Event: Division 1

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Opponent Rating Result
Daniel M Lambourne 181 ½ - ½
Rob E Wilden 149 1 - 0
Ian R White 173 ½ - ½
Phil Markham 148 0 - 1
Ian A Robson 191 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

88 = (842 + 400 * (1 - 2)) / 5)

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