Select all en save it as a pattern. make your workspace 3 times bigger.
in my case I ended up with a file of 2400 x 2400 pixels. Then I filled it up with the pattern I made in step 5
Use the original layer to make the walls. Cntl + T(ransform).
Then hold cntl-key down while picking up the top corners and move them down under the 50% layer in step 8.
Copy the layer 3 times and rotate each layer to it's position.
by holding the shiftkey while rotating it you will keep everything in angles of 0,45,90,etc degrees
Rotate and scale each piece at your desire in the box.
After placing them. put them all in one layer and recall the colorsettings from the lightning effects.
The ones in the back I created by using the combination of a circle from the bishops head and the round knob of the pawn.
Place the hand in the box. Also select the chess piece from the hand and make it also white like I did in step 13.
Also for the hand layer recall the colors and filer the hand with the lightning settings from step 11. Done