Event: Reigate

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Opponent Rating Result
Rupert Marsden 1813 0 - 1
Matthew Chatfield 1408 0 - 1
Zachary Naylor-Vane 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

940 = (3221 + 400 * (1 - 2)) / 3)

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