Event: Wirksworth Club Championship

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Opponent Rating Result
David Hall 0
Sam Reed 0
Jack Austin 0
John M Potter 0
Alex Webster 0
Jack Caulton 0
Rick Graham 0
Javi Martinez 0 0 - 1
David Hall 0
Sam Reed 0
Jack Austin 0
John M Potter 0
Alex Webster 0
Jack Caulton 0
Rick Graham 0
Javi Martinez 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 1)) / 1)

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