Event: Division Two

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Opponent Rating Result
Maxim W Dunn 156 0 - 1
Anthony Bolchover 1820 1 - 0
Mark Winterbotham 1904 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1160 = (3880 + 400 * (1 - 2)) / 3)

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