Event: Super League

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Opponent Rating Result
Peter Kirby 2051 ½ - ½
Andrew Horton 2451 ½ - ½
Michael Ashworth 2131 1 - 0
Duncan Dicks 2104 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2384 = (8737 + 400 * (2 - 0)) / 4)

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