Ken Larsen’s web site - Backgammon notation
Gammonlab and most modern backgammon books use standard “backgammon notation” to document moves. This notation denotes the points of a backgammon board as being numbered 1-24 with the bar being point 25 or “bar” and bearing off as “off” or point 0. The numbers are always from the perspective of the owner of the checkers. For example, white’s 1 point is red’s 24 point and vice versa.
Details of backgammon notation are best explained by citing several examples:
8/5 means move a checker from point 8 to point 5.
8/5* is the same as 8/5 except that a blot is hit. The asterisk (*) denotes the hit.
8/5, 6/5 means move one checker from 8 to 5 and another checker from 6 to 5. Note: Gammonlab omits the comma.
18/15(2) means move two checkers from point 18 to point 15.
18/15(3) means move three checkers from point 18 to point 15.
18/15(4) means move four checkers from point 18 to point 15.
24/18*/13 means move a checker from point 24 to 13. In making this move the blot on 18 is hit.
20/18/16*/14* means move a checker from 20 to 14. Along the way blots on points 16 and 14 are hit.
6/off or 6/0 means bear off a checker from the 6 point.
Bar/22 means move a checker from the bar to point 22.