Event: Division 5

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Opponent Rating Result
Daniel Peters 0 0 - 1
Alan Johnson 911 1 - 0
David Gretton 0 0 - 1
Poppy Dawson-Best 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

28 = (911 + 400 * (1 - 3)) / 4)

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