The most complete glossary of backgammon terms
[Listed by Paul Magriel in his book Backgammon.] Six criteria for determining whether a situation requires a safe play or a bold play. They are: (a) opponent's home board strength; (b) presence of an anchor in opponent's home board; (c) your home board strength; (d) blots in opponent's home board; (e) number of checkers you have back; and (f) number of checkers opponent has back. Criteria (a) and (f) call for making a safe play; the others point towards making a bold play.
A backgammon variant in which one checker by itself controls a point (1). See: How to Play Blocking Backgammon.