Binary package “gnubg” in ubuntu oneiric

graphical or console backgammon program with analysis

 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. It can be played
 either from a GTK+ graphical interface, optionally with a 3D board, or
 from a simple text console.
 GNU Backgammon is still under initial development and should be
 considered beta software.