Event: Division 3

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Opponent Rating Result
Robert W Counsell 1721 0 - 1
Andrew S Reid 1768 1 - 0
Paul W O'Brien 1698 1 - 0
Edward Upsdell 1619 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1902 = (6806 + 400 * (3 - 1)) / 4)

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