It's weird how this thread says it was last posted in 7 days ago when I just created it...
Mimicking Morphy

Well, mate is not quite inevitable: 21... Kg7 22. Qf7+ Kh8, and there's no clear way to mate.
23. Rf6 Qxf6! 24. Qxf6+ Kh7. If White don't continue with checks, Black either exchanges the White Knight, and a long enough endgame ensues, or, if Knight moves, they play e3-e2!, and White actually lose.
23. Ne4? is also countered with e3-e2, and after 23. Nd5 Black answer Qg8!, forcing perpetual check (Queen exchange is fatal for White).
Morphy being my favorite player, I try to play like him. I believe I'm getting there.