Event: Division 5

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Opponent Rating Result
Roger Coleman 70 0 - 1
Michael Keenan 70 1 - 0
David A Hallen 92 0 - 1
Lilly I Brown 55 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

72 = (287 + 400 * (2 - 2)) / 4)

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