An evil-looking puzzle

Let me introduce you to this ‘evil-looking’ puzzle that marks a real milestone for me. 

This challenge isn’t just tough—it's guaranteed to have exactly one unique solution. If you manage to solve it flawlessly (the system on my blog will let you know if you make a mistake), be sure to drop a comment and let me know how many attempts it took you! I’m really curious to see who can conquer this one.

 

Update:

I’ve minimized the clues since the original version — and somehow it looks even more intimidating now. Yet the logic remains perfectly intact, with a single unique solution still guaranteed.