furbster: Looks like you have!  Perhaps there's a bit of a delay between you earning it and the system recognising it - maybe it checks once a day?

Wahey! I finally got this achievement.  Shame I was sitting on the bar at the time with the 6-point made :-( 

[I didn't think it counted if they were passes, but apparently it does.]

Are there any achievements yet to do with Stairs?  I don't have any ideas, just realised I haven't seen any.

How about a "Won the battles, but lost the war" achievement for winning all your games in a tournament, but still not winning overall?  This would apply to triple gammon tournaments only.