Event: SCL Div 5

Opponent Rating Result
James Gray 1229 0 - 1
Steve R Dunleavy 1009 1 - 0
Geoff Parish 1112 0 - 1
Daniel Andrei Aron 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

638 = (3350 + 400 * (1 - 3)) / 4)

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