Event: Std Games

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Opponent	Rating	Result
Fredy Reber	1153	0 - 1
Robert Cronin	0	0 - 1
David Marsden	0	0 - 1

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

-16 = (1153 + 400 * (0 - 3)) / 3)