Event: Division One

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Opponent Rating Result
David Dunn 173 ½ - ½
Peter J Pearson Jones 152 1 - 0
John Sneberg 0 1 - 0
Derek Laight 151 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

419 = (476 + 400 * (3 - 0)) / 4)

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