ThunderGr: doesn't rating position/ rating suffer from the same problem.? Today i qualify but lose a game and tomorrow i don't. It doesn't seem that hard to figure out if i am in the top 10% in a game at any point, look at the number of people with ratings and divide by 10. Seems a lot off work for the organiser though because he has dcide who qualifies manually, but if he wants to do it that's his business.