Event: Norfolk County Chess Championships

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Opponent Rating Result
Martin G Walker 2187 0 - 1
Jim McAvoy 1849 ½ - ½
David J Payne 1809 ½ - ½
Nathan J Abbott 1891 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1834 = (7736 + 400 * (0 - 1)) / 4)

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