them belong to him).
Parent - - By Zsolt Kántor (**) Date 2019-06-02 16:06
By the way. This is a legal/illegal question. Now when Rybka 2.3.2a and 2.2n2 are free to download and use, it is legal to download it from a torrent?
I'm asking this because on the webpage only the multi-processor versions can  be downloaded. But I found a torrent where both multi and singleprocessor versions are present.
Parent - By Uly (Gold) Date 2019-06-03 00:28
The software became freeware, so it's legal to distribute in any way, including torrents (so it's legal to get it in any way, including torrents.)

Note, though, that Rybka single processor is nothing but Rybka multi processor hardcoded to 1 single core. It means that if you have Rybka MP, you already have Rybka SP, just switch the cores to 1.
Parent - - By Zsolt Kántor (**) Date 2019-05-30 15:12
By the way, about the 2.2n2 engine. I read the Rybka 2's FAQ ( There is a question "Where's the contempt parameter in 2.2n2?" Vasik Rajlich answered that accidentally compiled out this parameter from that version, but it will be back in Rybka 2.3.
My question is, is this compile out thing affects the engine itself? Or is just minus one parameter?
Parent - By Labyrinth (*****) Date 2019-05-30 21:11

>My question is, is this compile out thing affects the engine itself? Or is just minus one parameter?

Just minus one parameter.
- - By Zsolt Kántor (**) Date 2019-05-31 06:52 Edited 2019-05-31 08:46
This is a quite technical question, and if it is not the proper place to post it here just tell me.
Rybka 2.3.2a was released in June 2007. I opened the Rybka 2.3.2a binary with a binary file structure viewer to get the time and date when it was compiled. I used the PEview for this purpose. You can get the link/compile time of an executable if you read the IMAGE_FILE_HEADER section, Time Date Stamp entry of that file. Using PEview the Rybka 2.3.2a binary was compiled in May 2006. My question is: if it was compiled  in May 2006, why was released only in June 2007 (more than a year later)?
Parent - By Uly (Gold) Date 2019-06-02 01:48
That's a very interesting question.

So the answer could be... "to increase sales", at least, the rumors were that Vas has a much stronger up to date engine for himself, for testing, and along the road to create it, he had many, many versions inbetween with jumps of strength, huge jumps. So if he released the strongest one, and he didn't provide enough improvement to justify buying a new version, it'd hurt sales.

It'd make sense to release a year old engine, if it's the strongest thing out there, and 50 elo stronger than the previous version.

(but these were rumors)
Up Topic Rybka Support & Discussion / Rybka Discussion / Rybka v2.2n2 or Rybka 2.3.2a - which one is the newer?

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