Event: Winter Online

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Opponent Rating Result
Richard Nurse 1700 0 - 1
Richard Nurse 1700 0 - 1
Sam Hedge 1700 1 - 0
Sam Hedge 1700 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1500 = (6800 + 400 * (1 - 3)) / 4)

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