Event: Super League

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Opponent Rating Result
Michael Ashworth 2099 0 - 1
Paul R Masters 2010 0 - 1
Daniel M Lambourne 2034 0 - 1
Michael Ashworth 2179 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1781 = (8322 + 400 * (0 - 3)) / 4)

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