Event: BACC OTB

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Opponent	Rating	Result
Mark Edmundson	0	0 - 1
Deborah Edmundson	0
Andy Hardy	0
Hamish Mackenzie	0	0 - 1
Lynsey Manifold	0
Jamie Clynes	0
Ethan Cook	0
Valerie Crosby	0
Mark Edmundson	0
Deborah Edmundson	0
Andy Hardy	0	0 - 1
Hamish Mackenzie	0
Lynsey Manifold	0
Jamie Clynes	0
Ethan Cook	0
Valerie Crosby	0

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

-400 = (0 + 400 * (0 - 3)) / 3)