Backgammon
Move all fifteen of your blue checkers around the board into your home and bear them off before the computer does. Hit lone checkers, build points and block the way.
How to play Backgammon
How to play
Each turn you roll two dice and move your blue checkers counter-clockwise towards your home in the bottom right. Tap a checker and then a marked point, or drag it. Doubles are played four times. To play a friend on one device, choose Two players: Blue and Gold share the dice, and the board turns to face whoever is to move.
Hitting and the bar
A single checker on a point is a blot. Landing on a computer blot sends it to the bar, and the same can happen to yours. A checker on the bar must come back in on the computer's home board before anything else moves.
Using the dice
You must use both dice if you can. If only one can be played, you must play the larger one when possible. Points with two or more computer checkers are blocked. Only legal destinations are marked.
Bearing off and scoring
Once all your checkers are in your home board, bear them off with exact rolls, or with a higher roll from your furthest checker. Win before the computer bears off any checker for a gammon, and while it still has a checker on the bar or in your home for a backgammon.
Questions
Are the dice fair?
Yes. Every roll comes from a seeded random number stream that is fixed when the game starts, so a saved game resumes with exactly the same dice. The computer never sees future rolls; it only considers what the dice might do.
What is a gammon and a backgammon?
If you bear off all your checkers before the computer has borne off any, you win a gammon, worth two points. If the computer also still has a checker on the bar or in your home board, it is a backgammon, worth three points.
Is there a doubling cube?
No. Each game is played as a single game, and the result shows whether it was a single game, a gammon or a backgammon.
How strong is the computer?
Easy plays quick and loose and sometimes makes random moves. Medium judges each move by safety, points made and the race. Hard also looks at all 21 rolls you could answer with, and how you would best play each, before it chooses.
Can I take back a move?
Yes. Undo takes back the last checker you moved, or your whole previous turn together with the computer's reply. You keep the same dice for that turn, but the rolls after it stay fresh.