# Difference between revisions of "LSE"

 LSE Information Proposer(s): Gilles Roux Proposed: 2003 Alt Names: Last Six Edges, L6E Variants: ELL, L5E Subgroup: No. Algs: unknown Avg Moves: Purpose(s): Speedsolving Previous state: 6 Edges missing UM cube state Next state: Solved cube state
 The LSE step is the step between the 6 Edges missing UM cube state and the Solved cube state.

LSE, also called L6E, short for Last Six Edges, is a possible last step in 3x3 speedsolving that solves the M-slice centers and edges (UF, UB, DF, DB) together with UL and UR edges. It is the last step of the Roux Method and the Ortega Method.

## Possible approaches

LSE can be solved in various ways; Gilles Roux himself, the inventer of the Roux Method, advocates a flexible/semi-intuitive approach to LSE without a strict division into substeps. The optimal approach is likely a combination of the approaches below.

Layers-based approach

• 1. centers, BD, and FD
• 2. ELL

This layer-based approach seems out of place in any method ending with LSE.

Original Roux

• 1. Orient centers and edges
• 2. Permute UR and UL edges
• 3. Permute the M slice

The following two approaches are commonly used in Corners first methods.

Corners First approach 1

• 1. Solve UL or UR
• 2. Insert UL/UR while orienting the M slice
• 3. Permute the M slice

Corners First approach 2

• 1. Solve both UL and UR
• 2. Orient and permute the M slice

Reduction to L5E has been proposed as an experimental approach.

L5E

• 1. Centers and BD
• 2. L5E