Event: County Championship

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Opponent Rating Result
Denis Georgiou 1846 1 - 0
Murray D Smith 2188 0 - 1
Francis J Bowers 1855 ½ - ½
Herman FF Kok 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1572 = (5889 + 400 * (2 - 1)) / 4)

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