Event: Hillingdon Div 2

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Opponent Rating Result
Xavier Cowan 1890 0 - 1
Surjit S Dhemrait 1619 1 - 0
Alexander Horwood 1590 1 - 0
James Lyons 1627 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1882 = (6726 + 400 * (3 - 1)) / 4)

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