Event: Judd JTCC

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Opponent	Rating	Result
Emily Rimmer	0	1 - 0
Tommy Atkins	58	0 - 1
Osian Williams	0	0 - 1

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

-114 = (58 + 400 * (1 - 2)) / 3)