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Cube mid-solve on the OLL step. The CFOP method (Cross – F2L (first 2 layers) – OLL (orientate last layer) – PLL (permutate last layer)), also known as the Fridrich method, is one of the most commonly used methods in speedsolving a 3×3×3 Rubik's Cube. It is one of the fastest methods with the other most notable ones being Roux and ZZ.
And in 2014, Tomas Rokicki and Morley Davidson proved that the maximum number of quarter-turns needed to solve the cube is 26. [3] The face-turn and quarter-turn metrics differ in the nature of their antipodes. [3] An antipode is a scrambled cube that is maximally far from solved, one that requires the maximum number of moves to solve.
Given a transformation between input and output values, described by a mathematical function, optimization deals with generating and selecting the best solution from some set of available alternatives, by systematically choosing input values from within an allowed set, computing the output of the function and recording the best output values found during the process.
The Rubik's clock is listed as one of the 17 WCA events, with records for fastest time to solve one puzzle, and the fastest average time to solve 5 puzzles (discarding the slowest and fastest times). The puzzle is unique in the WCA in that it is the only puzzle for which viable speedsolving methods have been devised that always solve it in God ...
For most events, an average of five is taken, but for 6×6×6, 7×7×7, 3×3×3 blindfolded, 3×3×3 fewest moves, 4×4×4 blindfolded and 5×5×5 blindfolded, an average of three is taken. For averages of five solves, the best time and the worst time are dropped, and the mean of the remaining three solves is taken.
Additionally, specialized formats such as 3×3, 4×4, and 5×5 blindfolded, 3×3 one-handed (OH), 3×3 Fewest Moves, and 3×3 multi-blind are also regulated and hosted in competitions. [ 1 ] As of February 2025, the world record for the fastest single solve of a Rubik's cube in a competitive setting stands at 3.08 seconds.
Feliks Aleksanders Zemdegs [1] (/ ˈ f ɛ l ɪ k s ˈ z ɛ m d ɛ ɡ z /, Latvian: Fēlikss Zemdegs; born 20 December 1995) is an Australian Rubik's Cube speedsolver.He is one of only two speedcubers ever to win the World Cube Association World Championship twice (the other being Max Park), winning in 2013 and 2015, and is widely considered the most successful and greatest speedcuber of all time.
Given a system transforming a set of inputs to output values, described by a mathematical function f, optimization refers to the generation and selection of the best solution from some set of available alternatives, [1] by systematically choosing input values from within an allowed set, computing the value of the function, and recording the best value found during the process.