Event: SCCU County Championship: u1450

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Opponent	Rating	Result
Nigel White	1413	0 - 1
Omar Selim	1435	0 - 1
Phil McKenna	1440	1 - 0
Grace Wilde	1333	0 - 1
John Miraghaie	1393	1 - 0

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

1323 = (7014 + 400 * (2 - 3)) / 5)