On March 3, 2020, a new update was added to Dota 2, in which the Core and Support MMR were again combined and matchmaking system in ranked games was changed.
In their blog, the developers described in detail what was changed:
- The division of the rating on Core and Support was canceled. Now the system takes into account your level of play for each position for all five roles. Thanks to this innovation, the matchmaking system will be able to more accurately take into account the strength of players in different roles.
- Choosing your best roles, your full Dota 2 MMR will be taken into account. But when choosing a weaker role, the matchmaking system will place you in a lower MMR match. In the match you will see the rank that will be assigned to you by the system for this game.
- The system will determine the level of the game for a specific role by the ratio of losses and wins. If you lose, the additional rating will decrease, and if you win, increase accordingly. Starting role levels will be determined based on the results of your last 100 games on the Core / Support.
At the moment, you can find out your current level of roles in the Role Queue menu.