Event: Richardson Cup

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Opponent Rating Result
Michael Howarth 0 1 - 0
Tim Humphries 1900 1 - 0
Tim Gollins 1939 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1680 = (3839 + 400 * (3 - 0)) / 3)

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