Event: North London League

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Opponent	Rating	Result
Avril Chloe Hsu	1458	1 - 0
Dylan Mcleish	0	1 - 0
Jacob Rose	0	0 - 1

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

619 = (1458 + 400 * (2 - 1)) / 3)