Kevin Pacey wrote on Wed, Jan 20, 2016 08:13 AM UTC:
Thanks H.G. for your reply. "Custom board" diagrams are described this way in Game Courier documentation, so it seems your answer of 'no' is right on, as I had very oddly shaped boards as one possible thought, for one thing.
For now, I had been a bit curious about circular boards, and wished to test making a diagram for one from scratch, by simple means if possible. If I wish to, I think I can cut and paste the http address for an existing setup diagram, such as I've seen on a number of webpages on this website. I'd be confined to using the setup that it depicts, unless I combined it with other (preferably circular!?) setup[s], to create a 3D (or even 4D?!) variant of my own, for example.
Even using just one circular board setup diagram, however, I might invent my own rules for the piece movements to be used for any possible variant of mine, to be played on that circular board. Recall (naturally) that many variants have been created using just the setup for standard chess.
In regard to diagrams for "custom boards" again, I also was thinking of, say, even 8x8 boards with graphics on individual squares (or some of them). I think I've seen at least one such board used for a variant included on this website. A whimsical thought that came to me the other day would be to somehow combine Chess and Snakes & Ladders, though it would be a very involved and lengthy project to complete, I suspect.