I'm new to this game, and have been enjoying a few games against the computer and my Mum over the network.
However, I've now discovered there's no such thing as a "risky" word (at least with my setup) as ANY combination from my rack seems to be accepted when playing against the computer. (So I can get the 7-letter 50 bonus every turn.)
That's not much of a challenge! Am I missing something?? (My Mum has the same experience on her new laptop.)