Event: Division 2

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Opponent Rating Result
Rahul Ghose 1929 0 - 1
Benjamin K Simpson 1915 0 - 1
Peter W Rose 1840 1 - 0
Barry N Green 1951 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1709 = (7635 + 400 * (1 - 3)) / 4)

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