Rybka - for the serious chess player. [ #Rybka engine ] [ Rybka engine ]

Rybka engine

Here you can download Rybka 2.3.2a (for free) or purchase Rybka 4.

There's also information on the official Rybka 4 opening book by Jiri Dufek.

If you want to know more about Rybka, please read the Rybka FAQ.

For Rybka 3 customers the Rybka 3 user area may be interesting.
For users of Rybka 2.3.2a or Rybka 2 customers the specially written FAQ may be interesting: Rybka 2.0,2.1,2.2,2.2n2 and 2.3.2