Event: Wilson's Chess Academy

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Opponent	Rating	Result
Vinay Keshav	66	1 - 0
Sivan Arunan	90	0 - 1
Hongyu An	92	0 - 1

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

-51 = (248 + 400 * (1 - 2)) / 3)