World's Hardest 9-piece Puzzle

Notice: several of you messaged me about multiple solutions to this puzzle. I've designed a new one (see my page for the updated version) with only one possible solution. Check it out!

This is the world's hardest 9-piece puzzle. Based off the original puzzle “One Tough Puzzle” with 48,704,929,136,640 (over 48 trillion) possible combinations, this seemingly simple puzzle is incredibly complex. Challenge your friends to solve the puzzle and watch as they struggle until begging to know the solution. I have included the print profile (A1 Mini friendly) printing the puzzle pre-solved and a challenge profile with the pieces printed separately. I challenge you to try to solve it without looking at the solution picture! It's astounding how complicated this puzzle becomes. Feel free to share your experiences in the comments below!