Well looking at the rules of Ludo on wikipedia, it says that a roll of a six earns a bonus roll. I did not see where it says in there that the bonus roll MUST be used with the same pieces that the original 6 was moved with, and in addition to that if the bonus roll can not be used, the original 6 is now void.
(hide) If you want to find an opponent with similar playing skills to your own look in the Ratings page of the type of game you want and find a player with a similar BKR. (pauloaguia) (show all tips)