Backgammon is played for an agreed wager or
for a number of points if in tournament play.
During the course of the game, a player who
feels they have sufficient advantage over the other player
may propose doubling his stakes. This may be done only at
the start of their turn, and before rolling the die.
When a player is offered to double the wager
they can refuse but this means that the backgammon game
is won but the player making the offer and the original
stake must be payed to them.
The player accepts the doubling of the stakes
becomes owner of the doubling cube and only they may make
the next double with the cube.
Redoubles can be made up to 64 times the original