![]() ![]() Then rotate the medge back to its original position. Simply rotate the medge that needs flipping into the unsolved layer and perform the double edge flip as described above. ![]() Whatever moves were employed to rotate the flipped medge and position it opposite the flipped bottom edge piece need to be reversed.ĪDDENDUM: If you don't want to wait until later the following occurred to me. This flips the two bottom edges and retains all other positions. Of course, the middle vertical slice is advanced 90 degrees first then between each bottom turn. If the first 4 bottom slice turns were 3 clockwise and one counterclockwise, the next 4 need to be 3 counterclockwise turns followed by a clockwise one. The next 8 reverse the bottom part of the sequence only. Spin the bottom layer until the corner is directly under the piece it needs to replace. The solution is nearly the same as the already explained process. White pieces at the bottom take an extra step. When only 2 edges need flipping I orient them so they are in the bottom opposite one another, one in the bottom front of the cube, the other at the back. You now need to rotate the moved middle edge back into the middle slice and in the process the relocated bottom edge back into the lower slice. All 4 bottom edges are flipped in the process. The 4 vertical center turns are repeated and the bottom turns repeated, 3 one direction and the 4th one back. Then the vertical slice is rotated once more but the bottom slice on the fourth rotation is turned opposite to the previous three times. I then turn the bottom slice 90 degrees causing the lower left corner to move to the lower right. With 4 flipped edges I rotate the middle vertical slice 90 degrees, rotating the bottom edges into the front. I hold the cube so that the top two layers remain on the top. My edge processes basically leave corners alone. This is done to create either 4 flipped edges, in the bottom layer, or 2 flipped edges, opposite one another. ![]() I rotate the medge piece into the final layer and in the process rotate a placed/oriented piece out of the final layer. Once the bottom edge pieces are put in place, either one or three edge pieces are flipped, due to the flipped medge. Once in the last layer I place the corners first then orient them. The case you present is one I no longer solve at this point. I listed processes and their configurations, then tried to reverse them. As a beginner when the cube was first released I kept a notebook. * If you're manoeuvres to swap two corners and twist three corners on your final layer do flip edges, you could use these and their reflections instead: Swap 2 corners: R U' L' U R' U' LĪs a solver my methods are different and constantly evolving. If $3$ edges are flipped on U ($1$ yellow is facing up in your diagram) you could use a "flavour" of a single $11$ face-turn manoeuvre to both flip the edge you are solving and those three: Correct U Edge Sequence If only $1$ edge is flipped on U ($3$ yellows are facing up in your diagram) you could use a "flavour" of a single $9$ face-turn manoeuvre to both flip the edge you are solving and that one: Flipped U Edge Sequence The fact that this edge is flipped and $7$ are not (the ones you've solved) means either $1$ or $3$ of the other $4$ (on the top) are flipped. Finally, you have to insert the last edge with a face rotated 45 degrees (just like you did to take it out).I would suggest starting to look ahead (which you might do earlier than this, but could do here), you know you will want all the top (as you show) edges to have the correct flip, this would be an ideal point at which to start combining your efforts - your method most likely does the corners next, but it is most likely that the manoeuvres you already use do not flip the edges*. Now, put the pieces back in the cube, but this time in the correct position. Once you have taken out an edge, it’s easy to take out the rest of the pieces you need to change. Put a thumb on each edge and make pressure in opposite directions. To take out the pieces of the cube, turn 45 degrees one face (see photo). Therefore, it is advisable to solve most of the cube, so you don’t have to remove and replace so many pieces. In order to fix the cube, you need to take out the pieces that are not properly in place and put them back so that the cube is fully solved. If the piece is now put back in the cube in a different position or orientation, the cube will now be impossible to solve. Most of the times, the Rubik’s Cube becomes unsolvable because someone, intentionally or unintentionally, takes one or more pieces out of the cube. Why there are Rubik’s Cubes that can’t be solved If you’re looking at Rubik’s Cube solutions and your case does not correspond to any of those represented, then your cube in unsolvable. ![]()
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