Event: 30 Minute Rapid

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Opponent Rating Result
Robert J Arthurton 1471 0 - 1
Keith May 1013 1 - 0
Paul Rutter 1444 0 - 1
Michael Brant 929 ½ - ½
Calvin Roberts 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

971 = (4857 + 400 * (2 - 2)) / 5)

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