The Rybka4 opening book is a high-class compilation of opening theory. It was developed for the world's strongest chess entity - cores cluster Rybka and. Rybka 4 Opening Book is a thoroughly researched and up to date collection of modern opening lines. It can be used as an opening book in chess engine. Rybka 4 opening book for Aquarium. The following articles were written by Dadi Jonsson for his monthly column on "Chess Cafe". The subject of this article is.

Rybka 4 Book

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The Rybka 4 opening book is a high-class compilation of opening theory; It was developed for the world's strongest chess entity - cores cluster Rybka and. Rybka 4 is delivered with the new user-friendly Fritz 12 interface and contains a database of million games and includes Sold by: Book Depository US. What I am most interested in is the benefits of owning both Rybka 4 and the Rybka Book. Also, do you need Rybka 4 to use the Rybka Book?.

There have been 2 updates since that match was played.

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I did not run the match. A fast time control would have been used to get a large number of games. I see, of course, because you have studied the book well, being on the Hiarcs team. I need book guidance for the opening part of the game, as usually, i can get an advantage by playing good moves early on and yes, usually white has the slight upperhand Why did you not continue testing with the updated books and let us see the stats?

Thanks for the info.

I suggest fast time controls and long ones as well, to determine the true scores Are you planning to use the book as reference for OTB play? If so, you should relax and download either book knowing that your memory will be the limiting factor, rather than the book itself. OTB play and correspondence games When Kasparov played his match against Fritz X3D, he tried to avoid king pawn openings because his disadvantage in opening theory made them too dangerous Thanks for this information Banned for Life!

Kasparov is a genius, he is able to convert a seemingly losing or draw position to his advantage either a draw or a win respectively. Well, the human mind may have its limits the disadvantage against the fritz book but his experience in different openings is the key to his success in chess games. The books are out there anyone can run tests on them.

Machine resources here are limited. An 8 core machine works on the book. It's not obvious that engine-engine tests are better than a weak indicator of a book's utility in OTB or CC. Maybe the best book would just notate lines that lead to unclear positions, allowing people to do their own analysis I see Hiarcs book was made and checked tested with an 8 core machine while Rybka was made and checked tested with core cluster I see, Harvey with him being part of the rybka team, did he not make the book with the use of the cluster?

Hehe, interesting, but you may indeed have a point as neither Jiri nor Vas is providing us answers here Jeroen was more helpful, I wished that Jiri made the book with Jeroen to produce a superb book Jeroen's Rybka 3 book was made and checked with a quad core computer There seems to be not a lot of info for the rybka 4 book, but I implied through this that he made it using the cluster: Yes, but for Rybka 4 I moved my priorities away from the tournament book which I used with the Rybka cluster.

Can it be a profession? What is so cool in openings anyway?

I took my first steps while testing on Playchess a few years ago, but I could hardly call this making a book. I started to prepare a real book for the Rybka cluster during the summer It is really interesting to analyze unknown positions and ideas from chess books, chess practice or computer games, and to find your own solution.

However it is not possible to do this every day for eight hours. Today's chess preparation of players is very deep — it is not surprising that in some games players lose in the middlegame because the opponents simply know the lines for dozens of moves, from the opening to the endgame.

This is even worse in computer games: I seriously doubt Jiri gets much, if any, Cluster time for development. Consider one other thing. If you have 1 milion positions in an opening book how long would it take you to Computer check each one?

Rybka 4 Opening Book (PC-DVD)

Probably this is my last post on this one. Am picking up Hans and Johan at the Airport this morning and then spending the day with Mark. I will try and mug Hans and get you a free copy of Jiri's updated Rybks book. Tomorrow I am off to Tel Aviv. I see, thanks for the info Harvey about the Hiarcs book development! I see, okay, opinion on Jiri accepted, so far, neither Jiri nor Vas has reacted on this. Indeed, one million positions will take a long time to check i remember Jeroen making a comment on how long he prepared the Rybka 3 opening book Hmmm, it's really difficult to decide There ought to be different moves that work depending on the time control, i.

A book aimed at slower play has to aim for variations that give the highest engine evaluation, but in these cases it's assumed that the book is going to play a lot of games, so it's more important to get a good evaluation out of book in as much positions as possible than to check if the engine does actually understand them, or plays the right moves out of book. But if the engine's evaluation is good enough, the engine will play good out of most of those positions.


