I've googled this question, and there are lots of answers; unfortunately the answers are all conflicting. Some say:
- You only have one MMR, used by both ranked and unranked, but only ranked affects it.
- You only have one MMR, used by both ranked and unranked, and both affect it, but you won't lose ladder points with unranked.
- Your ranked and unranked MMRs are entirely separate, though if one of your MMRs is not established, the system will use the other MMR to start, but after playing a while they will differ.
Does anyone have an answer, with some sort of proof to back it up, like an official note from Blizzard?
I want the answer to be 3, because I would like to offrace as Protoss. However, I'm only about silver at protoss, and after facing (and losing to) ten consecutive platinum opponents, it doesn't look like my unranked MMR is going down at all.