I put strip of clear tape going over F D B centers including FD and BD edges. now the cube can only be scrambled or solved with LUR moves.
picture of tape on cube
I wrote a scramble generator but it needs work before I can share it. right now it outputs U R L R' L' U' (cancels to 0 moves) or U R L R U (cancels to U R2 L U).
I am working on a complete system that can be used for fewest moves and speed solving. the F2L is almost exactly like CFOP but with less algorithms. I think we do not need a tutorial for F2L. however, after going through the various methods and algorithms found
here, I noticed that the LUR (or FUB rotated to LUR) algorithms do not always exist for each case. I can use multiple algorithms concatenated to get the algorithms I need but they will probably be a lot longer than optimal. M2 D? M2 is allowed but it also is a reduction of R2 L2 U? R2 L2 U?. FUB can be used as is with a setup Dw or d.
any help would be appreciated.