Diansheng Magnetized Face Turning Octahedron - Stickerless version

This puzzle is commonly referred to as the "FTO" for short.
Karl Rohrbach filed a patent which was granted as DE3206560 in 1983 but nothing happened afterwards.
Clarence W. Hewlett Jr. filed a patent which was granted as US4451039 but nothing happened afterwards. For a long time, it was thought that the patent covered the Magic Octahedron but this is clearly contradicted by the patent's claim of rotations by 120°.
The first workable mechanism was designed and prototyped (the first working sample) between 2001 and 2003 by David Pitcher. A US patent application was filed in 2003 and allowed in 2005. However, issuance fees were not paid, so the patent was never formalized, and the invention became public domain.
Finally, in 2008 Mr. Shieh (謝宗良) sold the first samples.
The puzzle was very exclusive until the mass-produced version hit the market and became very quickly a standard puzzle every collection should include. This happened because it is the first octahedron (one of the five platonic solids, the most regular solids geometry knows) with one planar cut parallel to every side.
Piece type signature: HC2[F3 E3 X9][]
Before this puzzle there have been:
the Rainbow Octahedron without planar cuts.
the Magic Octahedron which looks like this but twists around its corners and is therefore a derivative of 3x3x3.
the Dino Octa with shallower cuts which never made it into mass production.
the Skewb Diamond, which is deep cut and has fewer pieces.
There has also been the Master FTO, which can be viewed as a) a deep cut plus shallower cut puzzle like a 4x4x4 cube or b) a combination of Skewb Diamond and FTO.
Wiki for puzzles: www.twistypuzz...
#rubik #rubikscube #cubing #twisty #puzzle
#puzzleenigma #enigma #diansheng #ds #face #turning #octahedron #FTO
#David #Pitcher #rainbow #magic #skewb #diamond #Karl #Rohrbach, #Mr #Shieh

[@andreykant]

Very nice puzzle!!! Like this version !!! 👍🔥👍🔥👍

[@puzzleenigma]

Thanks for the visit