ChessOK develops high quality software for a wide spread of users: professionals, amateurs and young chess players. Below you can find detailed information about all of our software.
ChessOK.com » Chess Software
Rybka & Aquarium Rybka is the strongest chess engine and the computer world chess champion. Rybka family of products allows users to take full advantage of Rybka's power through effective and innovative analysis methods. Besides Rybka we offer new modern user interface, Aquarium, which was developed specifically for it. Buy Rybka 4 AquariumRybka 4 Aquarium – revolutionary analysis and database tool, combined with the world's strongest chess playing engine, Rybka 4. Aquarium offers advanced analysis functions, game commenting, searching, powerful chess trees, playing, databases and much more. Read more.

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Buy Deep Rybka 4 AquariumDeep Rybka 4 Aquarium – multiprocessor (deep) version of the Aquarium. It also includes 4,600,000 game database. Read more. More products in the category (click to expand)
Chess Assistant and Databases Chess Assistant - the most advanced chess database system. It includes Rybka 3 and is available in various combinations with our database products. They include databases of 3,5 million games, 370,000 correspondence games, opening databases with tens of millions of positions analyzed by Rybka and other chess engines and full endgame Nalimov Tablebases for all 3-4-5 and 6 piece endings. Buy Chess Assistant 11 StarterChess Assistant 11 Starter – the most advanced chess database system. Lightning fast searches in databases with millions of games. Automatic weekly updates with thousands of new games. Advanced analysis functions, built-in CQL search and much more.
Starter package includes Rybka 4 engine and 4,600,000 game database. Read more.

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Buy Chess Assistant 11 ProfessionalChess Assistant 11 Professional
professional package includes multi-processor (multi-core) version of Rybka 4, Chess Opening Encyclopedia 2010 with tens of millions of positions analyzed by chess engines, and the database of 4,600,000 games. Read more.
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Peshk@ Training Courses ChessOK is proud to announce the immediate availability of Peshk@, the newest member of its training and improvement family. Peshk@ is a modern chess improvement and training tool from the developers of CT-ART, one of the most popular and respected tactics training programs.
Before purchasing a training course, please download our free graphical interface Peshk@ with demo versions of training courses and install it. (Manual in PDF)
Buy CT-ART 4.0CT-ART 4.0 – Finally a new and improved version of the legendary CT-ART has been released! This excellent tactics course has been voted more than once by the chess experts as the best chess training program. Buy Opening LabOpening Lab – This is a perfect opening manual. It features a theoretical review of all the chess openings, which are illustrated by instructive games of the greatest chess players. More products in the category (click to expand)
Chess Training Programs Training programs are developed in cooperation with some of our best trainers. They are based on a proven training methodology and are invaluable tools for improving chess players. Our products cover the training needs of every chess player from the total beginner to the grandmaster level. Every aspect of the game is covered from the opening to the middlegame and the endgame and from strategy to tactics. For those who want to learn chess, we teach the rules and show how the pieces move in the award winning Dinosaur Chess. Buy How to Win Miniatures at ChessHow to Win Miniatures at Chess – This course is intended for club players and includes more than 5900 exercises for mating in 2 moves in the opening and about 700 ones for mating in 3 or 4 moves. Buy Simple DefenseSimple Defense – Every chessplayer has to master and consolidate some basic defensive skills such as withdrawing or protecting a piece, interception or attacking an opponent’s piece. More products in the category (click to expand)
Pocket Software (Handhelds and Cell Phones; Symbian & Java) As handheld devices have become more powerful they have also become more popular for playing and studying chess. ChessOK is already offering a range of products for these platforms. No fewer than 16 different programs are available. Many of them are training programs. Pocket Champion is an example of a chess playing program on the Pocket PC with a range of options. We even offer programs for mobile devices to play on the ChessOK internet server, The Playing Zone. Buy Pocket Chess Opening InstructorPocket Chess Opening Instructor – is an interactive tutorial for Pocket PC for intermediate players. This is a perfect opening manual. The program features a theoretical review of all the chess openings. Buy Chess Champion for SymbianChess Champion for Symbian – Playing program “ChessChampion” for Smartphone is a universal chess partner both for amateurs and professional players. The program possesses a wide range of functions. More products in the category (click to expand)
Opening Encyclopedias In this category we offer a general opening reference along with several products, each focusing on a single opening. These have been prepared by our chess masters, including GM Alexander Kalinin. Buy Chess Openings 2010Chess Openings 2010 – is an excellent tool for studying the openings, building opening repertoire and fast 4,200,000 games database searching. Buy Modern Chess Openings SetModern Chess Openings Set (5 CDs) – This Set includes five excellent programs for five popular openings: Sicilian Defense, French Defense, Kings Indian Defense, Slav Defense, 1…Nc6!? The each program allows analyzing while playing against the built-in chess program Crafty as well as editing variations, searching for games in the database. More products in the category (click to expand)
Game Collections We have published several annotated game collections of the world champions. Our current catalog includes Alexander Alekhine, Emanuel Lasker, Mikhail Tal, Jose Raul Capablanca, Mikhail Botvinnik and Boris Spassky. Buy Five World ChampionsFive World Champions – The Five World Champions program comprises of 5 wonderful programs devoted to five great chess champions: Emanuel Lasker, Jose Raul Capablanca, Alexander Alekhine, Mikhail Botvinnik and Mikhail Tal. Buy Mikhail Tal - 8th World ChampionMikhail Tal - 8th World Champion – The most complete collection of Tal’s games ever compiled. Contains 2,592 games, covering the entire career of the most brilliant attacking chessplayer in history. More products in the category (click to expand)

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