Event: Tonbridge

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Opponent Rating Result
Karl Peters 1342 0 - 1
Roman Pavlov 1444 0 - 1
Mesum Khaja 1123 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1170 = (3909 + 400 * (1 - 2)) / 3)

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