I unlocked this in FreeCell Expert.
Start a new game in Expert mode (if your game is not english, this is the mode with the biggest XP bonus).
NEW SOLUTION - IN-GAME SOLVERThere is a free built-in Solver in the game, you can activate it on the bottom menu after level started. Free users must watch an ad after every activation. Just follow the steps, easy and simple!
OLD SOLUTION - ONLINE SOLVERThere is a game code marked with #. You can use this code in any solver, for example:
https://fc-solve.shlomifish.org/js-fc-solve/text/Just enter your game code and click on the Solve! button! Scroll down for animated solution!
If you got any error message or blank screen, there might be a problem with your browser. Google Chrome 94.0.4606.81 on Windows 11.