From what I've read on the forum, Hiarcs Book belongs to this category, and it's a book aimed at defeating Rybka with book wins, someone even posted a game where with the book Pocket Hiarcs defeated Rybka on a PC.

It doesn't work like that, a refutation is found that works at one time control but doesn't on another, or even, at the same time control a refutation of the refutation is found, or what I'd like to call a "metarefutation" when a refutation of a refutation of a refutation is refuted , chess is so complex that you can go a long way like that, or you can play any move you wish if you have analyzed it and its "refutations" enough.

Can't tell because I don't have the Hiarcs Book, I can only comment on what I've perceived from what has been posted. And anyway, it depends on, for what are you going to use the book. Thanks Vytron. Hmmm, your opinion on Rykba 4 opening book's strengths, makes me somehow want to download Rybka 4 instead of Hiarcs , unless it can really deliver what it was made for, to be the best, most updated, strongest opening book.

Hiarcs website seem unresponsive to my concern, so I'm having second thoughts of downloading it. They lack track record and they do not respond promptly. Just remember I'm a Rybka beta tester and Harvey works for the Hiarcs team, so there ought to be some sort of bias, my strongest suggestion is that you get information from a neutral source that has both books and has used them for corr play.

Because you're going to use it for correspondence games, right? Otherwise the Hiarcs book will be the better choice! Thanks Vytron!

Rybka 4 plus Rybka Book

Very helpful posts, I'm learning a lot, as you really make me reflect on many things Correspondence games and human tournament preparation hoping to be at the first place everytime, to have more money to download the things that i want Quoting from the Hiarcs book site: Available now for book subscribers is the latest September opening book with 2,, positions and , variations includes statistics from , top quality games. TOP human practice, correspondence chess games and computer chess games up to April And this is only the starting point: I find it hard to decide because at present, i only have money to download one since I didn't win the top prize in a local tournament where I participated My expectation is that Rybka 4 has a lot of openings where I can practice games, though it is no longer updated but it was thoroughly checked because even at present, Hiarcs is having a hard time to beat it completely, despite the updates My expectation on Hiarcs is that, it doesn't have that much lines in it, but it plays the most common lines with superb quality because the latest opening theories are incorporated with each update.

I didn't know it would be this difficult to decide, which one I'd download, given that I can only download one at present I've been doing some research, but so far, there is little information available and all are inconclusive, as to be able to make a choice beyond a reasonable doubt My last suggestion is to request a random number from Hotbits, and download the Rybka 4 Book if you get an odd number, or the Hiarcs Book if you get an even one, since they use radioactive decay to choose them you'll ensure that in some quantum reality you download the other one, or that you download both books at the same time from the perspective of an outside of the universe non-observer https: For this you'd want to download the most unpopular book, and I daresay it's the Hiarcs one that is, downloading the Hiarcs book will be an advantage because it's more likely that the opponent doesn't have it.

The converse of 1, and probably cancelling it, you're already at a disadvantage from the defensive perspective because you don't have at hand the refutation of the ideas on such books, if they're played against you, you have to find them in real time. For this you'd want to download the book that is more likely the one your opponent is relying on, and that would be the Rybka book. However, there are plenty of other books that they may be relying on, or they may be doing it "the Harvey way", leaving book early and trying new problems for you to solve from the start.

But against such opponents it doesn't matter what book you have, you'll be out of book soon anyway. If you are going to be this kind of player the book would just be a reference of what to avoid.

The result of fast time control games between the Rybka Book and the Hiarcs Book, tell you very few about the quality of their moves, so head to head results can more or less be ignored because you're not going to use the book to play unassisted chess against other engines or so. There's nothing wrong in that the Hiarcs book has 8 times less positions in it, that just means Rybka book is more wide in its coverage of them so that you'll be deep in book in most variations unless the opponent plays something off-shot while the Hiarcs book is more specialized on the variations that it plays.

That is, if you wanted to play the book moves of these books, Hiarcs would give you less options of deviation or playable moves , while the Rybka book would give you more move choices on a given position.

Presumably the Hiarcs variations would go deeper and would go to positions that Hiarcs's opponents play badly, but there would be fewer of them. The updates don't play much of a role for human tournament preparation, unless you're planning to memorize the whole book or something, actually I'd guess the Rybka book would give you more freedom in expanding your mainlines, while Hiarcs would make you consider new mainlines and trying new things it's specialized at it's mainlines.

