Event: Division One

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Opponent Rating Result
Richard J McMichael 207 ½ - ½
Ilya Iyengar 187 ½ - ½
David J Grant 203 1 - 0
Dave J Ledger 208 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

201 = (805 + 400 * (1 - 1)) / 4)

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