Event: B&DCL Div 5

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Opponent Rating Result
John Beasant 1415 1 - 0
Michael Tew 1240 ½ - ½
Ken Dixon 1409 0 - 1
Rachel Richardson 1337 0 - 1
Angus Norman 1100 0 - 1
Ken Dixon 1409 0 - 1
Andrew A White 1000 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1159 = (8910 + 400 * (2 - 4)) / 7)

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