스도쿠 큐브 퍼즐 | 극도로 어려운 스도쿠 버전

The 27 ground blocks turn so smoothly compared to my old plastic puzzle, and getting all nine digits aligned on one face actually feels like a real accomplishment. Still stuck on the last two sides, but I keep picking it up every night after dinner.

I've spent three evenings on this and only solved one face so far, which tells you the difficulty rating isn't exaggerated. The blocks glide smoothly with no sticking, so it's clearly well made. Genuinely the most challenging puzzle I've picked up in years.

Those 27 precision ground blocks turn smoothly without that gritty plastic feel cheaper cubes have. I've sunk about six hours into it and still haven't solved a single face, which sounds bad but it's exactly what I wanted. The difficulty is real, not marketing talk.