In order to get on the rating leaderboard you must:
- have played at least 30 rated games in a given rating,
- have played a rated game within the last week for this rating,
- have a rating deviation lower than 75, in standard chess, and lower than 65 in variants,
- be in the top 10 in this rating.
The 2nd requirement is so that players who no longer use their accounts stop populating leaderboards.