Event: Division 2

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Opponent Rating Result
Joshua Gittins 145 ½ - ½
Graham D Neville 157 ½ - ½
Alun Richards 142 ½ - ½
Alun Richards 137 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

145 = (581 + 400 * (0 - 0)) / 4)

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