When buying Chess Assistant 11 this autumn you get ChessOK Aquarium 2011 and Chess Opening Encyclopedia 2011 for free!

These three magnificent programs fully supplement each other. In any of them you can use the Rybka engine and games bases.

Chess Assistant 11 with Deep Rybka 4 is a unique tool for managing chess games and databases, playing chess through the Internet, analyzing games, or playing against the computer. Experience lightning fast searches, even in its biggest database with 4,7 million games.

Internet Game Service 2011 lets you download nearly 2500 new chess games weekly in Chess Assistant & PGN format to expand your game database. The game packages also include tournament tables and results.

ChessOK Aquarium 2011 offers advanced analysis functions, game commenting, powerful chess trees, playing, and much more. Play chess against the computer (any installed engine) from any position with flexible time controls.

Tournament or Fun mode with hints and drawbacks. Automatic rating calculation. Material handicaps and rating handicaps (USCF rating 700-2400). Database: 4,700,000 games (up to April 1, 2011).

Chess Opening Encyclopedia 2011 is excellent program for learning chess openings which 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.

The material on openings is based upon over 500,000 expert evaluations, 8,000 annotations to key moves, a base of 4,7 million games and over 40 million of evaluations by the Rybka program.

Deep Rybka 4 engine can be used in Fritz and other chess programs.

Language versions: English, Spanish, German, French and Italian versions are available.

System Requirements: 128 Mb RAM, Hard Disk 1 Gb, Windows 7/2000/NT/XP/Vista.

Sergey Rublevsky - Champion of Russia: “I have used Chess Assistant with great pleasure for more than 10 years already.”