Speedcubing (also known as speedsolving, or just cubing) is a sport involving solving a variety of combination puzzles, the most famous being the 3x3x3 puzzle or Rubik's Cube, 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 considered solved, such as the Clock, for which all the dials must be moved into the 12 'o clock position.[1] The standard puzzle sizes are 2x2x2, 3x3x3, 4x4x4, 5x5x5, 6x6x6, and 7x7x7 and the different variations of speed solving, 3x3x3 one-handed, 3x3x3 blindfolded, 4x4x4 blindfolded, and 5x5x5 blindfolded. There are also different shapes of the famous puzzles, including Pyraminx, Megaminx, Skewb and Square-1. An individual who competes in speedcubing is known as a speedcuber.