Chess Assistant 15 with Houdini 4 is a unique tool for managing chess games and databases, playing chess through the Internet, analyzing games, or playing chess against the computer.
Starter package includes the best playing program – Houdini 4, Chess Opening Encyclopedia mode, a powerful search system, the unique Tree mode, databases of about 6.2 million games in total (Nov. 1, 2014) that can be automatically updated with 3000 new games, access to 7-piece Lomonosov Tablebases and more!
When it comes to searching, you will not find a more powerful system.
Houdini 4: The World’s strongest chess program, which supports up to 6 cores and 4 GB of hash. You can connect Houdini 4 UCI engine to ChessOK Aquarium, Fritz and ChessBase.
Houdini 4 can perform various types of analysis for any needs: multi-pass game analysis, Interactive analysis, Background analysis.
Chess Opening Encyclopedia includes rich theoretical material on all the openings, more than 8000 annotations by GM Kalinin and 40 million of evaluations by strongest engines to key opening positions. The key system for any opening can be customized.
Premium Game Service will keep you game database automatically updated with more than 10 000 new games each month!
What’s the difference? – Check the comparison table we made to help you choose the best product for your needs.
| ChessOK products comparison | ChessOK Aquarium 2015 | Houdini Aquarium 2015 | Houdini PRO Aquarium 2015 | Chess Assistant Standard | Chess Assistant 15 | Chess Assistant 15 PRO |
| Engine Included | Rybka 2.3 | Houdini 4 | Houdini 4 PRO | Rybka 2.3 | Houdini 4 | Houdini 4 PRO |
| Approx. Engine Rating | 3000 | 3350 | 3400 | 3000 | 3350 | 3400 |
| Engine Max Cores | 1 | 6 | 32 | 1 | 6 | 32 |
| Play against the computer | YES | YES | YES | YES | YES | YES |
| Playing with handicap | YES | YES | YES | NO | NO | YES |
| Game Analysis | YES | YES | YES | YES | YES | YES |
| Interactive Deep Analysis (IDeA) the most advanced analysis method | YES | YES | YES | NO | NO | YES |
| Tree Mode | YES | YES | YES | YES | YES | YES |
| Advanced Tree Mode, building new trees | NO | NO | NO | YES | YES | YES |
| Advanced database management, idantical games detection | NO | NO | NO | YES | YES | YES |
| Lomonosov Tablebases access in the Aquarium interface | YES | YES | YES | NO | NO | YES |
| Lomonosov Tablebases access on chessok.com | YES | YES | YES | NO | YES | YES |
| Chess Openings Encycopledia 2014 (integrated or bonus disc) | NO | YES bonus disc | YES bonus disc | YES integrated | YES integrated | YES integrated |
| Publish your chess text: Print or word processor | YES | YES | YES | YES | YES | YES |
| Publish to web and blog | YES | YES | YES | NO | NO | YES |
| Databases with fast searches | YES | YES | YES | YES | YES | YES |
| Advanced Search System | NO | NO | NO | YES | YES | YES |
| Databases Size | 6.2 million | 6.2 million | 6.2 million | 6.2 million | 6.2 million | 6.2 million |
| Weekly database update | 1500 games | 1500 games | 1500 games | 1500 games | 3000 games (auto update) | 3000 games (auto update) |
| Multilingual | YES | YES | YES | YES | YES | YES |
| Windows 8 compatible | YES | YES | YES | YES | YES | YES |
| 64-bit support | YES | YES | YES | YES | YES | YES |
| 64-bit optimized | YES | YES | YES | NO | NO | NO |
ChessOK Aquarium 2015, Houdini Aquarium 2015 and Houdini PRO Aquarium 2015 were released on November 30, 2014.