Event: Summer League Division 2

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Opponent Rating Result
Brendan Stoneham 1373 0 - 1
Andrew Allen 1850 1 - 0
George Swanson 1661 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1495 = (4884 + 400 * (1 - 2)) / 3)

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