Q&A for How to Solve a 4x4x4 Rubik's Cube

Start by familiarizing yourself with the letters assigned to each piece, ensuring you know where each letter is located on the cube. Typically, letters A through X are used, with some individuals substituting Q for Y if necessary. This allows for the creation of letter-based algorithms to solve the cube without visual cues. While mastering blindfolded solving takes time and practice, committing to a consistent letter scheme tailored to your cube can simplify the memorization process. By dedicating yourself to this method and practicing regularly, you can gradually improve your ability to solve a Rubik's cube blindfolded with ease.

If you mean that the second layer is solved except for one piece that is opposite what it should, you would simply follow the algorithm to put another random piece into that location and do it again so that the piece is turned the right way.

Practice a lot! If you haven't already, learn the 3 by 3. It can take lots of time to learn, especially with great speed, but it is possible with daily repetition.

The OLL Parity algorithm is Rw U2 x Rw U2 Rw U2 Rw' U2 Lw U2 Rw' U2 Rw U2 Rw' U2 Rw'.

Make it in a case that it almost looks like the yellow cross that is solved. In this case, use this algorithm: Rw U2 x Rw U2 Rw U2 Rw' U2 Lw U2 Rw' U2 Rw U2 Rw' U2 Rw'.