Event: EJCOA South Yorkshire U16/U14/U12

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Opponent	Rating	Result
Vihaan Singla	806	1 - 0
Xiaorui Wang	1245	0 - 1
Benjamin Layton	1006	0 - 1
Ethan Yan	1179	1 - 0
Evan Shkul	1289	1 - 0

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

1185 = (5525 + 400 * (3 - 2)) / 5)