Feature Request: Practice vs Computer - Enable user to play moves for the engine

Hi there, my feature request/s below are as follows:

So, on chess.com after you've finished a game you can choose to practice the position vs a computer. I find myself doing this in an endgame that's technically winning but I want to see if I'm actually able to convert it with perfect play. I also like the fact that I am able to play an alternate move on the engine's behalf to see how it'd turn out that way. Sometimes playing a less technically optimal move makes it much more difficult practically for me to find the win. Lastly, going back and forwards in the game is pretty straightforward as I can click on the moves list and transport back to that position and either play through the moves again, or play something else.

While Lichess allows you to 'Continue from here' via the Analysis Board after the game, none of what I mentioned above can be done and I miss those features when I use Lichess. The only feature somewhat available is going backwards in a game by a series of takebacks which isn't as easy / user friendly as the chess.com method.

This is something I'd really enjoy being implemented if possible here on lichess.

In short, I guess the feature request/s:

* Be able to play alternate moves for the engine
* Be able to move back and forwards in the game more easily / without having to use tackbacks

Thank you.

You can just use the analysis board. Depending on your hardware, I'd wait 2-4 seconds then hit the Spacebar key (which makes the best move for the computer). Put the show engine lines on 0 to hide them, or I use 3. But if I want to simulate "Practice w/ the computer" I put it on show 0 engine lines so I can't see the best move for me.

@Rairden said in #2:
> You can just use the analysis board. Depending on your hardware, I'd wait 2-4 seconds then hit the Spacebar key (which makes the best move for the computer). Put the show engine lines on 0 to hide them, or I use 3. But if I want to simulate "Practice w/ the computer" I put it on show 0 engine lines so I can't see the best move for me.

Thanks for the suggestion. I can work around it for now on Lichess, I'm just hoping for something smoother. Lichess often does things better than chess.com, but this is one thing I think they can take take inspiration from them. I get it mightn't be something many other people use so if so I'll live with it / use chess.com for that feature but if it's not too much work relatively speaking to implement it, I'd love to see it and get real mileage out of it personally.

If I understood your requirement correctly, I agree.
I usually use tha analysis board, but sometimes I just want to try: can I force a win from here? So I don't want to see arrowa or calculation lines.
I can use the "practice with the computer" option, but especially in endgame taht becomes weaker and weaker and moves very quickly.

Yea @alenbasic, I agree I see chess.com does it better. Because how I described it above I was trying to make a javascript thing for a hotkey to toggle 0 vs 3 engine lines (which simulates "Play w/ the computer").

I've barely ever look at chesscom, but saw this recently which looks nice: youtu.be/G3YOOSPhNT4?t=1930

What is nice is it doesn't show engine lines while at the same time instantly giving feedback on each move.