Rybka 4 Aquarium offers advanced analysis functions, game commenting, searching, powerful chess trees, playing, databases and much more.

With a Rybka 4 Aquarium DVD you will also get a bonus of Openings Encylopedia 2010 DVD, which includes rich theoretical material on all the openings, more than 8000 annotations from GM Kalinin and 500 000 expert evaluations to key opening positions as well as powerful search system.

Short description:

• Rybka 4 engine - World Computer Chess champion and rating lists leader. Rybka 4 can be also used in Fritz and other chess programs
• Analyze and annotate your games with Aquarium's advanced analysis methods.
• Databases with fast searches
• Powerful and fast chess trees
• Play against the computer
• Publish your chess text: Print, word processor or web
• Free internet chess server access for playing against chess players all over the world
• Database: 4,600,000 games (up to April 1, 2010). Lightning fast database searches. Chessbase/Fritz CBH format (reads and converts), Chess Assistant CDP, PGN and EPD databases
• Full Windows 7 (32 & 64 bit) and Vista compatibility.

What's new in Rybka 4 Aquarium compared to Rybka Aquarium 2010:

• Most powerful Rybka 4 engine!
• New correspondence chess module and improved support for correspondence players*
• Further IDEA improvements*
• Interface improvements*
• Various new features* - read more
* included in free update for Rybka Aquarium 2010 customers

What's new in Rybka 4 Aquarium compared to Rybka 3 Aquarium

• More powerful Interactive Deep Analysis (IDeA): Multi-engine, local or remote analysis, multiple analysis projects, multiple root positions and more. It provides better automatic analysis and much more effective ways to control the analysis process and the shape of the analysis tree.
· Analyzing with many engines
· Analyzing on a network of computers
· Multiple IDeA projects analyzed in parallel
· Multiple analysis "roots" for a single project
· Shaping the analysis tree
· Move repetition detection
· Automatic backup of analysis trees
· Browsing the analysis queue

• Greatly enhanced database capabilities. Increased speed when searching and converting databases.
• Interactive Chess Books or iBooks.
• New and enhanced publishing features. Publish interactive chess content on web pages and blogs (also supported on the Rybka Forum). The iBook format supports both small and large publications, from a single chess puzzle to a fully featured books with hundreds of pages.
Publish as iBooks or convert to a word processor format. Animated GIFs with graphical annotations can be published on web pages and blogs.
• Full Windows 7 (32 & 64 bit) and Vista compatibility.
• We'll continue releasing our popular free updates with new features.
• Great support forum (http://rybkaforum.net) monitored by the developers.

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

System requirements: PC, 256 MB RAM, 4GB of free disk space, Windows 7/XP/Vista.