Event: Hillingdon Div 2

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Opponent Rating Result
Xavier Cowan 1880 ½ - ½
Ramin Tawab 1984 0 - 1
Alexander McKenna 1606 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1557 = (5470 + 400 * (0 - 2)) / 3)

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