These are an amazing exercise! It can help us to see our surroundings for what it actually is, in an artistic sense- just masses of light and dark.
And by limiting ourselves to only black and white, we can study that more clearly!
Also in the attachment you'll find the brushes that I used to make this drawing, it is the same brush that I used for the Chateau project, with the one rake brush that I used to create the hatching effect.
I hope that you will join the challenge, and create drawings of your own!