The updates would be very useful for correspondence games, if you get to reach a position that has just been updated that shows you a promising variation your opponent doesn't have.

For correspondence games the Hiarcs engine included with the book will come in handy, Hiarcs sometimes gets the right idea of the position and will offer valuable input, until Critter 0. I don't have Hiarcs 13 but I assume it hasn't changed. Of course if you're from those guys that stick with a single engine for analysis this won't be a factor and Hiarcs would remain unused on the hard drive. It shows that the data in the tree window is ordered by the leftmost column in this group.

Clicking the title reverses the order. Clicking the title of another column orders the data by that column. He began with high-level correspondence games Elo rating over , but added more games, including chess engine games, as he continued working on the book. The first column shows the number of games where the corresponding move was played, then we see how successful that move was and the third column shows the average rating of players that played this move.

Since the database contained computer games, the ratings displayed in this column are often quite high. The next column is the CAP column. This is based on chess engine analysis of the position after the move in the move column.

The evaluations are mostly based on Rybka 3.

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This column, like many others in the opening book, can be helpful when looking for interesting ideas to explore in the opening. Sometimes looking at the evaluation by itself may raise some questions, but more often it is the comparison of columns, based on different sources of data that can give new ideas.

This group is based on over four million games almost exclusively played by human players — the Hugebase database. The first column is the number of games where the corresponding move has been played. The second column is the success rate for the move and the third column shows when the move was last played. This is one more step in the direction of adapting Aquarium to the needs of correspondence players see Correspondence Chess with Aquarium , but the data is also of interest to other players.

The quality of games played in recent years by strong correspondence players is very high. Many organizations, including ICCF, allow the use of chess engines so you can be sure that the statistics are based on games of high quality. Now, if you actually play in ICCF or other chess correspondence events, this data will be of particular interest to you.

Using the Data Instead of relying on a single source of data, the Rybka 4 Aquarium Opening Book allows you to compare and draw your own conclusions based on the comparison of five different sources of data.

Sometimes you will see positions where there is a fairly good agreement between the statistics and you will probably not see any reason to doubt that they are correct. The following position is an example where there is considerable difference between the statistics. The moves leading to this position are 1.

Nf3 d6 3. Nxd4 Nf6 5.

Rybka 4 Book by Jiri Dufek

Nc3 a6 6. Be3 e5 7. Nb3 Be6. The following screenshot shows the relevant columns from the Rybka 4 Aquarium book for this position. The most common move by far is 8. If you are studying this opening, you might want to choose one of these moves for inclusion in your repertoire, but which one? You can start by comparing how successful these two moves have been in practice. If you look at the Rybka4 column group, you will see that 8. However, if you look at the results in high-level correspondence games, you see a completely different picture and 8.

In this case the number of 8. After examining this data, you can decide if you want to choose the most popular move or spend some time on examining 8.

If you are looking for interesting ideas to explore in the opening, you would probably want to have a closer look at 8.

If you are really looking for novelties, you should not hesitate to explore even the red moves in the opening book, when the statistics or CAP evaluation indicate that they might be interesting. Here is one example in the Philidor Defense, 1. Nc3 Be7 6. Bf4 O-O 7. Qd2 c6 8. O-O-O b5 9. Other moves in the book are colored red. One of them, Na4, has only been played three times, but it has been quite successful and scored eighty-three percent.

Normally you would ignore statistics based on so few games, but here we can see how helpful the additional data in the opening book can be. Looking at the CAP evaluations, we see that the evaluation of With this additional information, Na4 starts to look like a very interesting move! If you see similar statistics in the opening book for a position in your favorite opening, you should definitely have a closer look. Perhaps you will surprise your opponent the next time you play the opening!

Using the Book in Engine Competitions The general rule in Aquarium is that when you need a particular feature, it is available where you are going to use it. A good example of this is the selection of an opening book for an engine competition.

In the screenshot shown above, I am creating a match between Rybka 3 and Rybka 4 and both engines will use the Rybka 4 book to select their opening moves. This means that after the first eight moves they will stop using the book and start to calculate their moves. Using the Book When Playing When playing against the computer and you want the chess engine to use the Rybka 4 book, there are two ways to do that.I have the greatest respect for the other team members.

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Bxd2 cxd4 Nxg5 hxg5 Do you use the new features of IDeA in Aquarium, such as remote engines? The simplicity of a beautiful wood chess board and pieces with a wood clock - heck - it doesn't get any better than that.

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