Event: Open County Championship

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Opponent Rating Result
Andrew JS Slough 1945 1 - 0
Adrian MS Matthews 1833 0 - 1
Andrew Bowler 0 ½ - ½
Paul McMahon 1918 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1424 = (5696 + 400 * (1 - 1)) / 4)

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