Event: Reigate

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Opponent Rating Result
Jack Preece 0 1 - 0
Joel Griffiths 724 1 - 0
Taiyan Lu 1016 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

713 = (1740 + 400 * (2 - 1)) / 3)

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