I created these Squares to create a chess board, but it can be used for creating any kinds of walls. All of the squares can be extended or cut to any size. I also created multi shaped chess pieces. 

The chess board is printed in pieces. It's assembled via dove tails. The parts slide together.

Update: I increased the size of the base of the chess pieces so that they're more stable.

I also added G-codes for the Mini and a MK3 printers.