This is a re-visit of my guide for Ubuntu Feisty, updated for Gutsy.

1. Install 3D drivers for your video card if you have not already. It may work without these drivers on some cards.
2. Install dependencies:

sudo apt-get install python-imaging python-opengl libgtkglext1 python-gtkglext1

3. Launch Applications –> Games –> Chess
4. Go to View menu and select 3D

For an extra challenge, install the crafty engine:

sudo apt-get install crafty

Wiki Page: https://help.ubuntu.com/community/3DChessboard