Event: Hillingdon Div 2

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Opponent Rating Result
Clive Heidrich 1798 0 - 1
Jason Obihara 1765 0 - 1
Matthew Georgiou 1903 0 - 1
Phil S Humphry 1277 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1486 = (6743 + 400 * (1 - 3)) / 4)

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