Event: Durham League Division B

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Opponent	Rating	Result
Bhavay Ahuja	0	0 - 1
Jason Robson	1445	0 - 1
Michael Siddle	1512	1 - 0

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

852 = (2957 + 400 * (1 - 2)) / 3)