Event: Hillingdon Div 2

Opponent Rating Result
Trevor Bates 1568 1 - 0
David A Stott 1472 1 - 0
David Websdale 1434 0 - 1
Ravi Ravaendhran 1217 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1623 = (5691 + 400 * (3 - 1)) / 4)

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