Event: EJCOA South Yorkshire U8/U10

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Opponent	Rating	Result
Amandeep Singh	1028	0 - 1
Yichen Zheng	896	0 - 1
Kai Abdulla	685	1 - 0
Savannah Ashton	1010	0 - 1
Omar Moylayev	0	1 - 0

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

644 = (3619 + 400 * (2 - 3)) / 5)