Event: B&DCL Div 3

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Opponent Rating Result
Richard W Ursell 1788 0 - 1
Graham Hillman 1690 0 - 1
Tim Joyce 1698 0 - 1
Tim Jones 1698 ½ - ½
Richard W Ursell 1788 0 - 1
Daniel Miles 1650 0 - 1
Graham Hillman 1690 0 - 1
Andy Matko 1700 ½ - ½
Tim Jones 1698 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1400 = (15400 + 400 * (0 - 7)) / 9)

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