Event: Open County Championship

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Opponent Rating Result
Stephen W Ruthen 1843 1 - 0
Benjamin PQ Collinson 2072 0 - 1
Konrad Scheffler 0 0 - 1
John A Feavyour 1855 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1243 = (5770 + 400 * (1 - 3)) / 4)

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