Event: Eton Rapidplay 2019

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Opponent	Rating	Result
Aaryan Singh	107	½ - ½
Alfie Onslow	190	0 - 1
Max Ma	136	0 - 1

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

-122 = (433 + 400 * (0 - 2)) / 3)