Event: Hammersmith Rockhammer Cup

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Opponent	Rating	Result
Jack Chua	0	0 - 1
C Kenneth Kwabiah	1351	1 - 0
Leif Wong	1495	0 - 1

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

815 = (2846 + 400 * (1 - 2)) / 3)