Speedcubing ( from English- speed, German: speed and english cube, German: Dice ) refers to the ability of a (usually 3 × 3 × 3) Rubik's Cube (English Rubik 's Cube ) to solve in the shortest possible time, ie, in the condition that all sides are colored in their respective color bring to. Besides the classic 3 × 3 × 3 variant, there are many other variations, for example, 2 × 2 × 2, 4 × 4 × 4 5 × 5 × 5 6 × 6 × 6 7 × 7 × 7 or other non - cube-shaped versions (eg pyramidal ).
For the release of the cube there are many different ways in which not everyone is suitable for speed cubing. There are broadly speaking the one methods based on knowing a few algorithms, and to repeat this very often, on the other hand, there are methods in which little moves are necessary, but many algorithms and special cases have to be learned by heart. Of course the latter are for the Speedcubing of relevance. The two most popular methods are under Speedcubern developed by Jessica Fridrich in the 1980s called Fridrich Method, which is now used by most Speedcubern and developed by Lars Petrus Method.
Also developed by Gilles Roux method, the Roux Method, ever higher in popularity because it has many steps and thus less intuitive algorithms and fewer trains needed as, for example, the Fridrich method.
Roux method and Fridrich method are so far the only methods which formally an average of less than ten seconds was achieved. However, most speedcubers use the already longer existing Fridrich method.
There are various national and international competitions with well-defined rules and disciplines.
After the cube was rotated controlled by the officials ( judges ), the speedcubers must take the cube for 15 seconds in hand and inspect. The inspection period does not count for the solution time. Thereafter, the dice must be stored and both hands are placed on the table. When the inspection takes longer than 15 seconds, the Solve counts ( solved cube ), 2 seconds. Does the Cuber longer than 17 seconds to inspect the cube is the Solve invalid ( DNF = Did not finish). The time starts when the hands are lifted from the table. In order to measure the time exactly, so-called stack - timer can be used. Is a side after Solve rotated by 45 ° after the die has been achieved, 2 seconds are also added. Are there two trains needed to solve the cube, it counts as a DNF.
The field of Speedcubings includes several disciplines involving all matters it to the required time:
- Loosen with two hands (the " normal" speed cubing )
- Loosen with one hand (One Handed )
- Solve with the feet
- Solve blindfolded ( Blindfold Cubing )
- Solve as many 3x3 Rubik's Cube blindfolded (multi blind)
- Loosen with as few moves ( Fewest Moves )
- 4 * 4 * 4 cube ( Rubik 's Revenge )
- 5 * 5 * 5 cubes (Professor 's Cube )
- 6 * 6 * 6 - cube
- 7 * 7 * 7 cubes
- Square -1
- Rubik 's Clock
On 1 January 2013 the following events have been removed from the list of official disciplines:
- Rubik's Magic
- Rubik's Master Magic
Unofficial record lists also list some unusual disciplines, including the following:
- Solving on a bicycle
- Solving on a roller coaster
- Release when diving
- Solving in a state of drunkenness
- Solving in free fall ( Freefall Speedcubing )
- Solve a handstand
- Solve without inspection
The fastest solution to the Rubik's Cube ( 3 × 3 × 3) by a robot constructed by the British abolished the Mike Dobson and David Gilday CubeStormer 3 on 15 March 2014 in 3.253 seconds.