Event: Hillingdon Div 2

Opponent Rating Result
Simon Healeas 1850 0 - 1
Clive Heidrich 1785 0 - 1
Edward Poynton 1539 1 - 0
Daniel Evans 1735 0 - 1
Edward Poynton 1533 1 - 0
Daniel Evans 1693 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1556 = (10135 + 400 * (2 - 4)) / 6)

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