Event: Norfolk County Chess Championships- Challengers

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Opponent Rating Result
David E McLean 1697 0 - 1
David B Elsey 1407 1 - 0
Stephen Livermore 1657 1 - 0
Armando Galletti 1675 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1609 = (6436 + 400 * (2 - 2)) / 4)

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