Event: Grand Prix 2020 T4 Major

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Opponent	Rating	Result
Alexander Royle	1460	0 - 1
Angelica Rowe	1350	0 - 1
Joe Birks	0	0 - 1
Suhrith Yerabati	1268	1 - 0
Abeer Gogia	1461	0 - 1

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

868 = (5539 + 400 * (1 - 4)) / 5)