ChessOK is glad to announce the release of an extra strong Houdini 2 book specially created for using with the Houdini 2.0 engine. Houdini Opening Book provides the latest chess theory that proved itself in millions of advanced chess games and matches of top human players. It includes over 65 million positions.
The book can be used in Aquarium GUI and in other GUIs (Fritz etc.) via Aquarium Book Adapter, supplied with Aquarium build 490.