Dev here. I created a puzzle that looks like Rubik's cube but works differently. Instead of turning faces, closed bands of 12 stickers slide around the cube. Every scramble is solvable. I built on-device AI solvers that solve it in about 60 moves (sometimes substantially less than that) I'm not even a cuber so since I created it I've been thinking that no human can solve it. Until this Thursday when I showed it to r/Cubers. It took them about an hour to find a solution. The first human solve was about 240 moves using mostly (how they call it) 4-move commutators: https://www.reddit.com/r/Cubers/comments/1vrq8zk/ So my belief died, but a better question was born: nobody has a teachable method yet, let alone approaching 60 moves. The link is a 60-second browser demo. The math and the first recorded solve are at skimmiq.com/human-method/. I'm 60, not a professional programmer, and AI helped me create the puzzle and with the heavy math. Happy to answer anything.