Event: Winter Online

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Opponent Rating Result
Tom Tomkins 1645 0 - 1
Tom Tomkins 1645 0 - 1
Edwin Cooke 1540 1 - 0
Edwin Cooke 1540 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1593 = (6370 + 400 * (2 - 2)) / 4)

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