Event: Division A

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Opponent Rating Result
Richard Britton 0 ½ - ½
Tom A Barton 1915 1 - 0
Jeff A Goldberg 2147 ½ - ½
Zaki Harari 2082 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1636 = (6144 + 400 * (1 - 0)) / 4)

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