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.

ChessOK.com » Houdini Opening Book released!
Houdini Opening Book released! 10 November 2011

ChessOK is glad to announce the release of an extra strong Houdini 2 book specially created for using with the Houdini 2.0 engine. Houdini Opening Book provides the latest chess theory that proved itself in millions of advanced chess games and matches of top human players. It includes over 65 million positions.
The book can be used in Aquarium GUI and in other GUIs (Fritz etc.) via Aquarium Book Adapter, supplied with Aquarium build 490.

Houdini Opening Book (download) - $29.99 / €20.42
Houdini Opening Book (DVD) - $29.99 / €20.42

Read more about Houdini Opening Book
Update Aquarium to build 490 (required for Houdini Opening Book)

Read more about using Houdini Opening Book in other interfaces

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.

More »