Event: Division 1

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Opponent Rating Result
John Jeremiah 109 1 - 0
Jon Duckham 158 0 - 1
Paul Groves 109 1 - 0
Chris Fewtrell 136 ½ - ½
Darren Freeman 158 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

134 = (670 + 400 * (2 - 2)) / 5)

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