Event: Norfolk County Chess Championships

Opponent Rating Result
Trevor J Ansell 1892 0 - 1
Jim McAvoy 1833 1 - 0
Jonathan L Collins 1929 1 - 0
Andrew D Hartland 1869 1 - 0
Stephen LA Orton 2144 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2013 = (9667 + 400 * (3 - 2)) / 5)

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