Event: Derby & District Division 2

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Opponent Rating Result
Vaughan WG Smith 1565 0 - 1
Stuart Marshall 1713 0 - 1
David J Pickering 1707 1 - 0
Jon Jenson 1516 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1525 = (6501 + 400 * (1 - 2)) / 4)

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