Event: Cambs Division 2

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Opponent Rating Result
Ben Tarlow 1818 ½ - ½
Dave J Hurricks 1713 0 - 1
Peter N Walker 1960 1 - 0
Ben Tarlow 1818 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1927 = (7309 + 400 * (2 - 1)) / 4)

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