Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
Ed Orchard 0 0 - 1
David B Elsey 1389 1 - 0
Chris Perkins 1659 0 - 1
Dennis G Driscoll 1330 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

995 = (4378 + 400 * (1 - 2)) / 4)

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