Event: Division A

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Opponent Rating Result
David Spearman 2103 0 - 1
George Horan 1964 1 - 0
Peter W Rose 1827 1 - 0
Colin R Ramage 1927 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2055 = (7821 + 400 * (2 - 1)) / 4)

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