Six masks apiece. One is worth nothing at all — and everything.
Nobody sees this but you.
Six of your fifteen tokens go under the masks. One must be the masque — worth ∅. The other five take a value from 1 to 6 and must total exactly 12. The nine tokens left over are your purse.
One of the eight spaces worth more than 1 that is not the centre 6. Both squares are turned over after thirty-six turns, and either counts for either colour — so this is a square you must also keep their masque off.