Event: EJCOA South Yorkshire U10

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Opponent	Rating	Result
William Hart	921	0 - 1
Viktor Mairesse	0	1 - 0
Emerys Hillman	1010	1 - 0
Roshni Richard	0	1 - 0
Omar Moylayev	802	1 - 0

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

787 = (2733 + 400 * (4 - 1)) / 5)