Extra pieces:

This will be updated regularly

The royal fmG isn't 2 zorkmids at all, it's actually 3.

So it's no cheaper than a royal fmGbmD, which fixes the problem of just having a royal fmG.

Outside of hex, this diagonal also appears in a 4D tesseract board, in the same way that the 3D ND appears in 2D hex boards. Specifically, the (1,1,1,1) move is a Rumbaba move. The numbers of directions differ though, with WORLD having 80 directions rather than a mere 38.

I have some disagreements with some of the names Gilman has chosen here, and would like to propose my own set, inspired by the existence of this diagonal in 4D hypercubic (in much the same way as the ND exists in 3D cubic and 2D hex).

To start with, the name "Rumchick" is misleading. -chick is the suffix for non-coprime orthogonals. While the FO Rumbaba has the same length as the Dabbaba, it is not one. So, instead, I will return to the pattern theme rejected by Gilman with MALTESE, an eight-pointed cross for the eight forward directions in 4D.

Next up, the World- and Day- pieces are misnamed. They are not generals, but fully symmetric pieces (HD forms of MAB 01 rather than 04). So, in the usual King Queen Prince Princess Princeling order, I will name them OVERLORD, IMPERATRIX, IMPERATOR, PRAETRIX and PRAETOR.

Now we get to the main collection. The augmented Praetors. Gilman names them after the fully-symmetric component, but this leads to the problem mentioned with their riders, so I have continued in the vein of MAB 04 and the lesser generals here.

For the weakest of the four-component generals, I have chosen seasons. WINTER- for Wazir + Sycophant (its similarity to Wazir justifying the theme), SPRING- for Ferz + Dissenter, SUMMER- for Viceroy + Spokesman and AUTUMN- for Rumbaba + Conqueror.

For the strongest generals, I have chosen card suits, using the Latin system (similar to that in Tarot). I would have chosen elements, but Fire- was taken. So Point + Loyalist gets BATON- (weapons of massed loyalists), Cross + Revolutionary gets SWORD- (as in the Crusades), Saltire + Premier gets CUP- (to fit the theme) and Maltese + Archduke gets COIN- (pieces of 8 and connection to power).

For the intermediate generals, I have chosen somewhat arbitrary pairs with some symbolic connection to the components. For those pairing SD with orthogonal, Sky- and Wind- point to AIR- for Prince + Bellboy, while Coast- and Desert- point to EARTH- for Princeling + Bellman. For those pairing ND with orthogonal, Storm- and Forest- point to LIFE- for Duke + Host, while Moon- and Lava- point to DEATH- for Landlord + Count (both somewhat associated with death and evil anyway). Finally, for those pairing HD with orthogonal, Sun- and Fire- point to LIGHT- for Marquis + Heir, while Sea- and Dusk- point to DARK- for Baron + Viscount.