chess board (warning: large image)

Rendered with yafray using HDRI

http://wizzard.sin.khk.be/blender/chess1.jpg

Look great, but you need a much higher resolution texture for the board.

I don’t know what sort of material the pieces and the board are supposed to be but such sharp reflections are very unlikely. And I agree with the texture for the board. It really looks out of place when rendered along with those sharp reflections.