R2 U R U R' U' R' U' R' U R'. Ub - Probability = 1/18. R U' R U R U R U' R' U' R2. Ua - Probability = 1/18. M' U M2 U M2 U M' U2 M2. Z - Probability = 1/36.PDF | In this paper, the performance assessment of three software single-phase phase-locked loop (PLL) algorithms is carried out by means of dynamic | Find PLL (Permutation of the Last Layer) solves the cube after OLL. This is the last step of the CFOP method. Note: Recognize G perms with headlights (solved corners) Solving the PLL is the last step of the CFOP, and is the final straight in speedsolving the Rubik's cube. There are 21 different variations of Last Layer PLL Algorithms (Permutation of Last Layer). Developed by Feliks Zemdegs and Andy Klise. Algorithm Presentation Format. Suggested algorithm here. This document contains a list of every PLL algorithm that Yuxuan uses for normal 3x3 solves with a short description of how she learned/remembers/recognizes