Event: Online League Season 3, Division 1

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Opponent	Rating	Result
Geoffrey D Brown	1746	1 - 0
Rosie Irwin	1057	1 - 0
Stephen K Lee	0	0 - 1
Anthony Perry	1588	1 - 0
Craig Chatterton	1647	1 - 0
Neil Todd	1893	1 - 0
Daniel Gottschalk	1685	1 - 0
Andrew Birtwhistle	1893	½ - ½

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

1689 = (11509 + 400 * (6 - 1)) / 8)