Event: u1850 County Championship

Opponent Rating Result
Alan Watkins 1821 1 - 0
Declan Rice 1772 ½ - ½
Hazel Bowler 1809 0 - 1
Tom Gordon 1691 ½ - ½
Anthony Chan 1760 1 - 0
Hazel Bowler 1809 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1910 = (10662 + 400 * (3 - 1)) / 6)

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