Event: SCL Div 3

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Opponent	Rating	Result
Gavin Stonham	0	½ - ½
Amanda Jones	0	1 - 0
David Kinsler	0	0 - 1
Sam J Murphy	0	0 - 1
Michael J White	0	½ - ½

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

-80 = (0 + 400 * (1 - 2)) / 5)