GoKawiilPuzzle theorist proves Flat Cube requires at least 27 moves to solve worst-case scrambles
A mathematician analyzing a flattened variant of the Rubik's Cube—dubbed the 'Flat Cube,' made of rhombus-shaped pieces that twist in hexagonal clusters—has proven a lower bound for its version of God's Number. Using two geometric proof techniques, one adding a dimension and one removing one, the author demonstrates that at least 27 twists are required to solve the puzzle's most difficult scrambles, regardless of whether moves are counted in 60-degree increments or as single rotations of any angle.