Event: SCL Div 3

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Opponent	Rating	Result
Paul J Waddingham	0	½ - ½
Stephen Gow	0	0 - 1
Graham Stuart	0	½ - ½
Timothy J Chapman	0	½ - ½
David R Agostinelli	0	½ - ½

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

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