Manual de Fritz 15 2015 | Page 101

Reference

101

The openings book is called the “tree” as the branching variations in the opening
resemble the structure of a tree. The files that make up a tree are pretty large. The
program requires about 80 bytes to store a position and all the information associated
with it. You can leave the files on the program CD. However, in this case, the program
will not be able to modify the book as it plays games (i.e., it cannot learn).
Thus, it is advisable to copy them to your hard disk.
Some things to note:
The size of the openings tree is limited only by the amount of disk space available.
It is important to note that access to the information is always extremely fast, even if
the files are truly gigantic.
Existing openings trees can be easily extended, simply by importing games. This
means that whenever a series of high quality games are available, the program can
read them and extend its openings knowledge.
The tree recognises all transpositions, even those that did not occur in the games
from which the tree was generated. Sometimes you may be able to switch from one
known position to another with a move that has never yet been played.
The tree can handle reversed colours perfectly. For instance after 1.d3 d5 2.d4,
the program is likely to reply 2...c5! and play the entire Queen’s Gambit as Black.
The openings tree is not just an instrument to make the program strong, it is also
a very powerful training tool for chess players. For this reason each move can be
marked with chess symbols like “!” and “+=“.
Note: If you are using Windows it is very important to keep all your databases and
openings books in the standard directory (My Documents\ChessBase) suggested by
the program. Otherwise the operating system will try to back up the giant files every
time you close the program.

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