Glad you like the puzzle, I will be putting some more so stay with me ok?
The most beautiful chess puzzle of all time!!
@MustangMate: Several moves win in your last puzzle. Only one move checkmates in 1 but you didn't ask for that. Here is an alternative that works:
Btw, your forelast puzzle is much more interesting. Can't remember the solution but it is great!

The one where you have to promote to a knight, I failed it twice, first I promote to a bishop, but I got stale mate. Then on second try I promote to knight, epico

Again Santiago, great puzzle. Do I dare ask...did YOU compile or make up the puzzle? It wouldn't surprise me if you did. I'm sorry that I haven't been on the "SKYPE" track with you. Chess has not been a priority as of late. Honestly though, I do look forward to playing chess with you. Hope all is well with you Santiago, and you are enjoying life. ~Michael~
I checked a few chess databases, and this is indeed an original problem as far as I can tell.
Similar to this puzzle by Bodo Van Dehn: https://www.learnchess.co.uk/a-chess-knightmare-can-you-solve-it/
Perhaps he composed it or it's a direct variation.

I made a video on this puzzle: https://www.youtube.com/watch?v=fUjbZTlTjvQ&ab_channel=ChessMastery
White to move and Win