Event: WMA Spring League Division 2

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Opponent	Rating	Result
Nicholas Fallowfield	0	0 - 1
Amit Senthil-Kumar	0	1 - 0
Edwin Podolski	70	0 - 1
Dillan Duke	0	1 - 0
Sam Foster	0	0 - 1
Robert Marks	0	0 - 1
Nicholas Fallowfield	0	0 - 1
Amit Senthil-Kumar	0	1 - 0
Edwin Podolski	70	0 - 1
Dillan Duke	0	0 - 1
Sam Foster	0	1 - 0
Robert Marks	0	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-55 = (140 + 400 * (5 - 7)) / 12)