Event: Hillingdon Div 2

Opponent Rating Result
Robert Parsons 1769 1 - 0
John Clenshaw 1697 1 - 0
Daniel Evans 1673 1 - 0
Peter R Lord 1770 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1927 = (6909 + 400 * (3 - 1)) / 4)

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