As the title suggests, how does Dota 2 calculate the MMR (Matchmaking Rating) after the implementation of the role queue?

I noticed that it is not a simple +25 or -25 MMR. I tracked my MMR and found out that both of my roles' MMR (support & core) changed after the game (in a party of 2 with both members selecting core role).


So the main MMR change will be for the selected role. Lets say you selected core role, and win, you'll get around +25 for this win on your core MMR. But your support MMR will also adjust somewhat, although to a much lesser degree.

The aim of this is to prevent people with great support skills from having a much lower core MMR (or vice versa), when many skills are transferable.

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  • I see. This makes sense, but do you know the factor of the MMR adjustments? It doesn't feel like the adjustments are consistent – The1993 Oct 24 '19 at 2:14

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