Hrqls: I'd make a separate achievement for forcing your opponent to pass 40 times a row in Hyper. ;-) And not count Cloning (40 passes in a row in Cloning Backgammon happens far more frequently than in other types).
Which leads to an interesting question. What's the maximum forced passes in a row you can have in Hyper Backgammon? Or in any other variant with a fixed number of stones? (It clear there's no upper limit in Cloning).
(hide) In the mood for a quick game that is guaranteed to finish within 2 hours? Create a new game of your preference, select the Time for game and set Time to 0 days / 1 hour, Bonus to 0 days / 0 hours and Limit to 0 days / 1 hours. (TeamBundy) (show all tips)