Step6. Last edges at top layer.

There seem a lot of algorithms in following steps, but most of the algorithms are variations of an algorithm.

6-1. First edge.

You can position one edge by the same technique as 3x3x3.

ex. i) Position a: (lr')D2(l'r) or Position b: (lr')D'(l'r) (corrected 8/24/2002)

    ii) Position a: (lr')D2(l'r) or position b: D'(lr')D2(l'r) (corrected 8/24/2002)

   iii) Position a: D(lr')D'(l'r) or Position b: D2(lr')D(l'r) **I prefer U face of second edge on side.

******If top edges are positioned before inner cubes are positioned.

ex. ruLu'r'uL'u'

6-2. Second edge. You can make pair of edges on D layer, when you position the second edge on U.

i)bU'b'DbUb'
   If you regrip R=front, U=Left, F=Down, uL'u'RuLu'R'.

ii)R2U'b'DbUb'D'bR2
   If you regrip R=front, U=Left, F=Down, F2-L'u'RuLu'R'u-F2. (Corrected July2003, Thanks Koryu)

iii)rlB2l'F2lB2l'F2r'
   I usually regrip D=front, B=Left, R=Down, d-uL2u'R2uL2u'R2-d'.

iv)D'F'-L'u'RuLu'R'u-F

v)D'F'(Bb)-L'u'R'uLu'Ru-f' (corrected 8/24/2002) *Attension: direction of L and R is not like usual.

i)l-bU'b'D'bUb'D-l'
   If you regrip R=front, U=Left, F=Down, b-uL'u'R'uLu'R-b'. *silimar to previous one. (corrected. Thanks Koryu)

ii)R2l-U'b'D'bUb'Db-l'R2
   If you regrip R=front, U=Left, F=Down, F2b-L'u'R'uLu'Ru-b'F2.

iii)r-F2lB2l'F2lB2l'-r'
   I usually regrip D=front, B=Left, R=Down, d-R2uL2u'R2uL2u'-d'.

iv)D'Ff'-d'L'dR'd'LdR-F'f

v)F2rB2r'F2rB2r' or D'F-d'L'dRd'Ld-R'F' 

***If the orientation of middleedges is wrong, you may see this pattern.

(r2R2)(u2d2)(r2R2)