I really like this composition. The lighting is pretty good and the Queen’s position looming over the fallen piece works pretty well. It can be enhanced by using a shorter focal length, or setting the Queen a teeny bit closer.
I also think the background here works well, but you could make it tie better into the scene by further adjusting the contrast and brightness, and maybe adding a blur effect to better sell the depth of field, maybe using a gradient map in Photoshop to have the blur begin subtly to the left of frame and become more evident towards the right, where the bookcases would be “farther” away.
Overall, I think this is good work. When I did my own Chess scene about a year ago, I brought in some dungeon assets from BlendSwap to build a room for it all. That, however, made my render times a lot longer, because Cycles needed to calculate all the added bounces (the fact that I also added a fire simulation for dramatic effect didn’t help at all, either). The good thing is that you can be very flexible with what you want to put in your scene, and very simple setups can end up looking really nice with a good amount of work and care.
Great job!