Event: Open County Championship

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Opponent Rating Result
Kevin J Williamson 1953 ½ - ½
Konrad Scheffler 0 1 - 0
Jeff R Dawson 2022 ½ - ½
Kevin J Williamson 1953 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1582 = (5928 + 400 * (1 - 0)) / 4)

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