You can move the slot to the Side Room

[eriktorbjorn]

In the Royal Puzzle, if you push a wall into a "room" where there are objects, they are moved to CP-OUT. (See CPWALL-OBJECT.) For takeable objects, I assume this is deliberate, and I guess it makes sense that you get the "snap" noise when pushing a wall into the "room" with the slot, as a clue to the player that there was something special about that room.

But it seems strange that the slot is then magically moved to the other room. Particularly if you then put the book in the slot from there, and it says a passageway opens to the west. You can then enter the puzzle from the side, even though there should be a wall in the way.