Event: A Division

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Opponent Rating Result
Chris Vassiliou 1932 1 - 0
Tim Hilton 2002 ½ - ½
Simon Coleclough-Worrell 1700 1 - 0
Daniel C Sheppard 1833 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2167 = (7467 + 400 * (3 - 0)) / 4)

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