Event: Rated Friendlies

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Opponent Rating Result
Martin J Chadwick 1328 0 - 1
Nick Deakin 1275 0 - 1
Steven P Nixon 1477 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

960 = (4080 + 400 * (0 - 3)) / 3)

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