Event: Division 2

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Opponent Rating Result
David Griffin 1454 0 - 1
Alex Grant 0 0 - 1
Philip N Mander 954 ½ - ½
Adam Greener 1393 0 - 1
Japhet Cashdan 1410 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

882 = (5211 + 400 * (1 - 3)) / 5)

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