for ages my brain has continually looped around the standard point of how 4D chess is every normal 3D game of chess being played, but since 4am this morning when i woke up ive been realised the fact that 2D chess is the most common form of chess that most chess masters play these days online. So now im stuck trying to conceptualize what 1D chess is, and how absolutely difficult to play that would be.
So in summary 1D chess and 5D chess are where it gets difficult while 2D-4D chess is all the same degree of difficulty.