Event: Hillingdon Div 1

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Opponent Rating Result
Senthilnathan Yogit 2123 0 - 1
Miroslaw Walkusz 2103 1 - 0
Elmira Mirzoeva 0 ½ - ½
Martin Smith 2272 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1525 = (6498 + 400 * (1 - 2)) / 4)

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