Can I permanently link to a lichess board with a certain position to play out against Stockfish?

I tried this in my blog: explain a pawn endgame and then link to the position in Lichess for the reader to play against the machine and make sure they understand how to win it. But the Lichess link I created by setting up a board and click "play against the computer" didn't stay active for very long. Hot to make it permanent?

Use a study with a practice chapter, like lichess.org/study/GnYRXtcS

Wow, that's great. I didn't think it would be possible to set up a "your move, play this against the machine" scenario within a study.