So, I almost finished a rubik’s cube, but the last 3 pieces are not in their places (green on red face, blue on green face, and red on blue face). Apart from these, the other faces are done.
How can I finish solving the cube?
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2$\begingroup$ This was closed as a duplicate of a question about a situation where just two cubelets were swapped. It is not a duplicate of that question; here the permutation is a 3-cycle. I've reopened it. $\endgroup$– Gareth McCaughan ♦Apr 29, 2019 at 16:09
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1 Answer
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If the three edge pieces you want to rotate are on the top layer at front, left and right, then the move $F^2UM^{-1}U^2MUF^2$ will permute them cyclically where $F$ means rotating the front face $90^{\circ}$ clockwise (so $F^2$ means rotating it $180^{\circ}$), $U$ means rotating the top (upper) face $90^{\circ}$ clockwise, and $M$ means rotating the vertical "middle slice" perpendicular to the front face $90^{\circ}$ towards you. See here for an animation.
This will move front $\rightarrow$ left $\rightarrow$ right $\rightarrow$ front which is actually the reverse of the direction you want; so either do it twice or do it backwards meaning $F^2U^{-1}M^{-1}U^2MU^{-1}F^2$. (Take the steps in reverse order, inverting each one, noting that e.g. $F^2$ is its own inverse.)
answered Apr 27, 2019 at 20:40
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$\begingroup$ Thank you!I solved the cube without help,but thanks for sharing a few minutes to help me!I really appreciate it!I forgot an essential detail:after finishing the second layer i forgot to make sure i have the second square on the third layer on their right faces(that's after i made the yellow cross).And right after that i did the R algorithm for every unfinished corner and that's it.I had the cube solved for the first time conscious. $\endgroup$ Apr 29, 2019 at 15:57
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$\begingroup$ @AdrianU. Tip: Use the check mark under the voting buttons to mark Gareth's answer as accepted. $\endgroup$ Apr 29, 2019 at 20:04