Event: Division One

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Opponent Rating Result
Anthony Sadler 170 ½ - ½
David Dunn 166 0 - 1
Marek J Soszynski 156 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

31 = (492 + 400 * (0 - 1)) / 3)

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