Event: Club Championship B Division

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Opponent Rating Result
George Butterworth 1131 0 - 1
Daniel Ayre 1607 1 - 0
Zhuoyi Lin 1143 0 - 1
Matthew Rowett 1215
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1160 = (3881 + 400 * (1 - 2)) / 3)

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