The program has access to an opening book in which a variety of proven opening moves are saved. A ChessBase opening book is a database which exclusively contains positions. For this reason the format of the opening book is also referred to as a positional tree.

 

A positional tree offers the following advantages when studying openings:

 

For any random board position you receive an overview of all the moves which have been played including detailed statistics.

 

This concept allows the reliable recognition of move transpositions. Some users are irritated by the new version because various statistical information is displayed.

 

Here's an example:

 

 

1.e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+ 5. c3 Bc5 6. Be3 Bb6 7. Nf5

 

 

The diagram shows the various positional evaluations with ChessBase 9 and the current version of ChessBase.

 

What is the reason for these differences?

 

ChessBase always shows all the results and evaluations from the white side. This is the critical difference compared to previous versions. The diagram from the white side makes more sense when analysing a position with a chess engine.