Division

' has a number of different divisions''' players can reach according to their league rating.

Sub-divisions
Rookie 0 is the tutorial division. All players are automatically placed in Rookie 1 after completing or skipping the tutorial.

Milestone rewards are earned upon reaching a new division for the first time and are reset weekly.

Reset
The weekly reset for leagues is Sunday at midnight GMT (7:00 PM EST).

Weekly decay
A player's league rating is reduced, or decays, every week. The amount of decay is calculated by rounding the rating down to the player's current division, subtracting 1000, and dividing by two. Higher divisions decay more than lower ones.

Some examples:
 * For a player in the Pro division with a rating of 1720: Rounding down to the current division results in 1700, subtracting 1000 results in 700, and 700 divided by 2 is 350. 1700 minus 350 is 1350, leaving the player in Amateur 3.
 * For a player in the Amateur 2 with a rating of 1250: Rounding down results in the same 1250, subtracting 1000 results in 250, and 250 divided by 2 is 125. 1250 minus 125 is 1125, leaving the player in Rookie 3.

Decay only happens once between play sessions, so if a player doesn't play for a month, this decays only happens once.

When decay happens after a reset, a player must play at least one match in the new division to gather that division's rewards.