Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
Heather Enid Walker 1183 1 - 0
Chris Perkins 1659 1 - 0
Ben Yelverton 1734 0 - 1
Dan Joal Allwin Christopher 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1144 = (4576 + 400 * (2 - 2)) / 4)

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