Event: Division C

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Opponent Rating Result
Robert Tinton 125 1 - 0
Robert Tinton 125 1 - 0
Ben Fearnhead 115 0 - 1
Dave C Hartley 96 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

115 = (461 + 400 * (2 - 2)) / 4)

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