Event: John Newsome Cup: Beginner to 1199

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Opponent	Rating	Result
Jenson Wright	0	1 - 0
Leo Stefanakis	1000	1 - 0
Oskar Denby	1171	1 - 0

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

1124 = (2171 + 400 * (3 - 0)) / 3)