Event: Open County Championship

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Opponent Rating Result
Robert R Sanders 1936 1 - 0
Paul F Habershon 1978 ½ - ½
Roy Hughes 2008 0 - 1
Stephen Lewis 1896 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1955 = (7818 + 400 * (1 - 1)) / 4)

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