Congratulations on this shot - not a negative comment to be seen. I like the tones; especially the B&W in B&W. Very nice. This is technically fine - all in focus and well lit.
Regarding the composition. I feel there are a number of areas you could have improved upon for a higher score. It is a great shame that the top of shadow to the black king has been cut of. The perspective of the checks on the board is a bit odd, the way they start parallel to the frame on the left and finish at such an angle to the right - this really throws the eye out. For some reason the whole balance of the shot conveys to me a feeling of angst - I can't really put my finger on exactly what though. My guess is that this is why the shot did not do as well as all the comments indicate it should.