Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
Dennis G Driscoll 1333 1 - 0
Peter Stone 1663 ½ - ½
Graham K Blowers 1723 1 - 0
David C May 1498 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1754 = (6217 + 400 * (2 - 0)) / 4)

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