Buy 3 chess training programs for the price of 2
Order any two training programs in our online chess shop and get a third training program absolutely free. If your order is more than $120 / €100 Euro, you will get additional present.

New CT-ART 5.0 combines three excellent courses guiding you from beginner to advanced level.

Chess King 3 MAX and PRO - with Houdini 3!

Chess King 3 MAX with Houdini 3 and Chess King 3 PRO with Houdini 3 Pro are released!

Check out the updated Chess King section of our shop for the full list of new products. Chess King 2 and 3 further develop and improves the original idea emphasizing simplicity and variety in training. 1500 puzzles, unique training modes, powerful Houdini 2 engine, huge databases, 1600 photos of chess players, multiple languages support and more!

Chess King 3 MAX includes the strongest chess engine Houdini 3, and Chess King 3 PRO has the even stronger version - Houdini 3 PRO, supporting up to 32 cores, 256 MB of hash memory and NUMA-architecture.

Chess Openings Encyclopedia 2013

Chess Openings Encyclopedia 2013 is released!

This excellent program for learning chess openings includes theoretical material on every opening, a user-friendly and detailed classification of variations, a quick search option and an option for analyzing games and positions.

Chess King 2 Released!

ChessOK announces the release of Chess King 2!
Chess King 2 further develops and improves the original idea emphasizing simplicity and variety in training. 1500 puzzles, unique training modes, powerful Houdini 2 engine, huge databases, 1600 photos of chess players, multiple languages support and more!
You can download Chess King now or preorder the upcoming DVD version.

If you already own the first installment of Chess King, you can upgrade it.

Lomonosov Tablebases Announcement

Dear owners of ChessOK Aquarium 2012, Houdini 3 Aquarium, Houdini 3 PRO Aquarium and Chess Assistant 13, Professional package.

Until December 31, 2013, you have free online access to 7-piece Lomonosov Tablebases via your Aquarium interface.

Currently, the tablebases available online include 200 most important endings. By the beginning of summer, you will receive access to all other 7-piece endings.

Please download and install Aquarium 2012 Update 2 to get access to the 7-piece endings.

Check out the quick guide for using Lomonosov Tablebases.

Lomonosov Ending Tablebases

We announce the release of Lomonosov Tablebases - the first complete 7-piece endgame database that includes 100%-accurate predictions and optimal solutions to every singe position possible within this limitation.

Experts didn’t expect 7-piece endings to be cracked until after 2015, but ChessOK.com managed to solve the task much sooner to provide you these Lomonosov Tablebases consisting of more than 140 000 Gb of data.

All owners of ChessOK Aquarium 2012, Houdini 3 Aquarium, Houdini 3 PRO Aquarium and Chess Assistant 13, Professional package will receive free online access to the tablebases for the period from March 20, 2012 and until December 31, 2013.

Learn more about the Lomonosov Tablebases

Chessplanet for iOS Released!

ChessOK Playing Zone client for iOS has been released!

This application allows to play chess, participate in tournaments (including team tournaments), communicate in chat with your partners, access the database where all games are stored and available for review.

Download it now from iTunes!

Houdini 3 Aquarium and ChessOK Auarium 2012 Released!

Houdini 3 Aquarum, Houdini 3 PRO Aquarium and ChessOK Aquarium 2012 have been released on CD/DVD and for download!

Houdini 3 Aquarium combines the best interface for chess analysis - ChessOK Aquarium 2012 - with Houdini 3 - the strongest chess engine to date that supports up to 6 cores and 4 Gb of hash.
Houdini 3 PRO Aquarium includes Houdini 3 Pro, capable of supporting up to 32 cores and 32 GB of hash.

ICCF Champions League 2010-2012

cl4_logo01The 4th season of the ICCF Champions League has ended. Almost 200 teams from all over the world took part in it this season. And for the first time, the team of our site ChessOK.com participated in the competition. We played in one of the 4 groups of League B, fighting our way into League A featuring the world’s 13 strongest teams. Even in League B, the overall level of players was extremely high. Teams in our group featured finalists of the World Correspondence Chess Championship, 3 Grandmasters and 22 International Masters.
Modern correspondence play includes heavy use of chess analysis software and databases. The ChessOKcom team relied on a program of its own design – Houdini Aquarium. In addition to game database management, Houdini Aquarium has IDEA, a unique analysis algorithm perfectly suited for correspondence play. The use of Aquarium and IDEA is the formula of our team’s great success: not only we took the first place in our group and made our way into League A, we were also the strongest among the 52 teams of League B! Even more, our players never lost during the competition, winning 16 games and drawing 32! We also won three 1st places and one 2nd in the individual classification.
The next, 5th season of the Champions League starts in October, and our team will play in its main tournament.

Study chess online on Chess King Learn! Time-proven training courses, thousands of examples and exercises.

Start playing right now in your web browser on Chess King Playing Zone! Teams, tournaments, training, analysis and much more!

7-man Lomonosov Tablebases provide deeper-than-ever insight into chess endgame.

Download weekly chess database updates (containing 2000+ games) with latest tournaments and games in PGN and Chess Assistant format.

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