Rubik's cube twisty puzzles. Far beyond the original 3x3x3 cube, which I've known for years. There's been a boom lately in newly designed puzzles of pretty mu

Rubik's cube twisty puzzles. Far beyond the original 3x3x3 cube, which I've known for years. There's been a boom lately in newly designed puzzles of pretty much every polyhedral shape you can imagine. It feels amazing to deeply grasp the mathematics of them and see patterns in generalizing and applying techniques from one puzzle to new variations. Here's some recent examples: http://www.mefferts.com/products/details.php?lang=en&category=13&id=171 http://www.mefferts.com/products/details.php?lang=en&categor... http://www.mefferts.com/products/details.php?lang=en&category=13&id=327 http://www.mefferts.com/products/details.php?lang=en&categor... http://www.mefferts.com/products/details.php?lang=en&category=13&id=397 http://www.mefferts.com/products/details.php?lang=en&categor... Best community site: the forums on http://www.twistypuzzles.com/ http://www.twistypuzzles.com/