Rules
https://en.wikibooks.org/wiki/Four-Player_Chess/How_to_play%3F
Printing & assembly instructions: The board
The board can be printed with an FDM printer. If you have a large printer, I recommended that you scale up the parts to get the largest possible board for a nicer playing experience.
On an MK3 - scale the model to 120%
Print two copies of each file and snap all four together.
No support needed.
At least 10% rectilinear or gyroid infill.
I've added several board options with different designs. The “Customizable” board has 4 holes in it where you can fit your own attachments (decorations, etc.).
The dimensions of the holes: 34.5mm, 31mm diameters and 10mm depth.
Printing instructions: Chess Pieces
I've designed this for SLA printing, but FDM can work with some care. If you're printing on an FDM, print one piece at a time, at low speeds and with a small nozzle diameter.
I've also added another version with supports already included.
Again, if you have a large printer, I recommended that you scale up the pieces for a nicer playing experience.
The author hasn't provided the model origin yet.