Event: Hillingdon Div 1

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Opponent Rating Result
Sab Jhooti 1893 0 - 1
Hristo Colov 1859 0 - 1
Barry DA Fraser 1435 0 - 1
Robert Parsons 1694 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1420 = (6881 + 400 * (0 - 3)) / 4)

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