Event: EJCOA South Yorkshire U10

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Opponent	Rating	Result
Edward Alexander	577	1 - 0
Omar Moylayev	802	1 - 0
Yiwen Cao	624	1 - 0
Jack Holmes	973	1 - 0
Linda Cao	822	1 - 0

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

1160 = (3798 + 400 * (5 - 0)) / 5)