It can be done using an honour system, that is, if a game ends gammonly then the loser resigns the next game, or two for a backgammon. However an automatic system is definitely preferable.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)