Event: Open County Championship

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Opponent Rating Result
Roy Hughes 2085 1 - 0
Andrew P Lewis 2283 ½ - ½
James Gardner 2023 0 - 1
Gerald Moore 2159 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2238 = (8550 + 400 * (2 - 1)) / 4)

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