Event: Derby & District Division 2

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Opponent Rating Result
David J Pickering 1737 1 - 0
Owen Dale 1629 ½ - ½
Nigel D Marshall 1448 1 - 0
George Gledhill 1526 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1785 = (6340 + 400 * (2 - 0)) / 4)

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