Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
David P Jones 1460 1 - 0
Lucy Batley 0 0 - 1
Ed Orchard 0 ½ - ½
Andrew Duffell 1591 1 - 0
Peter Stone 1663 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

943 = (4714 + 400 * (2 - 2)) / 5)

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