Event: 480 Max

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Opponent Rating Result
Derek Green 125 1 - 0
Tony Preece 127 0 - 1
Derek Green 125 1 - 0
Tony Preece 127 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

126 = (504 + 400 * (2 - 2)) / 4)

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