Event: Derby & District Division 1

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Opponent Rating Result
Brian Lever 1536 ½ - ½
Tim Humphries 1850 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1893 = (3386 + 400 * (1 - 0)) / 2)

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Opponent Rating Result
Alex Webster 1886 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1486 = (1886 + 400 * (0 - 1)) / 1)