Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
John F Lambert 1732 ½ - ½
David P Jones 1356 1 - 0
Chris J Tuffin 0 ½ - ½
David C May 1567 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1364 = (4655 + 400 * (2 - 0)) / 4)

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