Event: Norfolk County Chess Championships- Challengers

Opponent Rating Result
Armando Galletti 1700 1 - 0
David J Payne 1744 0 - 1
Diana Vallverdu 1300 1 - 0
John F Lambert 1732 0 - 1
Chris J Tuffin 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1375 = (6476 + 400 * (3 - 2)) / 5)

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