The pieces aren't really standing out from the board. At the moment the most visible element is the pattern on the board. I suggest making the squares much closer in value, so the pieces pop out more.
A light source more to the side of the main pawn, probably to the viewer's right would give him a nice strong edge highlight.
Perfect symmetry always makes things seem artificial and dull. Shift the camera to the side a little.
Is there any real reason that the board is larger than an actual chessboard? Seems like a normal board would work just as well; moving the pawn closer to the enemy pieces makes it easier to have them looming over him. Don't be afraid to hide some of the background figures behind the foreground one or clip a few at the edge of the image. It's pretty cear what you are showing, so no need to include everything.