Install gnubg-data by entering the following commands in the terminal:
sudo apt update sudo apt install gnubg-data
Description:
data files for GNU Backgammon
GNU Backgammon is a strong backgammon program (world-class with a bearoff database installed) usable either as an engine by other programs or as a standalone backgammon game. In addition to supporting simple play, it also has extensive analysis features, a tutor mode, adjustable difficulty, and support for exporting annotated games. . This package contains the data files needed by GNU Backgammon (textures sounds, locale information, neural network weights, and so forth).
Homepage: http://www.gnubg.org/
Version: 1.06.001-1build1
Section: universe/games