Rated Comments for a Single Item

Having looked at this again I have got to grips with your idea. What puit
me off was the use of names. To me and, I suspect, to most people into 3d
Chess, Rook means something confined to the 6 orthogonal directions,
Bishop something confined to the 12 diagonal directions, and Knight a
2:1:0 leaper. Queen may be either Rook+Bishop or Rook+Bishop+Unicorn; I
prefer the former, with Duchess for Rook+Unicorn, Governor for
Bishop+Unicorn, and Empress for all three, along with Emperor for a King
that also moves one square triagonally.
	For your pieces I would suggest names making a clear break with these
linear ones, based on the theme of Plane as a reflection of the scope of
the moves and a pun on a far greater flier than a Rook! Plane itself
cannot be used as it shares the initial of Pawn, but you might reflect the
relative powers of the pieces by calling your first piece a Jetplane and
your second a Biplane, which has the advantage of starting with the first
two letters as Bishop. The combined piece might be called a Hyperplane,
and the ruling piece is the same as my Emperor above. This frees up the
initial K to call your fifth piece a Kite, which rhymes with Knight.

Having the second part of the move be 'up to' the same number of squares
(rather than exactly the same, as has been done in some two dimensional
games) is correct, it's a very good idea.

I have raised my rating from good to excellent.