Rubik's Cube Scramble Generator

How Cubeathon generates scrambles

Scrambles come from cubing.js, an open-source cubing library, running in the background of your browser. Where it is practical the scramble is random-state: the generator picks a random position of the puzzle first and then finds a move sequence that reaches it, so every position is equally likely. That is how the 2×2, 3×3, 4×4, Pyraminx, Skewb and Square-1 are scrambled.

For the 5×5, 6×6, 7×7 and Megaminx there is no practical way to do that, so the scramble is a long sequence of random moves; the Clock gets a random number of hours on every dial move. Both follow the approach the WCA takes for those puzzles. These are WCA-style practice scrambles: official competitions generate theirs with the WCA's own program.

If the generator can't load (for example, offline before you've used a puzzle once), Cubeathon falls back to a simpler built-in generator for that puzzle, so you always get a usable scramble.

Scramble generators for every puzzle

Each puzzle has its own page, with its notation explained and tips for practising it.

• 3×3 scramble generatorRandom-stateAbout 20 moves · Average of 5 at WCA competitions
• 2×2 scramble generatorRandom-stateAbout 11 moves · Average of 5 at WCA competitions
• 4×4 scramble generatorRandom-stateAbout 45 moves · Average of 5 at WCA competitions
• 5×5 scramble generatorRandom-move60 moves · Average of 5 at WCA competitions
• 6×6 scramble generatorRandom-move80 moves · Mean of 3 at WCA competitions
• 7×7 scramble generatorRandom-move100 moves · Mean of 3 at WCA competitions
• Pyraminx scramble generatorRandom-stateAbout 11 moves including tips · Average of 5 at WCA competitions
• Skewb scramble generatorRandom-state11 moves · Average of 5 at WCA competitions
• Megaminx scramble generatorRandom-move7 rows of 11 moves (77 in total) · Average of 5 at WCA competitions
• Square-1 scramble generatorRandom-stateAbout a dozen / slices · Average of 5 at WCA competitions
• Clock scramble generatorRandom dials14 dial moves plus y2 · Average of 5 at WCA competitions

How to use a scramble

1. 01

   Start from solved

   Hold a solved puzzle in the scramble's starting orientation. For cubes that is white on top and green in front.

2. 02

   Apply every move in order

   Read left to right, slowly. Accuracy matters more than speed here.

3. 03

   Check the result

   Compare with the preview, or replay the scramble move by move on a cube to find a missed turn.

4. 04

   Inspect, then solve

   Open the timer on the same scramble, use the 15 seconds of inspection, and solve.

New to the letters in a scramble? Learn cube notation on an interactive cube, or see how to read a scramble.