Alternating Cube was suggested by Bram Cohen at the Twisty Puzzles Forum
as follows: "Hey Oskar, can you design a 2x2x2 which must alternate clockwise and counterclockwise quarter turns?".
For the original prototype
, Bram suggested to use the core of Alex Black Hole
as a basis. To this, Oskar added the concept of the Enabler Cube
. One corner, the "enabler", moves through the core in a CW-CCW fashion. The mechanism inside the core pins one of the corners to the core opposite of the "enabler".
Now, there is a new prototype with a new, improved mechanism. The new prototype has a little switch, which enables either only right-handed turns or only left-handed turns. It switches after every turn.
Watch the YouTube video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or contact Oskar
directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.