1) Mechanical puzzle
Found on
https://www.crosswordclues.com/clue/speedcubing
Speedcubing (also known as speedsolving) is the activity of solving a Rubik`s Cube or related puzzle as quickly as possible. For most puzzles, solving entails performing a series of moves that alters a scrambled puzzle into a state in which every face of the puzzle is a single, solid color. Some puzzles have different requirements to be considere....
Found on
http://en.wikipedia.org/wiki/Speedcubing
No exact match found.
