Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
Alan F Page 1744 0 - 1
Heather Enid Walker 1261 0 - 1
Sharvari Saharkar 1473 0 - 1
Thomas Ewart 1603 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1320 = (6081 + 400 * (1 - 3)) / 4)

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