Event: Division Four

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Opponent Rating Result
Stephen V Woodhouse 158 ½ - ½
Matthew Lo 125 1 - 0
John H Pakenham 99 1 - 0
John Davis 117 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

425 = (499 + 400 * (3 - 0)) / 4)

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