Update:
After launching Elo-MMR, we got feedback from a lot of users about the sudden increase in ratings of new users, particularly in their first couple of contests. This was supposed to be a feature, but it had been a bit too much. So now, we have introduced a change, in which the weight of the first and second contests of a new user is changed to 60% and 80% of their old values, respectively. This leads to a slower increase in ratings of new users.
Along with Provisional Ratings, we hope this leads to a more robust rating eco-system.
This change has been applied for all users and their Elo-MMR rating recalculated from the beginning of time, and hence most users will see a change in their display ratings.
A comparison between the previous and current ratings (display ratings):
- 31 users have an increase of more than 50
- ~11700 users have an increase of between 0 and 50
- ~465000 users have no change
- 160 users have a decrease of more than 100 (70 of whom have been caught in cheating)
- ~4000 users have a decrease of between 50 and 100
- ~32000 users have a decrease of between 0 and 50.
You can find the entire list of users with their rating changes here.