Event: Norfolk County Chess Championships- Challengers

Opponent Rating Result
Johnny Danger 1552 1 - 0
Stephen Livermore 1657 ½ - ½
Chris Flynn 1609 1 - 0
Graham K Blowers 1741 0 - 1
Andrew Duffell 1581 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1788 = (8140 + 400 * (3 - 1)) / 5)

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