Event: Durham League Division B

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Opponent Rating Result
Raj Singh 0 0 - 1
Chris Swales 1604 0 - 1
Geoff Raw 1376 1 - 0
Ollie Walton 900 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

970 = (3880 + 400 * (2 - 2)) / 4)

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