Event: Durham League Division B

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)

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