The program's opening books were previously managed as a position tree. This concept is still integrated and is also supported by the current program version. The position tree (opening book) of ChessBase is a database that only contains positions. For this reason, the format of the opening book is also referred to as a position tree.

 

These position trees offer a number of advantages for studying an opening. For any board position you receive an overview of all the moves played, including meaningful statistics. All move changes are reliably recognized with this concept.

 

A new concept in this program version is the option for the user to use common game databases as opening databases. The current program version thus takes into account the fact that many ChessBase/Fritz users manage their repertoires in variation trees.

 

If you want to use these repertoires, it becomes technical and the opening books have to be converted at great expense. On today's powerful computers this has become somewhat outdated.

 

There are several ways to use the game databases as opening books.

 

Menu File - Open - Book from database

 

 

In the file selection dialog, navigate to the target directory and select the desired database.

 

 

This works not only with the new 2CBH format, but with all other supported database formats.The conversion is carried out quickly and the book is displayed in the form of a notation with the surrounding variants.

 

 

Alternatively, you can close the database used under Opening Book in the notation window and then select a new database.

 

 

With Fritz 19 you play directly against databases. This can be your own repertoire or you can use an opening article from the ChessBase magazine. In combination with the different player personalities, this opens up a fantastic training method, because you can also load these books at any time in " Play " mode.

 

If the White player, the Black player, the tournament title or the source of a game in the database starts with "White" or "Black" or with "White" or "Black", then all moves of this game are considered to belong to this color. Fritz will then only play these moves. A repertoire is always rather narrow from the point of view of your own color and broad for the opponent's moves.

 

Example: A game contains the moves 1.e4 e5 and as a variation 1... c5. It is marked as "White". Then Fritz will play 1.e4 with this database, but not necessarily 1.e4 e5 or 1.e4 c5 with Black. A "White" game has no influence on the Black repertoire. Other games marked "Black" would take care of that.

 

In principle, you can load any database as a book. However, this only really makes sense up to around 1000-2000 games; generating larger databases takes some time and you may have to cancel the loading process.

 

Database books show a notation for the current book position with the surrounding variants. Click on the convolution symbols on the right-hand side or in front of the variant nodes to get an overview.

 

The information bar below the tabs shows the playing preferences, the number of positions matching the current board position and the total number of available positions.

 

 

Tip for ChessBase users: Save a generated opening overview ("Survey") from ChessBase and play against it immediately.

 

Tip: The opening books of the opponent types are in the Fritz19 book directory. You can simply add variations if they play too narrowly. The fastest and best way to do this is with our database program ChessBase.