Event: Division 4

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Opponent Rating Result
Jonah Tomsett 74 0 - 1
Daniel McWilliams 114 0 - 1
Abhishek Badhe 83 0 - 1
Mark Turner 72 0 - 1
Steve M Thacker 104 0 - 1
Charles H Martin 102 0 - 1
Michael James 33 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-203 = (582 + 400 * (1 - 6)) / 7)

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