Event: Open County Championship

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Opponent Rating Result
Nick Collacott 2020 1 - 0
Timothy Lunn 2060 0 - 1
Paul R Kemp 1994 1 - 0
Kevin J Williamson 1953 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2107 = (8027 + 400 * (2 - 1)) / 4)

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