Event: Hillingdon Div 3

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Opponent Rating Result
John Clenshaw 1668 0 - 1
Gerry Stonehouse 1186 ½ - ½
Girish Chaudhary 1410 0 - 1
Ashley R Anderson 1084 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1037 = (5348 + 400 * (0 - 3)) / 4)

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