Event: u1850 County Championship

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Opponent Rating Result
Declan Rice 1772 ½ - ½
Alan Watkins 1821 ½ - ½
Cameron J Little 1804 0 - 1
James A Briginshaw 1754 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1588 = (7151 + 400 * (0 - 2)) / 4)

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