Event: Open County Championship

Opponent Rating Result
James Pack 1897 ½ - ½
Jose Pedro Vieira 1879 ½ - ½
Paul F Habershon 1978 ½ - ½
Stephen Lewis 1896 ½ - ½
Paul McMahon 1918 1 - 0
Kevin J Williamson 1881 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2042 = (11449 + 400 * (2 - 0)) / 6)

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