Install crafty-books-small by entering the following commands in the terminal:
sudo apt update sudo apt install crafty-books-small
Description:
Small-size opening books for crafty chess engine
Opening books that crafty use to evaluate the position during the game. This is the small version, occupying 1MB and containing +4500 games computed until the 60th ply.
Version: 1.0.debian1-2
Section: multiverse/games