Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
Chris J Tuffin 0 ½ - ½
John F Lambert 1732 0 - 1
Isaak Leverett 1639 0 - 1
Johnny Danger 1550 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1030 = (4921 + 400 * (0 - 2)) / 4)

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