「Firstly, if you market it for use when travelling inside a carriage, the board must be made out of cloth so as to not interfere with the luggage. The cloth for the board will have grid lines drawn in black thread, the pieces will be sewn together from black and white cloth with a not-so-sharp slip stitch on the surface.」
「For the rich and well-paying clients: the board must be sturdily made with legs attached. The stones must also be made out of marble flakes while the black and white sides each prepared separately in a single color—that would make it feel extravagant.」