Big NxNxN Cubes (6x6x6, 7x7x7, …)
The best Big Rubik’s Cube-type puzzles are manufactured by Shengshou or the Greek Verdes Innovations SA (V-Cube by Panagiotis Verdes). They turn relatively smooth taking into account that we’re talking about such a complex mechanism. In this article we are going to present the solution of the NxNxN Big cubes.
We have to divide NxNxN cubes in two big groups: even and odd layered puzzles. On the odd versions like a 7x7x7 there is a fixed centre piece which determines the colour of each face, but the even cubes like the 6x6x6 don’t have one and you have to determine the colour schame of the cube according to the colours of the corner and edge pieces. If you can solve a 6x6x6 and a 7x7x7 cubes then you can solve any NxNxN Rubik’s-type puzzle it is just more time consuming.
The number of permutations of a 5x5x5 Professor’s Cube is close to the estimated amount of atoms in the Universe. We can’t find nothing to illustrate how big this number is in the case of a 7x7x7 cube. The number we’re talking about is approximately 1,95 x 10160 (or 19.5 sexvigintilliard). That’s pretty much, isn’t it?
Especially the V-Cube 7 became famous being the first mass-produced multi-layered Rubik’s Cube and it’s easily recognisable by its pillowed shape. Many versions have been made by Verdes Innovations, like two-coloured cubes, flag cubes (Danemark, Sweden, Finland), or the 7-coloured V-Cube Dazzler which has no stickers, just coloured pieces with white centre and corner pieces.
The solution of an NxNxN cube
You can read about the notation of the big cubes on this page.
While solving a 7x7x7 cube using the 5x5x5 technique you can reach a point where every centre piece is solved except the outer pieces of the last two centre blocks and this is where you might need an algorithm. This is how you do it when the pieces we want to swap (highlighted on the image) are on the front and up sides:
3R’ F’ L2 – F 3R F’ L2‘ – 3R refers to the rotation of the third right layer, while L2 is a deep cut turn.