I have trouble with that edge. Please give algorithm or images for solutions for turning it up so that I can form a cross.
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$\begingroup$ If you truly want to understand the cube and other permutation puzzles, you need to learn commutators, as explained in this post. Then it is obvious that this is a singe pair swap, which needs a parity fix (e.g. quarter slice turn), after which you have a 5-cycle on the edges and you can also find a 5-cyle on centre-pairs, and each 5-cycle is easily solved using 2 commutators. Of course there are shorter solutions, but they are ad-hoc and require memorization. $\endgroup$– user21820Nov 3, 2021 at 11:40
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2 Answers
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The algorithm is
$r \ U^2$ - X - $r \ U^2 \ r\ U^2 \ r' \ U^2\ l \ U^2 \ r' \ U^2\ r \ U^2\ r' \ U^2\ r'$
Where $r$ means you have to turn two layers from the right upwards and $r'$ means downwards, $l$ means you have to turn two layers from the left downwards. and x means you have to turn the whole cube one face upwards.
Initial
$rU^2$
$\times$ one face up
$rU^2$
$rU^2$
$r'U^2$
$lU^2$ remember left down!
$r'U^2$
$rU^2$
$r'U^2$
$r'$
Now you can solve the top layer.
For explanation : https://www.youtube.com/watch?v=h6EUHMQ71nA
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Better answer here: https://www.speedcube.us/blogs/speedcubing-solutions/4x4-oll-parity-algorithms
OLL Parity Algorithm 2: r', U2, l, F2, l', F2, r2, U2, r, U2, r', U2, F2, r2, F2
Flips the edge and only the edge. Nothing to solve after that.
