Backgammon Rules
Backgammon is a game for two players played on a Backgammon Board
The object of the game is to move stones around the board into the home table an subsequently remove them from the board (known as bearing off)
The backgammon board is divided into two tables with six triangular points of alternate colour at each end. The twelve triangular points nearest a player comprise the players Outer and Home Table and the dividing line between these is known as the 'bar'. 
At the start of the game the stones are laid out with each player choosing one set of stones, red or white.
The game commences by each player throwing a single die with the highest score going first. The thrower with the higher number may either adopt the points shown by the two dice as his own throw or re-throw both of his own dice.
The movement of the stones of each player is from the ace point in his opponent's home table towards the like point in his own home table. The numbers on the dice are counted seperately.
Thus a throw of a six and three would entitle the player to move one stone six points and then the same or another stone three points. In the event of throwing a double the player is entitled to play the throw twice
Thus if a double five is thrown either four stones can be moved five spaces, two may be moved five spaces and one ten spaces (two lots of five) or one may be moved twenty spaces (four lots of five)
The right to move is subject to a certain qualification.i.e that if a stone can only be placed on a point which is either vacant or occupied by one or more of his own stones or by only one of his opponent stones.
A single stone on a point is known as a 'blot' and is vunerable to attack. If a player lands on a point occupied by only one of his opponent's stones the 'blot' is removed and placed on the bar and his stone replaces it on the point. The stone removed to the 'bar' must recommence play from the players home table
A player must re-enter all his stones from the 'bar' before he is permitted to move any other stone on the playing board. A player cannot re-enter a stone from the 'bar' onto his opponents home table until he makes a throw which corresponds to a vacant point on an opponents 'blot', commencing the count from the first point in the home table of his opponent.
If all the points in his opponent's home table are occupied by two or more stones then his play is completely suspended until one or more of the points become available. Any part of a throw which cannot be played is lost to the thrower, but each player is compelled to play the whole of his throw if it is possible to do so.
Bearing Off
This is the process of removing a player's stones from his home table and may only take place once all 15 stones have reached the home table
To bear off a number must be thrown which carries a stone at least one move further that his ace point. If the dice throw permits a player must bear off more than one stone in a turn.
Scoring
At the start of the game, a stake for which the game is being played may be agreed. During the game this stake may be doubled by either player. Once a player has made the first double the right to double alternates between players prior to each one throwing their dice. Normally no more than four or five doubles of the stake are made in the game.
When a double is made by his opponent, a player has the right to end the game and forfeit his stake rather then to continue to play on doubled points. To record this doubling, the doubling cube, marked with the numbers 2 to 64 is rotated so that the upper face shows what multiple of the original stake is being played for.
If a player succeeds before his opponent has removed a single stone, he wins a 'gammon' which doubles the existing points. If a player can bear off all his stones whilst his opponent still has a stone or stones in the 'winners home table' he wins a ' backgammon ' or triple the existing points.
The winner is the first one to bear off all his stones