Well, this challenge is over 9 months old, but I started it right now and found it very interesting.
It took me too long to see what's going on, but I finally see it.
I think I get all the inputs, but I can't get any idea about how extra points work.
I know you have some basic score, but under some circumstances I suddenly got 100+ points on a 6 turn play.
I still don't get how it works, because that should be one of these hidden states, and I can't see any way to identify it.
I saw that turns indeed affect other "players" behaviour, but I can't see if it affects these bonus scores. I searched for "bonus" on places where I thought I can find them, but nothing.