Another amazing underpromotion to each of the 3 pieces puzzle. However, there might be a conflicting line where stockfish can hold a draw, I'm not sure exactly what moves it occurs at though.
This is one of the greatest endgame studies ever.
It is bit-perfect, you have just copied it wrongly (there is an extra white pawn at c4).
Not sure if this is a repost, but I found this today: