Event: Hillingdon Div 1

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Opponent Rating Result
Nigel Colter 1772 ½ - ½
Barry DA Fraser 1459 ½ - ½
Daniel Evans 1705 0 - 1
Xiling Wang 1348 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1571 = (6284 + 400 * (1 - 1)) / 4)

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