Event: Essex Summer Rapid Knockout

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Opponent Rating Result
William J Stirling 1931 ½ - ½
William J Stirling 1931 1 - 0
David Spearman 2037 0 - 1
David Spearman 2037 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1884 = (7936 + 400 * (1 - 2)) / 4)

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