sneaklyfox
Member
But the problem is that without U' doing the alg the bar will not end up on a face that I will reconize. For example bar is red, but is placed on a blue side. I have no clue now to do a U or U' after doing PLL. If I had learned the alg with U', then I could have known what to do after PLL, simply before starting the PLL by looking where the red side is.
Ok, let me try to explain again by doing the example you mentioned. So, have a solved cube with the red side on the L face and yellow side on U face. Do the J perm alg. Now do a y' because that's how you need it to be before you perform your alg to solve the case. So, bar is on the left, but we actually don't care that the red bar is on the blue face. Now note the 1x2 colour on the F face. It should be orange, on a red side. Orange is opposite red so after your alg you need a U2. I hope this explains it.