To start playing, download the client, install it on your computer and register a new account.
If you have never used our client before, consider watching the video introduction. or read the manual.
Membership at ChessOK Playing Zone providing you with full membership rights is available here.

Proceed to play

Requires Adobe Flash Player to be installed. Simply register a new account and start playing. Note that most of the Playing Zone services are only available in the dedicated gaming clients.

With this app you can play in the ChessOK Playing Zone on your iPhone or iPad.

Requirements: Compatible with iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (3rd generation), iPod touch (4th generation), iPod touch (5th generation) and iPad. Requires iOS 5.1 or later. This app is optimized for iPhone 5.

Install this app to play in the ChessOK Playing Zone on your Android-based device.

Requirements: The application can be installed on Android 2.2 devices and newer, supports English and Russian.

Test you chess skills and challenge one of the strongest chess playing programs in the world! You have three levels of difficulty to select from and it’s possible to change the appearance of your chess pieces.

Click New Game to choose the colour of your pieces - White or Black. To enter a move you should click on a piece and drag it to the desired square.

Do you enjoy solving chess puzzles? We invite you to test your chess skill for free on our online chess puzzles!

There are 1200 chess puzzles for different levels, from beginners to intermediate players.

The Opening Tree mode from our chess bestseller – Chess assistant - is now available online! You can now receive detailed statistics on all opening moves carefully classified and stored in our opening database.

You can copy the moves in the PGN line above the statistics table and it’ll be a full PGN file that can be inserted into any chess program. You can also change the appearance of your chess pieces or flip the chess board. A Takeback function allowing you to go one move back is also available.

ChessOK provides weekly chess databases containing 2000-3000 new games in CA and PGN format. Save file on your computer, unpack, and then open and analyze it in your favorite chess program (we recommend our Rybka 4 Aquarium and Chess Assistant 11). Latest Game Service available here.

Online access to all 3-4-5-6 Nalimov Tablebases

Here you can receive evaluations and variants for all 4-5-6 piece endings with 100% probability! Just drag & drop pieces to the chess board to make a necessary position and click Evaluate. Pay special attention to the fact that you can’t place more than 6 chess pieces on the chess board at once!

You can change the appearance of your chess pieces and drag them to another square on the board to change the initial position. To select the colour of your pieces click Switch turn. If you want to remove a piece from the chess board, just click a cross sign on it.