Event: St Mary's Qualifier

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Opponent	Rating	Result
Freddie Ogden	0	0 - 1
Jiatong Wu	1074	0 - 1
Ben Thompson	0	0 - 1

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

-42 = (1074 + 400 * (0 - 3)) / 3)