Event: Test

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Opponent Rating Result
Paul Brooks 165 0 - 1
Paul Brooks 165 0 - 1
David Twine 173 0 - 1
David Twine 173 0 - 1
Brian Medhurst 137 1 - 0
Michael H Stinton-Brownbridge 163 ½ - ½
Nick J Butland 151 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-68 = (1127 + 400 * (1 - 5)) / 7)

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