The most complete glossary of backgammon terms
A neural-net computer program that plays backgammon (1) and analyzes positions and matches. GNU Backgammon is a cooperative effort of many volunteers. It is "free" software as defined by the GNU General Public License. See the post by Gary Wong and the tutorial by Albert Silver. Website: GNU Backgammon.
A guideline for cube handling in pure race positions. You should double if the opponent's pip count exceeds yours by 8% or more, and redouble if it exceeds yours by 9% or more. Your opponent should accept the double if his pip count exceeds yours by no more than 12%.