Regular chess is 3D, but the time dimension is so hard to use it might as well be ignored. Much like how we call our reality 3D even though there's a 4th Time Dimension.

On a purely spacial level, Chess is 2D. And this Other Chess is also only* 2D.
In Chess this is where it ends, one board and nothing else.
In Other Chess the time dimension is made spacial, and you're given methods to interact with it. They essentially double the special dimensions. Putting it to 4. Making it 4D. Once again, the TRUE time dimension is ignored because it's impossible to use. You really just play with 4 Spacial dimensions ((with some rules)) and nothing else.

the irony of it wasn't lost, lmao

Also!! This game is only 4D, the 5D is a lie. There are only 2 special dimension and 2 'time' dimensions. If it were really 5D it would be a conceptual NIGHTMARE to display. More than it already is. It bugs me a lot because it makes it harder to wrap your head around.

If my birthday weren't laughably easy to remember I probably would have forgotten it several times.

Under the Circumstances I've been shockingly nice

Fair, but I also feel it's worth pointing out that Barns n Noble isn't a library. It's a store.

There's a slightly different demographic of "People who go to stores" vs "People who go to libraries"

About 80 miles per hour down the freeway

We're really gonna let iccarus fly the plane, huh