Rubik's Revenge (4x4x4)

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The Rubik's Revenge (aka the Master Cube) has 4x4x4 blocks, making it harder to solve than the original Rubik's Cube. This puzzle was released in 1981 and was actually invented not by professor Rubik himself but by Péter Sebestény.

The most common algorithm for solving the Rubik's Revenge is called the "reduction" method. As implied by its name, this algorithm focuses on solving the 2x2 center pieces and 2x1 edge pieces first - thus "reducing" the problem to a 3x3x3 puzzle, which can be solved exactly like a regular 3x3x3 cube (Except for two parity cases that require further algorithms).

This puzzle has more parts than the Rubik's Cube, thus many more possible permutations. The number of possible permutations of the Rubik's Revenge is over 7.4x10⁴⁵. The Current world record for solving it is 17.42 seconds, and it was set by Sebastian Weyer from Germany at the Danish Open 2019 competition.

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Speedcubemaster

It's so cool but thats not real there are three parity cases because when two corners aren't good you can do a 3x3 t-permutation...

Bl4ck5kull177

Very Hard, I thought that it would be more like solving the 3x3, but it's completely different, very cool, good for people getting tired of repeatedly solving the 3x3, my fastest time on the crunchy rubiks brand 3x3 is 1:13.