Event: Derby & District Division 3

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Opponent Rating Result
Joe Parker 1499 0 - 1
Matthew Caswell 1636 1 - 0
Tony O'Donovan 1347 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1627 = (4482 + 400 * (2 - 1)) / 3)

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