Event: Division 2

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Opponent Rating Result
Jeffrey Page 1644 1 - 0
Jonathan P Marrow 1853 ½ - ½
Gabriel J Barr 1849 0 - 1
Paul R Barclay 1804 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1688 = (7150 + 400 * (1 - 2)) / 4)

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