Professor's Cube vs Square-1

The Professor's Cube is a 5×5×5 mechanical puzzle invented by Udo Krell in 1981, expanding the original Rubik's Cube concept with 98 movable components. Manufactured by Ideal Toy Corporation, it was the first mass-produced 5×5×5 twisty puzzle, presenting a greater challenge than standard 3×3×3 cubes. Unlike the original Rubik's Cube, the Professor's Cube requires solvers to align not just the colo...

Square-1, also known as Cube 21, is a shape-shifting twisty puzzle invented in Czechoslovakia by Karel Hršel and Vojtěch Kopský and released commercially in 1990. Unlike standard 3×3×3 cubes, its mechanism allows the three layers to be cut at varying angles, causing the puzzle to deform into non-cubic polyhedral shapes when scrambled. Solving requires returning the pieces to a cube shape and then...