From May 15 to May 23, the following special deals are available. All offers stack!

Special Offer 1: All products from the Combo Packages category of our shop receive a 35% discount!

Special Offer 2: Buy any chess software from our shop and choose any course of the Play Like World Champion series as a bonus.

Special Offer 3: Buy Houdini 3 Aquarium, Houdini 3 PRO Aquarium, Chess Assistant Starter, Chess Assistant 13 Professional or any Training Package (DVD, download) and choose any one download course for $20/€16 or less from any of the following categories: Courses for Beginners, Courses for Club Players and Courses for Intermediate Players!

Special Offer 4: All owners of ChessOK Aquarium 2012, Houdini 3 Aquarium, Houdini 3 PRO Aquarium and Chess Assistant 13, Professional package receive free online access to Lomonosov Ending Tablebases via the Aquarium interface starting March 26 and until December 31, 2013.

Special Offer 5: Order any 2 programs in our web shop and get a 3rd program of your choice (within the price range of the first two) for free!

Special Offer 6: Order products for more than $120/€100 and choose any download program with a price of $25/€20 or lower as a bonus!

Note: Specify the bonus course(s) you want to receive in the comments field, when filling the order form.

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.

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

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 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.

We are proud to announce the release of Chess Assistant 13 with Houdini 3, a professional software for chess database management, analysis, playing and publishing.

The new Houdini 3 engine, updated databases, trees and CAP evaluations - all this makes Chess Assistant 13 a great choice for any seriuos chess player.

Chess Assistant 13 comes in three packages: Standard, Professional and Mega. Read What’s the Difference for version comparison.

Game Service: May, part 3. All updates are available on this page.

The download version of a new course on chess tactics, Chess Tactics for Club and Intermediate Players, has been released. Chess Tactics for Club and Intermediate Players contains 230 teaching examples introducing you to typical chess combinations and 350 new exercises designed to develop your playing skills and reinforce the knowledge acquired. Though many don’t know it playing Chess for money by gambling is a hugely popular pastime. Chess players will also love reading the many online slots reviews, tips, tactics & more you find online. If you are a Chess player finally considering taking the plunge, consider using a party casino bonus code before you start playing skill based or games of chance online. The exercises in Chess Tactics for Club and Intermediate Players are classified according to more than 30 tactical methods and motifs.