Is it possible to fully premove a queen vs lone king endgame?
Yes, it is possible to play with an invisible king - or even with forces entirely invisible to the adversary - but one needs additional rules about "selfchecking the king". Required is an arbiter (computer is OK) who warns one or both players that a selfcheck has been attempted and demands correction. Can you try any amount of corrections or do you let's say lose after 3 selfchecks in a row?
I probably found a method on how to do the queen vs lone king checkmate, all moves being a premove, but it requires lots of thinking and is not useful when in time trouble due to needing to think of all of the possible moves by their opponent's lone king, and the reason it requires thinking even when it's premoves, is because you don't do a premove combo, you just simply premove 1 at a time, so you need to remember which premove you need to play depending on what your opponent plays. I'll keep analyzing to see if my method was right, but for now I can show you a position which you'd like to have when premoving in such an endgame due to it leading to a forced mate with premoves only.
With that position, the king is forced to 1 square everytime, so you don't need to worry about the king escaping while you're premoving.
Alright, I'm pretty sure I found the method. So your plan will be to box the king somewhere in the area of the red squares:
So what I do to bring the king into the area of the red squares, is to put the king and queen in the center.
Now, our required position which we will need to achieve is this:
Also, the square colors don't matter or the direction (it can be mirrored, upside-down, etc. depending on where your king is), you only need to get this position, with the king touching the rim by the way. It also doesn't matter if it's black or white to play, because I'll explain how you can checkmate either way, later on in this text. Anyways, to get the king to the red squares and set up the position as shown on the image above, you have to do this:
Anyways, now that we reached that position from the image, let's talk about how to turn it into checkmate progress.
If it's White to move:
If it's Black to move:
Anyways, if you want to know how to do the checkmate, then read the message above this current one.
Yeah I did think of a full premove sequence when making this topic, but later found out that it was impossible, but then I found a way on how to win such an endgame using 1 premove at a time.

For example, in the "If it's White to move" position your sequence is conditional. But there is a full premove sequence:
1. Qa7, premove Kd6 Qe7 Kc6 Qb7 Qd7.

Off the top of my head... yes, but I'm guessing it might take close to 50 moves.
The process I use for time scrambles is like this
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Obviously these weren't best moves. I was trying to copy how it usually looks during a game.
Keeping the king and queen together does 2 important things:
1) Your queen wont be lost no matter what your premove is
2) Your moves are a short distance, so you can move faster (this is useful in any time scramble).
your playing the queen like it's rook and king vs king. you don't need to move your king so much. I'd really consider refining your technique.

your playing the queen like it's rook and king vs king. you don't need to move your king so much. I'd really consider refining your technique.
I don't think you understand what is going on in this thread. Read the first post at least.

your playing the queen like it's rook and king vs king. you don't need to move your king so much. I'd really consider refining your technique.
I don't think you understand what is going on in this thread. Read the first post at least.
I read it, you're trying to premove. My point is you can still play with the queen.
I need to know so that I won't run out of time anymore if I am in such a situation.