Common blind twisting methods for the third-order Rubik's Cube include the block-by-block method, the four-step method, the two-step method (the "step-by-step" method, known as the "Freestyle BLD method" in foreign countries), and the M2 method. The step-by-step method is a solution for third-order blind screwing, and the idea is to use the principle of the three cycles to restore the color direction and position of two blocks at once, in two steps: corner block restoration and prism block restoration. According to this, it belongs to the category of two-step method.
The step-by-step method was originally developed by Row, improved by Roundy, and organized by Ichiyo to form a complete set of methods.
The following tutorial is different from Ichiyo's Step-by-Step tutorial in that the main difference lies in the parity processing. In the Step-by-Step tutorial, parity is processed first, and then prisms are recovered, but in this tutorial, the parity processing is put at the end.
That is to say, in the following tutorial, the whole recovery process is as follows:
Prism encoding-> corner encoding-> corner recovery-> prism recovery-> parity (the order of the corner blocks and prisms can be according to your personal habits, and whether there is parity or not is determined by the situation). by.a leaf to know the autumn
< M2 method and the four-step method combined with the blind screwing method >
I. Blind screwing ideas: prism block with the M2 method (color direction and change position synchronously completed, in which the M layer of the four prongs color direction to stay in the prongs after the change of the position of the color and then turn the color) Corner block on the use of the four-step method of the two-step (the first turn the corner block color direction, and then change the position of the corner block) Parity check (in the method. Because the prism blocks are fixed DF and UB need to be swapped, the four PLL formulas used are all involved for the prisms! First make F2 to flip the UB prism block to the top, then flip the corner blocks, up to 4 steps! (<; this step is omitted when there is no parity in the prongs >;) 2. Memory sequence: encode prongs (M2 method) (taking into account whether there are prongs to be flipped and whether there is parity); encode the corner block position; encode the corner block direction. Third, restore the order: corner block direction; corner block position (need to parity check on the remaining two corner blocks; prongs; individual prongs flip color; parity check (②, ③ two steps according to personal habits can be switched to the order of operation, and the last ④, ⑤ two steps may be omitted at times)
Fourth, the definition: on the following is a high-level surface; before and after the intermediate surface; left and right surfaces for the low-level surface; the upper and lower color is a high level of color; Front and back color for intermediate color; left and right color for low-level color; color priority still follows the principle of high-level > intermediate > low-level. V. Coding: Corner Block Coding Corner Block Upper Front Left
UFL Upper Left Back
ULB Upper Back Right
UBR Upper Right Front
URF Lower Left Front
DLF Lower Back Left
DBL Lower Right Back
DRB Lower Front Right
DFR No. 123456782) Prism Block Coding Prism Block Color Direction Correct Numbering Prism Block Color Direction Incorrect Numbering Prism Block Color Direction Correct Numbering Prism Block Color Direction Incorrect Numbering Upper Front UF A Front Upper FU B Upper Left UL C Upper Left LU D Upper Rear UB E Rear UB E Rear UB F Upper Right UR G Upper Right RU H Upper Front DF I Upper Front FD J Upper Left DL K Upper Left LD L Upper Rear DB M Upper Rear BD N Upper Right DR O Upper Right RD P Upper Right FR Q Upper Right RF R Upper Left FL S Left front LF T Back left BL W Left back LB X Back right BR Y Right back RB Z