Event: u1850 County Championship

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Opponent Rating Result
Declan Rice 1772 1 - 0
Andrew Maclaren 1818 ½ - ½
David Scott 1835 0 - 1
Neil Greenwood 1821 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1812 = (7246 + 400 * (1 - 1)) / 4)

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