Event: Division Two

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Opponent Rating Result
John D White 149 ½ - ½
Yasser Tello 159 1 - 0
Chris J Todd 168 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

292 = (476 + 400 * (1 - 0)) / 3)

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Opponent Rating Result
Petr Vachtfeidl 166 ½ - ½
Chris J Todd 169 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-33 = (335 + 400 * (0 - 1)) / 2)