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| Do you know the world record for solving a Rubik's Cube fastest? It is only 3.47 seconds. Too fast! Well, I am sorry if someone expects a speech about speedcubing, because I will now introduce some Rubik's Cubes which have interesting shapes.
| | すべてが透明だった。空間はただ茫然と立ちすくみ、そこには静寂さえなかった。まっさらなキャンバスに躍る白も、深宇宙をたたえる夜暗の黒も、その不可視のガラス張りの前では、不在を象徴するに値しない。 |
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| But first, I will introduce the most known, basic 3x3x3 cube. It was designed by Rubik Ernő, a Hungarian professor of architecture. Soon after the release, this attractive three-dimensional puzzle became very popular all over the world. So a few years later, a new Rubik's Cube designed more difficult followed it. This one was a 4x4x4 cube, called "Rubik's Revenge."
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| More and more complex and large Rubik's Cubes have appeared one after another since then. A 5x5x5 cube called "Professor’ Cube," then 6x6x6, 7x7x7... Okay, The largest Rubik's Cube that really exists today is the 33x33x33 cube, which is created by a French designer named Grégoire Pfennig and listed in Guinness World Records as such.
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| On the other hand, there is a simpler one: 2x2x2 cube called "Pocket Cube." In fact, this cube is not a child of the Rubik's Cube. It was created by an American chemist named Larry D. Nichols, before Rubik Ernő developed the Rubik's Cube.
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| Some types of Rubik's Cubes are no longer "cubes." For example, this is a tetrahedron-shaped Rubik's Cube called "Pyraminx," created by a German designer named Uwe Mèffert. There are a variety of other geometric shapes, such as "Decamynx" in the form of a dodecahedron, "Dogic" in the form of an icosahedron, and even "Rubik's Sphere" in the form of the very sphere.
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| Other types of Rubik's Cubes are also no longer "cubes," in terms of dimension. Those cubes exist in virtual space, not in reality. This is because they are not three-dimensional objects. Please look at this 4D Rubik's Cube. Too strange! I have no idea how to handle this, much less how to solve this. There are also a 5D cube, then 6D, 7D... However, the most interesting one among the non-three-dimensional Rubik's Cubes is, I think, this two-dimensional "Rubik's Square."
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| Like this, there are many Rubik's Cubes that have interesting shapes. Looking at the 3x3 cube now, doesn't it look so easy? If you think so, why not challenge a Rubik's Cube? Thank you for listening.
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