Event: Open County Championship

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Opponent Rating Result
Declan Shafi 2288 0 - 1
James Gardner 2023 0 - 1
Jaden Jermy 2070 1 - 0
Norman A Hutchinson 1994 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1894 = (8375 + 400 * (1 - 3)) / 4)

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