What is the 24-point numbering system?
Modern backgammon books use the numbering system shown below for representing the movement of checkers. The points are numbered from the point of view of the player whose turn it is to play. So actually there are two sets of numbering, one for each player. Your one-point is your opponent’s 24-point, your five-point is your opponent’s 20-point, etc. While this might seem confusing at first, it quickly becomes natural.