Event: Division One

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Opponent Rating Result
Marek J Soszynski 164 0 - 1
John Freeman 140 1 - 0
Alan K Crombleholme 172 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

159 = (476 + 400 * (1 - 1)) / 3)

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