Rybka 4 Extreme is a revolutionary analysis, database and chess publishing tool, combined with the world's strongest chess playing engine. Rybka 4 Extreme offers advanced analysis functions, game commenting, searching, powerful chess trees, playing against the computer, databases, advanced publishing features and much more!
Interactive Deep Analysis is the most advanced chess analysis method available today and is greatly enhanced in Rybka 4 Extreme. It's completely new approach make it an essential weapon in the arsenal of every serious chess player and analyst!
* Simultaneous analysis by multiple Rybka instances. Use, 2, 4, 10, 20 or even 50 chess engines at the same time for faster results!