moved swagger back to json, dropped yamljs dependency (i got into this by switching between swagger frameworks a couple times... I generally prefer json to yaml, not sure how you feel)
I think this is fixed. You already committed the change to actually show the number of games played, rather than doing gamesPerMatch * numberOfMatches. I also had misnamed the parameter in the swagger docs as "matchesPerGame" which doesn't make sense... I reran your test case and got:
Addresses: