Event: u1850 County Championship

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Opponent Rating Result
Stephen Livermore 1636 ½ - ½
Robert L Jones 1674 ½ - ½
Alan PH Norman 1708 ½ - ½
Ben Yelverton 1730 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1787 = (6748 + 400 * (1 - 0)) / 4)

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