Event: Division One

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Opponent Rating Result
Sean Ralph 162 0 - 1
Keith R Ingram 175 ½ - ½
Amrik J Singh 159 0 - 1
Christopher J Bellin 168 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-134 = (664 + 400 * (0 - 3)) / 4)

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