An optional rule in Single Mode (money play)whereby when a player is doubled, he may immediately redouble (beaver) while retaining possession of the doubling cube. The original doubler has the option of accepting or refusing as with a normal double.

The object of the game is for each player to bring all his checkers into his home board, and then to bear them off the board. The first player to clear all his checkers off the board is the winner.

A point occupied by a single checker of either color is called a blot. If an opposing checker lands on a blot, the blot is hit and placed on the bar. Anytime a player has one or more checkers on the bar, his first obligation is to enter that checker(s) into the opposing home board. A checker is entered by moving it to an open point corresponding to one of the numbers on the rolled dice. For example, if a player rolls 4 and 6, he may enter a checker onto either the opponents' four point or six point, as long as the prospective point is not occupied by two or more of his opponents' checkers. If neither of the points is open, the player loses his turn. If a player is able to enter some but not all of his checkers, he must enter as many as he can and then forfeit the remainder of his turn. After the last of a players' checkers have been entered, any unused numbers on the dice must be played.

Once a player has moved all of his fifteen checkers into his home board, he can begin bearing off. A player bears off a checker by rolling a number that corresponds to the point on which the checker resides, and then removing that stone from the board. If there is no checker on the point indicated by the roll, the player must make a legal move using a checker on a higher-numbered point. If there are no checker on the higher-numbered points, the player can remove a stone from the next highest point. A player is under no obligation to bear off if he can make an otherwise legal move. A player must have all of his active checkers in his home board to bear off. If a checker is hit during the bear-off process, the player must bring that checker back to his home board before continuing to bear off.

At the end of the game, if the losing player has borne off at least one checker, he loses only the value showing on the doubling cube (the original wager or one point if there have been no doubles). However, if the loser has not borne off any of his checkers, he is gammoned and loses twice the value of the doubling cube. Moreover, if the loser has not borne off any of his checkers and still has a checker on the bar or in the winners' home board, he is backgammoned and loses three times the value of the doubling cube.

Single Game (Money) Commission is taken from the final win sum (the winner pays for both players) Up to $20: 4.9% Example: Joe and Alex play a single game with initial stake of $5.

Alex wins by gammon. $9.02 will be added to Alex's balance and Joe's balance will have $10 deducted (commission is $0.49).

$20 up to $100: 3.9% Over $100: 2.9% Series Game (Match) Commission is taken from the stake sum plus 0.5% for each additional point in a game over 1 (the winner pays both).

Up to $20: base commission (for 1 point): 4.9%, every point: +0.5%, max commission: 9.9%

Example: Diane and Julia play a Series (match) up to 3 points with stake of $10.

Diane wins the series 3-1.The commission for 3 points is a base commission of 4.9%+2*0.5%=5.9% The commission from each player is $10*5.9%= $0.59 (the winner pays both their commissions).$8.82will be added to Diane's balance and Julia's balance will be deducted $10. $20 up to $100: base commission (for 1 point): 4.4%, every point: +0.5%, max commission: 8.9% $100 and over: base commission (for 1 point): 3.9%, every point: +0.5%, max commission: 7.9% We encourage matches between 2 players with a similar rating level, therefore: A maximum $5 commission when both rating of the players are over 1650.

Decrease of 50% in commissions if the rating of both players are over 1700. Increase of 15% in commissions if the rating of one of the players is less than 1600.

And: Increase of 50% in commissions when the rating difference is 100 to 199.

Increase of 100% in commissions when the rating difference is 200 or more. Increase of 150% in commissions when the rating difference is 250 or more. Increase of 200% in commissions when the rating difference is 300 or more. The last 4 rules apply: -Increased commission will not be applied if both players have a rating higher than 1650 or less than 1550. -A rating lower than 1400 is considered as 1400 and displayed as 1400*.

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