Event: B&DCL Div 4

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Opponent Rating Result
Tim Joyce 1661 1 - 0
Liam Hardman 1650 1 - 0
Robert M Willington 1672 0 - 1
John E Harris 1578 1 - 0
Tarik Reghif 1688 0 - 1
Andrew M Alderton 1587 ½ - ½
Liam Hardman 1650 0 - 1
Paul T Errington 1586 ½ - ½
Chris D Lane 1481 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1661 = (14553 + 400 * (4 - 3)) / 9)

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