20-09-2017, 09:23 PM
I'd honestly suggest keeping this stuff as simple as possible: F(activity, rating, eligibility) with as few discretionary constraints as possible and without getting too specific about activity or particular tournaments etc. Chess is an objective game, it comes with a reliable rating system - other than that, we just need to know that we can trust it due to a reasonable degree of pertinent activity (i.e. not out of date).
The KISS principle is a good one.
The KISS principle is a good one.