Event: County Challenge

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Opponent Rating Result
James Evans 0 0 - 1
Bernard Ross 1203 1 - 0
Anton Drel 1510 1 - 0
Nigel White 1443 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1239 = (4156 + 400 * (3 - 1)) / 4)

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