In this case, the correct set of moves would be R U’ R’ which places the solved edge in the top layer and preserves the centre positions). There are 21 defined PLL cases – These are cases that can appear on a 3x3 cube, there are no more combinations of pieces. The original puzzle has been expanded outwards to create bigger and more challenging alternatives: the 4x4, 5x5, 6x6 and 7x7. Next, construct another bar of the same colour, but make sure that this one has two corner centres and one inner centre. Since the release of the original Rubik’s Cube, people have been striving to create new and harder twisty puzzles.

A simpler way involves performing a PLL algorithm that you do know until you’re left with the obvious confirmation that you have parity – Two adjacent edges are swapped or two opposite edges are swapped, and the rest of the puzzle is solved.

Some have changed the shape completely from a cube to a cuboid (and various other shapes), some have only seen simple sticker modifications. For more examples or to see this in action please set the scramble length to 1 for a 11x11x11 cube and do some scrambles.

The first centre can be made by connecting two pieces together (in fact, most of the time there will already be one of these 1x2 “bars” solved on your cube due to the limited amount of possible centre combinations). Using only outer layer moves, the 4x4 can be solved just like a normal 3x3 cube – Building the cross, then pairing corners and edges to insert them (F2L), orienting the last layer pieces ( OLL) and permuting them to finish ( PLL). If you don’t have any pairs of 2 pieces matching, do a few Uw moves until you notice that two match, flip them to preserve them and undo the Uw moves. You will have noticed that, now each edge has been solved and the centres have been separated, the cube resembles a big 3x3. As shown in Figure 1, an edge has been made by slicing across to match up two pieces (to align two pieces, simply insert the matching piece like an F2L pair using R U’ R’ moves).Combinations: 157 152 858 401 024 063 281 013 959 519 483 771 508 510 790 313 968 742 344 694 684 829 502 629 887 168 573 442 107 637 760 000 000 000 000 000 000 000 000 (1. Next, you can put your now solved centres on the left and right of the puzzle and solve two more adjacent centres. e. if the centre to the left of red with yellow on top must be blue), or the cube will not be solvable.