Forced games and matchmaker?

The system predicts your odds of winning based on your team’s average SR.

The approximate formula based on the Elo rating system is (and I’m sorry if it looks terrible - these forums don’t have any mathematical typesetting available):

E(A) = 1/(1 + 10^(-D/832))

Where D is the difference between team A’s SR and team B’s SR. So D=SR(A)-SR(B). The 832 refers to how steeply the change in rating corresponds to a change in skill. The typical Elo system uses a value of 400, but by a statistical analysis of over 3000 competitive games, it appears Overwatch uses a value near 832.