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The Professor's Cube (also known as the 5×5×5 Rubik's Cube and many other names, depending on manufacturer) is a 5×5×5 version of the original Rubik's Cube. It has qualities in common with both the 3×3×3 Rubik's Cube and the 4×4×4 Rubik's Revenge , and solution strategies for both can be applied.
The cube restricted to only the corners, not looking at the edges; The cube restricted to only 6 edges, not looking at the corners nor at the other edges. The cube restricted to the other 6 edges. Clearly the number of moves required to solve any of these subproblems is a lower bound for the number of moves needed to solve the entire cube.
A scrambled Rubik's Cube. An algorithm to determine the minimum number of moves to solve Rubik's Cube was published in 1997 by Richard Korf. [10] While it had been known since 1995 that 20 was a lower bound on the number of moves for the solution in the worst case, Tom Rokicki proved in 2010 that no configuration requires more than 20 moves. [11]
Non-human solving: The fastest non-human Rubik's Cube solve was performed by Rubik's Contraption, a robot made by Ben Katz and Jared Di Carlo. A YouTube video shows a 0.38-second solving time using a Nucleo with the min2phase algorithm. [98] Highest order physical n×n×n cube solving: Jeremy Smith solved a 21x21x21 in 95 minutes and 55.52 seconds.
The following are the official speedcubing world records approved by the WCA as of 15 February 2025. [4]Note: For averages of 5 solves, the best time and the worst time are dropped, and the mean of the remaining 3 solves is taken.
In addition, they found that N 1 and N 2 can be used to find three additional solutions from a solution, and that these four solutions are the only four solutions (excluding redundant moves) to the starting given configuration. These four solutions are X, X + N 1, X + N 2, and X + N 1 + N 2 where X is a solution to the starting given ...
In 2013, at the World Rubik's Cube Championship in Las Vegas, NV, Hays placed first in the 5x5, 6x6, and 7x7 events, becoming the first person to win all three events at one world championship. [9] At the 2015 World Championship in Sao Paulo, Brazil , he defended his 6x6 and 7x7 titles, and placed second in the 5x5 event behind Feliks Zemdegs ...
A Tuttminx (/ ˈ t ʊ t m ɪ ŋ k s / or / ˈ t ʌ t m ɪ ŋ k s /) is a Rubik's Cube-like twisty puzzle, in the shape of a truncated icosahedron. It was invented by Lee Tutt in 2005. [ 1 ] It has a total of 150 movable pieces to rearrange, compared to 20 movable pieces of the Rubik's Cube.