Event: Super League (rapid)

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Opponent Rating Result
Michael Ashworth 2089 0 - 1
Michael Ashworth 2068 0 - 1
Nigel Hosken 2100 0 - 1
Daniel M Lambourne 2134 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1798 = (8391 + 400 * (0 - 3)) / 4)

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