Event: Norfolk County Chess Championships

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Opponent Rating Result
Stephen LA Orton 2116 0 - 1
Dan Joal Allwin Christopher 1759 ½ - ½
Chris Perkins 1774 ½ - ½
Jim McAvoy 1783 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1758 = (7432 + 400 * (0 - 1)) / 4)

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