Event: Division 3

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Opponent Rating Result
John Harvey 1337 0 - 1
Martyn Colebrook 1508 0 - 1
Jon Pascoe 1300 0 - 1
John Broadwater 1400 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1186 = (5545 + 400 * (1 - 3)) / 4)

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