Event: Durham League Division B

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Opponent Rating Result
Jonathan Sams 1829 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1429 = (1829 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
John Marsden 1399 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

999 = (1399 + 400 * (0 - 1)) / 1)