Event: Open County Championship

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Opponent Rating Result
Gwilym T Price 2262 ½ - ½
Gerald Moore 2159 0 - 1
James Gardner 2023 ½ - ½
Chris Davison 2219 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2166 = (8663 + 400 * (1 - 1)) / 4)

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