Event: Hillingdon Div X

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Opponent Rating Result
Finian Pearce 823 0 - 1
Xiling Wang 1184 0 - 1
Harriet Cann 527 1 - 0
Prabhgun Kapoor 843 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

844 = (3377 + 400 * (2 - 2)) / 4)

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