Event: Hillingdon Div 3

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Opponent Rating Result
Gabriele Martellotta 1422 0 - 1
Ashley R Anderson 1100 1 - 0
Ashwin Balkrishna 1409 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1444 = (3931 + 400 * (2 - 1)) / 3)

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