This is a huge version of the Sixth Sense
puzzle ring, meant as big demo model. This six-part puzzle ring is a design by Bram Cohen, and developed by Oskar van Deventer. It is a "size 190", with an inner diameter of 60 mm and an outer diameter of nearly 90 mm. A solution was worked out by Daniel Danzi and D=D=, two puzzle-ring enthusiasts from Virginia, USA.
Watch the YouTube video
Watch the solution video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
Please contact Oskar
directly if you are interested in obtaining a fully colored and assembled sample of this puzzle.