Event: The Chess Centre - Horsforth (Class 1) Junior League

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Opponent	Rating	Result
Rohan Kirby	947	1 - 0
Emily Leung	766	1 - 0
Ed Wakeling	1037	0 - 1
Ed Wakeling	1136	1 - 0
Magnus Grange	567	1 - 0
Cora Wainwright	1152	1 - 0
Zachary Coggill	911	1 - 0

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

1217 = (6516 + 400 * (6 - 1)) / 7)