Event: 23 / 24 Club Championship

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Opponent	Rating	Result
Jack Erskine-Pereira	1976	0 - 1
Steve Armstrong	1456	0 - 1
Andrew Brown	1350	0 - 1
Alex Piercy	1553	0 - 1
Aaron Cheung	1314	0 - 1
Jonathan Rooney	1507	0 - 1
Alykhan Bandali	1459	1 - 0

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

1231 = (10615 + 400 * (1 - 6)) / 7)