Event: Division 2

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Opponent Rating Result
Robert Ashworth 154 1 - 0
Phil Markham 148 0 - 0
Patrick Baker 142 1 - 0
John S Burrows 117 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

538 = (413 + 400 * (3 - 0)) / 3)

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