Event: Norfolk County Chess Championships- Challengers

Opponent Rating Result
Dan Joal Allwin Christopher 0 ½ - ½
David C May 1498 ½ - ½
Heather Enid Walker 1183 1 - 0
Stephen Livermore 1622 0 - 1
Graham K Blowers 1723 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1125 = (6026 + 400 * (1 - 2)) / 5)

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