Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
John F Weston 1585 0 - 1
Benjamin Whalley 1450 ½ - ½
Kenneth R Ellis 1396 ½ - ½
Andrew Duffell 1591 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1406 = (6022 + 400 * (0 - 1)) / 4)

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