Event: Open

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Opponent Rating Result
Phil Bull 159 0 - 1
Anthony Sadler 149 1 - 0
Nicholas A Walker 181 1 - 0
Phil Bull 159 1 - 0
Anthony Sadler 149 1 - 0
Marek J Soszynski 149 1 - 0
Nicholas A Walker 181 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

447 = (1127 + 400 * (6 - 1)) / 7)

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