Event: Division One

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Opponent Rating Result
Golam S Ali 175 ½ - ½
Peter J Pearson Jones 152 ½ - ½
Christopher J Bellin 143 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

157 = (470 + 400 * (0 - 0)) / 3)

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