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3x3x3 BLD with M2 and Old Pochmann

Introduction

We decompose solving a 3x3x3 blindfolded into the following steps:

  1. Memorize the corners
  2. Memorize the edges
  3. Solve the edges
  4. Solve the corners

There are two major blindfold methods, we introduce M2/OP here. The alternative is 3-style.
Both methods share the same memorization (except for buffer piece difference), but differs in execution.
M2/OP is relatively easier to learn. 3-style is conceptually easy but harder to ensure correctness and keep track of the setup/reverse moves.

Edge

We made the tutorial interactive, where you may specify your letter scheme for edge/corner.

Up

Left

Front

Right

Back

Down

Memo

You start from the buffer center (Ubl), and construct cycles. Append small cycles when you need to.

We group center memo into pairs of letters.

The last group could be a single group, called edge parity.

Execution

For each pair letter_1 and letter_2, we execute algorithm for letter_1, add M2, reverse; then algorithm for letter_2, add M2, reverse.

In case the last memo is a single letter, we execute the parity algorithm D' L2 D M2 D' L2 D.

Most setup and reverse are intuitive, so we omit most of those, and only shows a few (marked without special).

Note that if you see

Algorithms

Corner

Memo

Memo is similar to corner.

Start with the buffer piece ULB.

We group wing memo into pairs of letters.

The last group could be a single group, called corner parity.

Execution

For each pair letter_1 and letter_2, we execute algorithm for letter_1, add M2, reverse; then algorithm for letter_2, add M2, reverse. If you see a special algorithm, just apply the algorithm and the M2 slice will be included in that special algorithm.

Since during edge solution, we already handled parity at the last, just execute the algorithm for that final letter, and the cube will be solved.

There is only one algorithm for OP method.

Always setup your corner to RFL piece, apply the corner swap algorithm and reverse the setup.

The corner swap algorithm is:

R U' R' U' R U R' F' R U R' U' R' F R