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Roux is an efficient, block-building method for solving the Rubik’s Cube with minimal algorithms. It starts with two opposite 1x2x3 blocks, followed by CMLL to solve corners, and LSE to finish the last six edges using M and U moves. This approach optimizes move count while ensuring smooth transitions.
Roux emphasizes lookahead and efficiency, relying on M-slice moves for fast edge solving. While mastering M moves can be challenging, the method offers strong flexibility and control, making it a top choice for solvers aiming to optimize their style.
Step 1: First 2 Blocks
F2B (First Two Blocks) is the first major step in the Roux method, where two 1x2x3 blocks are built on opposite sides of the cube. The first block is usually built intuitively, focusing on efficiency and minimizing unnecessary moves. The second block is constructed without disrupting the first, often requiring more advanced techniques such as blockbuilding, pseudo-slotting, or partial edge control. Efficient F2B execution improves lookahead for the later steps and reduces move count, making it a critical aspect of Roux. Mastering F2B involves recognizing common block patterns, reducing cube rotations, and planning multiple moves ahead to increase fluidity and minimize pauses.
**NOTE** This step is solved using CFOP's F2L pair algorithms, so they are linked instead of block-building algorithms.
First 2 Blocks Tips
Step 2: CMLL
In the Roux method, CMLL (Corners of the Last Layer) is the step where the four top layer corners are solved simultaneously, after completing the first two blocks. This step involves both orienting and permuting the corners in one move using 42 possible algorithms. Unlike CFOP, where CMLL is followed by separate steps for edge orientation and permutation, Roux combines these actions into the CMLL step, making it more efficient. After CMLL, the solver moves on to the LSE (Last Six Edges) step, which involves solving the remaining edges and centers. CMLL plays a crucial role in speeding up the final stages of the solve.
**NOTE** This step is solved using 2x2s CLL algorithms, so they are linked instead of CMLL algorithms.
Step 3: Edge Orientation and Left and Right Edges (EOLR)
EOLR (Edge Orientation and Left and Right Edges) is a step in the Roux method that involves orienting the last layer edges while simultaneously solving the UL and UR edges. This step is done after completing the first two blocks and performing CMLL (Corners of the Last Layer). EOLR can be broken into two parts: first, orienting all the edges of the last layer using only M and U moves, and then positioning the UL and UR edges correctly. This step is crucial for reducing move count and simplifying the final stages of the solve, as it combines two actions into one and sets up the edges for the subsequent L4E (Last 4 Edges) step.
Final Step: Last 4 Edges (L4E)
L4E (Last Four Edges) is the final step in the Roux method, occurring after the completion of the first two blocks and the CMLL (Corners of the Last Layer). It is the easiest step and involves solving the last four edges using just one step with five possible algorithms. In this step, you position the last four edges on the M slice in a very efficient manner. There are only five algorithms to learn, making it a straightforward and quick step, especially for speedcubers. L4E is well-regarded for its simplicity and speed, contributing to the overall low move count and fast solving potential of the Roux method.
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F2B Tips:
Efficient Blockbuilding
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Focus on pairing edges and corners together directly instead of solving them separately.
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Use intuitive blockbuilding rather than relying on preset algorithms.
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Look for efficient ways to insert pieces without disturbing completed parts of the block.
Minimize Rotations
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Avoid y/y’ rotations and try to keep your inspection limited to R, U, and M moves.
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Solve pieces using the M and U layers instead of rotating the cube.
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Get comfortable with solving from multiple angles to maintain fluidity.
Lookahead
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Always track where your next edge or corner will be while solving the current block.
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Use peripheral vision to spot pieces early and avoid pauses.
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Solve pieces in an order that keeps future moves predictable and efficient.
Use the M-Slice Efficiently
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The M slice is one of the most important tools in Roux—practice fast and controlled M moves.
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Use M’ U M tricks to manipulate edge locations instead of relying on rotations.
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Learn to reorient and insert edges using only M and U moves.
Efficient Edge Insertion
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If an edge is flipped incorrectly, use M moves instead of unnecessary rotations.
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Use U moves to set up easier M-slice insertions.
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Recognize when an edge is in the wrong position and fix it efficiently.
Corner Deduction
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If a corner is misplaced, figure out whether it needs to be moved, flipped, or inserted.
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Use U and R moves to adjust corners without disturbing the rest of the block.
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Learn quick corner insertions that minimize unnecessary U moves.
Avoid Unnecessary Moves
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Plan ahead to reduce extra moves while pairing pieces.
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Instead of solving pieces in isolation, try to solve multiple pieces at once.
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Use as few moves as possible to insert pieces into the block.
Work on Both Blocks at the Same Time
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Instead of solving one block fully before moving to the second, plan ahead and look for ways to solve both blocks simultaneously.
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Solve edges in a way that keeps options open for the second block.
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Be flexible—if the second block is easier to start, work on it first.
Use Partial Edge Control
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Instead of fixing edge orientations later, try to preserve good edge orientation while building blocks.
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Adjust the M slice early to avoid unnecessary corrections later in the solve.
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Keep track of edge flips to avoid disrupting solved pieces.
Drill Key F2B Cases
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Identify common cases that occur during blockbuilding and practice solving them efficiently.
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Learn alternative solutions for tricky cases to improve flexibility.
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Do slow, deliberate solves to find move-efficient ways to complete blocks.