Hey I am playing with fluid for my games and was looking for good chess.com icon for my dock.

I found the chess.com icon, and love it, the only problem is the image below has a white boarder/background and looks ugly on my dock. Does anyone know how to edit an icon to get rid of the white background or is there an image of the pawn without the white floating on the web. 

Thanks,

TBT

http://www.chess.com/download/view/chesscom---high-res-logo-pack2 ?