Event: September Quickplay

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Opponent Rating Result
Joseph Machin 1407 0 - 1
Nick Tadd 1301 1 - 0
Andrew Austen 1556 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1555 = (4264 + 400 * (2 - 1)) / 3)

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