Event: Division A

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Opponent Rating Result
Roman Ismailov 2009 ½ - ½
Neville H Twitchell 1955 0 - 1
Rahul Ghose 1944 1 - 0
Ashley Freeman 1970 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1970 = (7878 + 400 * (1 - 1)) / 4)

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