Event: Summer cup 24

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Opponent	Rating	Result
George Cooper	1000	1 - 0
Siyon Sujeeth	950	0 - 1
David Hooper	1177	0 - 1

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

909 = (3127 + 400 * (1 - 2)) / 3)