Event: 2nd Cornwall Online KO

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Opponent	Rating	Result
Chris Fegan	0	0 - 1
Pat Scully	0	1 - 0
Bryan Jones	0	1 - 0
Maria Evdokimova	0	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

200 = (0 + 400 * (3 - 1)) / 4)