For your rating you start with 1'500 points. Plus or minus points are distributed for each game won or lost. The number of points to be awarded is calculated by the GotCourts League rating level difference of the opposing players. If you play against an opponent ranked higher in the GotCourts rating, you can win extra points. If you lose, your loss of points is much smaller, corresponding to the increased probability of losing. Conversely, a win against a lower-ranked player results in fewer points than are deducted for a loss against that player. You can find more information in the GotCourts League regulations on gotcourts-league.com in the FAQ menu.