We are glad to inform you, that Rybka 4 Aquarium and Deep Rybka 4 Aquarium with new Rybka 4 engine are available for preorder in our shop. Both items are planned to be released in the first part of May. The actual release date is yet to be determined, please follow our announcements on this page.

— Rybka 4 Aquarium Download - €47.20 / $59.00 | DVD - €49.99 / $62.49
— Deep Rybka 4 Aquarium Download - €95.20 / $119.00 | DVD - €99.92 / $124.90
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With every Deep Rybka 4 Aquarium / Rybka 4 Aquairum package you will also get a bonus of Openings Encylopedia 2010, 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.

If you’re Deep Rybka Aquarium 2010 / Rybka 4 Aquairum 2010 customer you will also get a free Opening Lab training course.

Both packages of course include the new powerful Rybka 4 engine. Read more what’s new in the upcoming Rybka 4 Aquarium.

Rybka 4 Aquarium book is also available for preorder, both for download and on DVD.
It includes over 18,000,000 positions and provides latest chess theory approved on millions of advanced chess games and matches of top human players.

For download — $25/€20
On DVD — $30/€24

Chess Assistant 11 is also available for preorder in three packages:

— Starter for download / on DVD
— Professional for download / on DVD
— Mega with Gold Nalimov Tablebases

You can also upgrade from Chess Assistant 10 for a lower price. Check out Chess Assistant & Databases catalog.