A solution for beginners and much more
REMEMBER: Before starting any algorithm, make sure that the front (dark grey) face is facing you and the top layer is on the top.
Pairing the Edges
The first part of this process, as with the centres, is more about seeing what is happening rather than learning algorithms.
You can safely rotate any face to create a starting configuration.
Once you have the two matching edge elements in place you will need an unmatched pair on the up face on the side that has the lower layer element of the pair you are about to match.
You will notice that
the pair are matched after the first rotation in the algorithm, however, the
four centres on the side faces have now been split, the rest of the algorithm
places the newly matched pair on the up face then replaces them with the
split pair which are turned to the front face so the side face centres
Continue this process until all the edge pairs bar two are matched.
You might be lucky when you have finish pairing the third last pair with the final two pairs being matched when the centres are realigned, however, this is less likely than still having to match them.
The problem is that we no longer have a third unmatched pair to realign the centres with. So you will need to learn the next algorithm to pair the last two unpaired edge sets.
When the last two pairs are not matched.
This and the two following algorithms have been placed on the page 4x4x4 Disparity Algorithms for quick reference in the future.
When you still have to solve the last two edge elements you do not have a third set to reset the centres with.
The last pair to be solved are placed on ether side of the front face. For the edges to be paired should be on the same layer i.e. they should have the same colour on the front face. If they are not use either of the first two algorithms on this page.
You now have a 3x3x3 cube, however you may still have parity problems.
Cross only has 3 of the 4 bars
The edges you want to flip should be on the top of the front face.
Solved but for the opposite or adjacent edges in the wrong position.
This algorithm solves the cube for Fig.1 and resets the layer to a 3x3x3 solvable configuration for Fig2. In each case an incorrectly positioned pair of edges must be at the top of the front face with a correctly positioned pair at the top of right face.
|© Bob 2003|