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@HGMuller

The first problem to solve is that the square coloring doesn't alternate properly. If there's a way to set colors more manually, I'll do that. I think the coloring is important to see the bishop bindings and rook's alternation, so I'm not willing to just leave it as is. I can't put just one hole between little boards, or the knights will be afforded an incorrect move. I could put three holes between little boards, but that'll have quite a bit too much empty space (can you thin specific ranks+columns?).

Skimming the documentation page for the interactive diagram, I think I can do this, but just by creating a background image and setting the background parameter (keeping two spaces between boards)? That's a little obnoxious, and something like Game Courier's method for specifying custom coloring patterns would be nice, but also not a big deal.

Ideally I could override the coordinates

This doesn't seem possible besides setting a starting rank number, but I can suppress coordinates altogether. A new parameter with comma-separated rank/file names would be really nice.

You can embed a JavaScript function xxxShade(x,y) on the page, which returns a color (like '#ffc080'). (Where xxx is the value of the satellite parameter.) Which will then be used for the square with internal coordinates (x,y). (Where the lower-left corner is (0,0).)

The problem with coordinates is that these are not just for dressing up the image, but are used in notation. By allowing arbitrary coordinate labels it would be possible to define coordinates for which SAN can no longer be unambiguously parsed.

Thanks! Colors look good, so the 2-square separation will work, and I've now entered the main "round" initial setup. Next up is adding the higher-dimensional moves! Done! Oh, and I notice that your diagram on the ID page has the Move Diagram with pieces on a non-central square: how do I do that?

At the rate you guys are going with these, I half-expect you'll be able to make a diagram for Chess on a Tesseract by the end of next year. :)

You can do 1-square seperation like this:

I have no idea how that XBetza is accomplishing this, having just last week learned enough to understand the original version, but yes, the knight moves look correct! (You've kept the rook and bishop as 1- and 2-d, while in this game they pick up the 3- and 4-d slides respectively; and the pawns in this game don't get diagonal captures forward-forward or forward-backward. But I assume that wasn't the point.)

BTW, I updated my last comment, and the diagram should be fully functional. I just want to know how to put the pieces somewhere other than the center of the Move Diagram, and I'll put (probably an updated 1-space sep) diagram into the page. (Also, since it can't have the right coordinates, I'll be keeping the current setup diagram in the page.)

I played against the ID's AI. I didn't give myself very long per move, but it trounced me pretty thoroughly. I wouldn't be too surprised if the game turned out to be extremely tactical rather than strategic: everything is so close!