Event: Ivan Gromov Online Schools Chess League

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Opponent	Rating	Result
Anixton Linton	1397	1 - 0
Oli Smith	0	0 - 1
Austin Measday	923	0 - 1

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

640 = (2320 + 400 * (1 - 2)) / 3)