This is a collapsible chess board, to provide a full-size playing surface that can be folded up and take on the go.

If you like this, check out my remix that adds various designs to the pieces: https://www.thingiverse.com/thing:4193615

The default size of each square is 35 mm and the assembled board comes out to about 280 mm (11-3/8") square. It can fold up into a stack in either direction about 2" tall (or in half, 3 rows, or whatever combo you want).

This design just requires four different pieces, with two different colors… or however many you want, really. But for the purposes of this description I’ll be using two (Colors “A” and “B”).

Bill of materials is as follows:

Square_MIDDLE (Color A): 18 Square_MIDDLE (Color B): 18

Square_EDGE (Color A): 12 Square_EDGE (Color B): 12

Square_CORNER (Color A): 2 Square_CORNER (Color B): 2

Hinge (Whatever color): 112

I've found making batches of 6 works out pretty well for the squares, and for the hinges I started printing batches of a dozen and even up to 48. The key with the hinges was printing on a raft an position them vertically, it really helped the quality of the entire batch on my printer. If you have a solid printer the squares will need little or no cleanup if it can handle the 1.5 cm bridge. Find what works for your printer, and as always working it around a bit helps smooth off any burrs and smooth things up

My printer is pretty low-end, so I played around with the clearance on the hinges to find what worked. If you print this out on a really nice printer and find that the clearance is too loose, let me know and I can create a part with a tighter clearance for you.

https://www.youtube.com/watch?v=cD9noHQuFN4