How to build and solve a 4D Rubik's cubes in physical 3D (no simulator!)

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I’ve been meaning to make this video about building and solving physical 4D Rubik’s cubes ever since Melinda Green sent me one of her brilliant physical 2x2x2x2s back in 2017! Why did it take so long? Well, this one was especially tricky to get right, and I think it’s probably the video that took me the longest to put together. I really hope you like this one :) 00:00 Intro 03:53 Warm-up 08:59 4d 14:13 Fancy moves 20:24 Solve 26:20 Melinda 31:27 Coding challenge 31:46 What's next? 33:54 Gallery of animations 36:10 Thank you ! (New) Rensley's simulator of the 2d hedgehog https://renslay.itch.