This is an exceptionally high quality photograph with superb tones and full range of tonality to sold black.
The only technical flaw is that the lighting is unbalanced on the board. You should have another similar light on the right side. If this was done intentionally then you may have considered putting the light at a steeper angle to magnify the effect and produce some shadows. That would add interest and make the effect more obvious to the casual viewer.
I would have given a 10, if it werent for the fact, that the perspective is a little crooked. If you had taken the shot a LITTLE more to the right, it would have been perfect.
Otherwise an awesome photograph.
the cropping isnt so fantastic. too much on the right, which needs a little bit more cropped off. overall nice pic, but to imrpove, try aligning all the chess pieces in a straightline, maybe? an 8 for this shot.