A player who is offered a double is allowed to refuse, in which case he concedes the current game within a match and lose the current number of points. Otherwise, h e must accept the double and play on for the new higher stakes. A player who accepts a double becomes the owner of the cube and only he may make the next double.
Subsequent doubles in the same game are called redoubles. If a player refuses a redouble, he must pay the number of points that were at stake prior to the redouble. Otherwise, he becomes the new owner of the cube and the game continues at twice the previous stakes. There is no limit to the number of redoubles in a game.
To allow yourself the opportunity to double even when no legal moves are available, select the preference option called 'No auto-rolls'. This will have to be done at least 1 move prior to doubling. Using this option will result in confirming all moves -- even those where no legal moves are available.
Doubling Cube FAQ
Question #1 2pt Match, if I'm losing the game (and the cube has not been doubled) and my opponent offers to double the cube and I refuse, do I lose the entire Match or is there another game or games played till the point equals 2?
Answer #1 When you refuse the double here, you are only losing 1 point - same match continues [with the start of a game] with the score 1-0 in favor of your opponent
Doubling Cube FAQ
Matches versus Point-Games
In standard backgammon match play, games are not played for a fee per-point. All matches are played for a fixed number of points: from 1 point to 15 points. Matches can consist of 1 or more games.
Winning a single game (even with Gammon or Backgammon) does not guarantee a win in a match - it just adds to the winner the points that count towards the current match. E.g., winning the 1st game with a Gammon in a 5pt match with the final doubling cube at 2, adds 2 * 2 = 4 points to the winner, making the total score in the match 4:0. At this point, however, the match is still not won -- 5pt. are needed for a win.
Using doubling cube in multi-point matches is done for a different reason than in per-point play: using the cube raises point-stakes for a game in progress within a match.