Manual de Houdini 3 2012 | Page 105

Reference

105

Import old book converts a book in the old (FBK) format and imports the contents.
Import games merges the games of a selected database into the tree, including
full statistics.
Learn from database adds the statistics from a selected database without actually
importing the moves into the tree.
Add priority analysis imports the variations of a specified database and marks the
moves as preferred tournament moves.
The program allocates “weights” to the individual lines of the book. These weights
control the probability with which the program will choose the move in a game. The
value can range between –125 to +125. The values are initially set to zero. The
weights are given in the “Engine” column in the book window.

Learning from a database
With this function the program learns from the experience of other players. It looks at
the games of a database and pretends it has played them itself. On the basis of the
results it changes the weights of individual variations.

Edit

Ope nings book

Le a rn from da t a ba se

displays a dialog box in which you can set a number of learning parameters.

Wins: Only won games are used, the program increases the weights of white
moves if White won and black moves if Black won.
Losses: Only losses are considered. If White lost, the white moves are reduced,
and if Black lost, the black moves are reduced.

© ChessBase 2012