This requires a multi-material printer. Please refer to the included gcode and PrusaSlicer 3mf project file for a reference for how to print the checkerboard pattern, which bodies to print with ferromagnetic filament, and where to pause the print to add magnets.

Minichess is a chess variant that uses a small 5x6 board, with a reduced number of pieces. There are several different starting positions that can be used.

The rules of chess apply, but without pawn double-moves.

The pieces and board are intended to be magnetized with 6x3mm magnets. There is a storage tray with a magnetic latch. The drawer piece includes internal volumes that are intended to be printed with ferromagnetic filament. The different sizes are:

Large:     6.7" x 5.7" x 1.3"
Medium: 4.4" x 3.8" x 0.8"
Small:      3.4" x 2.9"x 0.6" 

You can find a set of rules and an online version here:
https://greenchess.net/rules.php?v=5x6-chess

If you would like to purchase a copy, I sell sets at:
https://www.etsy.com/listing/1498803970/chess-5x6-minichess-set-chess-variant

The pieces for this set can be found at:
https://www.printables.com/model/329127-travel-chess-pieces-with-6mm-magnets