Event: Durham League Division B

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Opponent	Rating	Result
Nathan Ekanem	1959	0 - 1
Daniel Williams	1605	1 - 0
AD Tony Shires	1586	1 - 0
Thomas Marwood	0	0 - 1
Bhavay Ahuja	0	0 - 1

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

950 = (5150 + 400 * (2 - 3)) / 5)