A Cosmo tournament is 3 rounds at 10 minutes a round. You can qualify for fourth round by earning a certain amount of points which has been typically 20,000 points which could replace your lowest score. In my experience, I've never seen a winner win without playing 4th round. My buddy came in second place in the last tournament and the 1st place have beat him by several hundred points and his score was around 245k, if memory serves.