The Hanayama Cast Helix puzzle is one of the top rated in terms of of difficulty in their range.
The aim is to remove the ring from the star and then put it back to the starting position.
The star has two rotating boards called logarithmic spirals which always cross at right angles, forming a square hole where they intersect.
A challenging puzzle from Hanayama that was upgraded from a level 5 to level 6 back in 2014.
Reviews
There are no reviews yet.