Event: Norfolk County Chess Championships

Opponent Rating Result
Ken B McEwan 2125 ½ - ½
Adrian G Elwin 2037 0 - 1
Dan Joal Allwin Christopher 1759 0 - 1
Andrew D Hartland 1847 1 - 0
Jeff R Dawson 1902 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1854 = (9670 + 400 * (1 - 2)) / 5)

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