Event: Durham League Division 1

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Opponent	Rating	Result
AD Tony Shires	0	1 - 0
Ben Snodgrass	0	1 - 0
Jonathan Sams	0	0 - 1

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

133 = (0 + 400 * (2 - 1)) / 3)