9 week league with week 10 finals. Players play 5 games per week in groups of 3 or 4 players. Winner of each group moves up a group while loser of each group moves down a group. After week 5 players decide into divisions. How many divisions depends upon number of players in the league. After week 8 groups are locked. After week 9 the top 50% of each division qualify for week 10 final.