Event: Library Rapidplay January

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Opponent Rating Result
Tarryn Tinkler 0 0 - 1
George Butterworth 922 0 - 1
Xavier Woodgate 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

174 = (922 + 400 * (1 - 2)) / 3)

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