| When you finish correctly positioning the edges of the third and fourth layer, your cube will resemble that: |

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1- Edges of the fourth layer:
The 2 formulas presented below are identical to the 5x5x5: they will
descend an edge present on the third layer towards the fourth layer
(fifth layer for the 5x5x5).
Recall: these 2 algorithms were seen in the chapter concerning the edges of the second layer when an edge was badly placed.
Formulate 1:
To move the cube on the left edge of the fourth layer

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In this case, use
following formula:
L D' L' d' L D L' d
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Formulate 2:
To move the cube on the right edge of the fourth layer

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In this case, use
following formula:
R' D R d R' D' R d'
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2 - Edges of the third layer:
This stage, in any more but does not remain you to be made turn the edges of the fourth layer so that they are correctly placed.
If you have chance, it is already done!!!
If you do not have a chance, it will be necessary to make several times the formula suggested.

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Apply the following formula:
B' D' D' R' D R d
R' D' R d' D' D' B
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It is possible that you encounter some particular cases.
A special page to solve them!!!!
Let us pass now in the centers.
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