2-Gen
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Stands for 2 Generator, an algorithm that uses only two sides or slices of the puzzle.
Sune; R U R' U R U2 R' U2 is a classic algorithm and it is a 2-gen that uses only R and U, the most common sides used in 2-gens for the 3x3x3 cube, but also M and U are common.
The Roux and Petrus 3x3 methods have completely 2-Gen steps. In Roux, the final step is done by turning only the M slice and the U layer, with the exception of the E slice in a special case. In Petrus, the F2L is finished with only R and U turns.
External Links
- Speedsolving.com What are 2-gen algorithms?
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