B&W is a good choice for the darkness challenge topic. Perspective is fine. Including the piece shadow is a nice touch. Greys are generally OK and you have a good black point set. Many images do not have good black points set in this challenge.
Compositionally there seems to be a lot of wasted space left and right of the chess pieces that could be removed from the composition.
The biggest issue with this image that will hold the score back is the focal plane. This image is focused on the far wall. A common problem with autofocus cameras is they sometimes focus where you don't want them to. That appears to be the case here. Even if done purposely most voters will think it is a focusing error. The queen, which occupies the dominent position in the frame, is not in proper focus. A confusion for the viewer is that the king, which is better focused but is located right behind the queen. The viewer has to study the image too hard to figure that out. That may have been your intention but most viewers will not "get it" if it is and score it lower because of it.
Did you mean to have the focal point so far back? Centring on the rooks and ensuring the white piece was in focus, whilst defocusing the background would have made this more interesting. Also, cropping the left hand side would bring the shadow slightly more into the centre. 6
The back wall is nicely in focus, but the subject would seem to be the chess pieces which are all blurry and competing for attention with the wall's texture.