Event: Yorkshire Blitz

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Opponent	Rating	Result
Charlie Wainwright	1785	0 - 1
Ethan Gaffney	1492	0 - 1
Adamjeet Singh	1372	0 - 1
Chun Hang Chan	0	0 - 1
Caelan Batty	1432	0 - 1
Nathaniel Mackenzie	1322	0 - 1
James Kennedy	1161	0 - 1
Simon Jones	1411	0 - 1
Diane Dickson	1082	0 - 1

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

829 = (11057 + 400 * (0 - 9)) / 9)