This is a really fine face, full of character and detail and history and hurt and pain and happiness and joy and light and dark.....why did you do that to the edges????
The tones are very good here, but the combination of the strong backlighting and this crop don't work for me personally. IThe chin is ever so slightly cropped, and in general I think the guideline when you do this is to either REALLY cut it or don't cut it at all. This is perhaps also true of the top of her head. So the overall image feels more cramped than a close crop, as some images do so effectively. Also, a little fill on the shadow side of her face would have done a lot of good, including maybe getting some light into her right eye. Hope that helps.
A pity the background light was so strong, and the lack of chin focus is a distraction. Otherwise an excellent choice of model for a B&W shoot. You captured some character well. 6.