Event: Division A

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Opponent Rating Result
Harry Newman 0 ½ - ½
Peter Dickinson 122 1 - 0
Dave S Almond 138 1 - 0
Phillip J Taylor 149 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

302 = (409 + 400 * (2 - 0)) / 4)

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