What does it take to enter the masters league?

[=) Random Task (=]

being #1 in the division doesn't say anything about your hidden skill rating. it is just a sign that you are playing many games. you need to consistently win against gifted players - i never had a 15 games win streak so less will be sufficient as well. you get matched against stronger and stronger gifted players and then against masters. once you win a few games in a row against masters your promotion is imminent and will happen eventually. a promotion can happen regardless if the last game before the promotion is won or lost. you just have to climb with your hidden skill rating above the threshold level.