Event: D&DCL Div 3

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Opponent	Rating	Result
Dudley Thorpe	75	0 - 1
Sam Skinner	0	1 - 0
Kevin Woodbridge	115	0 - 1

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

-70 = (190 + 400 * (1 - 2)) / 3)