BensenseiAdvanced Study Room or asr is a teaching room on kgs which has an ongoing League system. To join simple go to the advanced study room on kgs under the Lessons category. One of the best thing about asr is that the stronger players almost always offer to review the game.
Another added bonus is the competition which is an added incentive to play go. At the end of the month scores are compared and the top players in each section move up. There are also various prizes awarded to players who did the best in their bracket as well as to the most outstanding players overall. for more info look at their website. (also if you are in gamma II bracket pm me username: dukedaniel I'd love to play you)