K4
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K4 is a direct solving method designed for the 4x4x4 cube and was created and developed by Thom Barlow.
Contents
Overview
It consist of 7 steps
1. Make 2 opposite centers(use the same 2 colors each time, to get better F3L recognition
2. Make a 3x4x1 Block on your left (roux block) Either pair edges and insert with corners or Block build (efficient and faster)
3. Finish the last four centers
4. Finish the first layer do a z' rotation
5. F3L, no rotations are done. Usually done with a single color(say orange) each time as the F face
6. Do the corners with CLL
7. In 3 Looks solve the K4 ELL using commutators
The first commutator solve 1 edge and places it in place
The next pairs up another one and also places it in place
The third is an algorithm that solves the last 2 dedges and deals with parity.
Unless you get a special case with can be solved in 1 look.
Pros
Pros Efficient Regripless, there's only one valid re-grip, the z' rotation. The solves can be done with less rotations than reduction
Less moves than reduction.
F3L Lookahead is very good and you can get smooth enough to have literally no pauses
Is more efficent than reduction on 5x5
Cons
ELL is hard to get at first, and it takes time to ge used to doing it in 3 looks.
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