Irreversible Cube looks like a regular 2x2x2 Cube. However, there are many constraints in this puzzle toy. Only clockwise quarter turns are allowed, after a turn on one axis (out of three), the next move, if any, will need to be done on another axis. Obviously, it is not a standard twisty puzzle as you cannot simply reverse your move sequence. You must really be able to first analyze the mechanism of this puzzle toy. First, the turning face locks itself against turning back to it original position. From this point, one can only move forward. Next, the turning face unlocks the previously locked adjacent face. Then, the turning face locks itself against turning back to the adjacent-faces-unlocking state. Finally, the turning face blocks. Now it can only be unlocked by turning an adjacent face.
Just a friendly reminder, the puzzle has no easy undos. Once a quarter turn clockwise has been made, one cannot undo it by turning anti-clockwise. Anti-clockwise turns are blocked by the mechanism. There are only single clockwise quarter turns, and any second quarter turn is blocked, only to be unlocked when another face is turned 90-degrees clockwise. You can purchase this extremely mind boggling puzzle toy at Puzzle Master.
Thank you so much Oskar for allowing us to use your videos. If you would like to see more of Oskar’s videos, go to Oskar’s YouTube Channel. Copyright (c) 2013, M. Oskar van Deventer.