The Great Grid Board.
Patrons get access to jpeg and tiff files of the boards so they can print their own. They also get to make suggestions for new boards and design ideas. The patreon is pay whatever you can afford:
Singularity Games Patreon
You can also get a professionally printed cloth bandanna print of the boards at Printer Studio:
Printer Studio

Even Grid Board v8

Odd Grid Board v8
My goal was to design the boards to be as versatile as possible. I am currently on version 8, which I know sounds crazy for such a simple design, but there are a lot of subtle design choices that took a bit of iteration.
For the 8 by 8 grid one of the trickiest parts was figuring out how big to make the squares. I wanted it to be compatible with the duke, an "executive" sized chess set, and the phenomenal Looney pyramids. This meant that I needed to make the squares 1.75 inches to accommodate the duke pieces at 1.5" and the looney pyramid laying on its side at ~ 1.75".
I also wanted the markings designating the board sizes to be as unobtrusive as possible while still being obvious within the context of a specific game. For example, I don't want someone playing on the 6 by 6 grid to mistakenly think they have a move that is really outside the play area. On the other hand, I didn't want the markings for the 6 by 6 grid to distract from a game played on the larger board. I wanted to give each unique board size a different distinguishing feature. The lines making up the smallest grid size in the center taper. The next size grid is more obvious in that the color changes to a grey. This also helps slit up the inside and outside grids. The outermost grid uses incomplete outlines. There are also lines indicating the half way split points on the board to aid in playing games like martian chess. I think that by providing enough small clues, the board shape is obvious when playing a specific game as the player would be primed to notice the marks specific to the game at play.
Some of my favorite games to play with the boards (images are showing an older version of the board, updated pictures to be added soon):
Matthew Ross - July 9th 2019