Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
David C May 1498 ½ - ½
Kenneth R Ellis 1396 1 - 0
John F Weston 1585 0 - 1
Steve Sanders 1600 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1620 = (6079 + 400 * (2 - 1)) / 4)

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