Event: Ivan Gromov Online Schools Chess League

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Opponent	Rating	Result
Joshua Doyle	1520	0 - 1
Minh Vu	0	0 - 1
Oli Smith	0	1 - 0
Gautham Ravisankar	1407	0 - 1
Jaideep C Cheema	1400	0 - 1
Daniel Francis	1329	1 - 0
Isaac Lam	1508	0 - 1
Rajas Nanda	1475	0 - 1
Daniel Francis	1277	0 - 1

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

880 = (9916 + 400 * (2 - 7)) / 9)