Event: Open County Championship

Opponent Rating Result
Neil Greenwood 1821 ½ - ½
Stephen W Ruthen 1898 0 - 1
David E Hall 1943 ½ - ½
Raymond J Ilett 1929 ½ - ½
John A Feavyour 1854 ½ - ½
Roy Hughes 2008 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1776 = (11453 + 400 * (0 - 2)) / 6)

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