Very good attempt.
A couple of things I see amiss:
There is a piece (or a finger) above the Pawns that is distracting.
The baseline of the Pawns is thrown off by the shadow cast by the white Knight.
There is a color gradiation of the Pawns and I suspect they are all the same color.
I think you are wanting to showcase the white Knight, but because the black Knight is not lit enough to show any detail, it just looks out of focus rather than having bokeh.
Very moody and nicely thought out, unfortunately the execution didn't quite make it IMO.