4 leaderboards with 4 different buy-in levels

Different points are awarded according to the table size:

Monthly Leaderboard

Example:
Player A has played 70 tournaments (all 9 handed in this example): his/her best block of 10 tournaments in a row goes towards the leaderboard. Finishing position from tournaments 45 to 54 is 2nd/7th/1st/5th/4th/3rd/7th/9th/1st/8th gives 150 points towards the 10 leaderboard. If finishing position in tournament 55 is:

a) 1st place, score will be increased by 20 points, as this improves series of 10 in a row (50 points for 1st place instead of 30 points for 2nd place)
b) 5th place, score will stay the same, as series of 10 in row is not improved. 

Overview

Name:  Sit&Go Challenge
Room:  Betsson
Date:  Every month (starting the first day of the month at 00:00 GMT and finishing  the last day of the month at 23:59 GMT)