L2L4 (Last 2 Layers, the 4th proposal)

L2L4 is an experimental 3x3 speedsolving method, the 4th proposal in a series of L2L methods proposed by Duncan Dicks. In this proposal, there is a system for completing the Last 2 Layers in 4 steps. These steps can be arranged however, but are usually referenced by how they affect the last layer. In a beginner layer-by-layer method, once completed the first two layers, one does CO, CP, EO, and EP, in a certain sequence, completing the final layer with these four steps (often combined when a cuber is more advanced/experienced). What 'pure' L2L4 aims to do is to simply build a layer, namely on D, then complete the aforementioned steps all the while completing the four medges (middle-edges).

L2L4 depends on efficient block-building for the First Layer, fast recognition for the four L2L algorithms, decent algorithm execution, and dedication to memorize the required algorithms.

First Layer

Complete a layer (bottom layer shown).

12-14 moves, 4-5 seconds

CO (Corner Orientation)

Solve the FL edge and orient the last-layer corners while preserving the first layer. 56 cases.

~9 moves, 1.5 seconds

CP (Corner Permutation)

Solve the FR edge and permute the last-layer corners while preserving the first layer, the FL edge, and last-layer corner orientation. Do a y2! 30 cases.

~11 moves, 2.5 seconds

EO (Edge Orientation)

Solve the FL edge and orient the last-layer edges while preserving the first layer, the BL and BR edges, and last-layer corners. x cases

~12 moves, 2 seconds

EP (Edge Permutation)

Solve the five remaining edges.

~12 moves, 2 seconds

Total

x algorithms for...

~56 moves