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CFOP Method The CFOP Method CFOP Method (Cross – F2L – OLL – PLL), sometimes known as the Fridrich method, is one of the most commonly used methods in speedsolving a 3×3×3 Rubik's Cube. This method was first developed in the early 1980s combining innovations by a number of speed cubers. Czech speedcuber Jessica Fridrich Jessica Fridrich is generally credited for popularizing it by publishing it online in 1997.[1] The method works on a layerbylayer system, first solving a cross typically on the bottom, continuing to solve the first two layers (F2L), orienting the last layer (OLL), and finally permuting the last layer (PLL).Contents1 History 2 The method 3 Competition use 4 References 5 External linksHistory[edit] Basic layerbylayer methods were among the first to arise during the early 1980s cube craze [...More...]  "CFOP Method" on: Wikipedia Yahoo 

Great Dodecahedron In geometry, the great dodecahedron is a Kepler–Poinsot polyhedron, with Schläfli symbol Schläfli symbol 5,5/2 and Coxeter–Dynkin diagram Coxeter–Dynkin diagram of . It is one of four nonconvex regular polyhedra [...More...]  "Great Dodecahedron" on: Wikipedia Yahoo 

Truncated Icosahedron In geometry, the truncated icosahedron is an Archimedean solid, one of 13 convex isogonal nonprismatic solids whose faces are two or more types of regular polygons. It has 12 regular pentagonal faces, 20 regular hexagonal faces, 60 vertices and 90 edges. It is the Goldberg polyhedron Goldberg polyhedron GPV(1,1) or 5+,3 1,1, containing pentagonal and hexagonal faces. This geometry is associated with footballs (soccer balls) typically patterned with white hexagons and black pentagons. Geodesic domes such as those whose architecture Buckminster Fuller Buckminster Fuller pioneered are often based on this structure [...More...]  "Truncated Icosahedron" on: Wikipedia Yahoo 

Dodecahedron In geometry, a dodecahedron (Greek δωδεκάεδρον, from δώδεκα dōdeka "twelve" + ἕδρα hédra "base", "seat" or "face") is any polyhedron with twelve flat faces. The most familiar dodecahedron is the regular dodecahedron, which is a Platonic solid. There are also three regular star dodecahedra, which are constructed as stellations of the convex form. All of these have icosahedral symmetry, order 120. The pyritohedron is an irregular pentagonal dodecahedron, having the same topology as the regular one but pyritohedral symmetry while the tetartoid has tetrahedral symmetry. The rhombic dodecahedron, seen as a limiting case of the pyritohedron, has octahedral symmetry. The elongated dodecahedron and trapezorhombic dodecahedron variations, along with the rhombic dodecahedra, are spacefilling [...More...]  "Dodecahedron" on: Wikipedia Yahoo 

Tetrahedron In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners. The tetrahedron is the simplest of all the ordinary convex polyhedra and the only one that has fewer than 5 faces.[1] The tetrahedron is the threedimensional case of the more general concept of a Euclidean simplex, and may thus also be called a 3simplex. The tetrahedron is one kind of pyramid, which is a polyhedron with a flat polygon base and triangular faces connecting the base to a common point. In the case of a tetrahedron the base is a triangle (any of the four faces can be considered the base), so a tetrahedron is also known as a "triangular pyramid". Like all convex polyhedra, a tetrahedron can be folded from a single sheet of paper [...More...]  "Tetrahedron" on: Wikipedia Yahoo 

Panagiotis Verdes Panagiotis Verdes Panagiotis Verdes is the Greek inventor of the 6x6x6, 7x7x7, 8x8x8 and 9x9x9 Twisty Puzzles. He has also worked on new designs of every Twisty Puzzle from 2x2x2 to 11x11x11.[1] Inventions[edit]The VCube 6 VCube 6 in solved stateThe VCube 7 VCube 7 in solved statePrior to Verdes's invention, the 6x6x6 cube was thought to be impossible due to geometry constraints. Verdes's invention uses a completely different mechanism than the smaller Rubik's cubes; his mechanism is based on concentric, rightangle conical surfaces whose axes of rotation coincide with the semiaxes of the cube.[1] The patents for the cubes were awarded in 2004, and massproduction began in 2008. Verdes's mechanism allows cubes of up to size 11x11x11, as larger cubes have geometrical constraints.[1] References[edit]^ a b c Slocum, Jerry (2009). The Cube: The Ultimate Guide to the World's Bestselling Puzzle [...More...]  "Panagiotis Verdes" on: Wikipedia Yahoo 

Tony Fisher (puzzle Designer) Fisher Fisher is an archaic term for a fisherman, revived as genderneutral. Fisher, Fishers or The Fisher Fisher may also refer to: Fisher (animal) [...More...]  "Tony Fisher (puzzle Designer)" on: Wikipedia Yahoo 

Helicopter Cube A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixedwing aircraft and many forms of VTOL VTOL (vertical takeoff and landing) aircraft cannot perform. The English word helicopter is adapted from the French word hélicoptère, coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix (ἕλιξ) "helix, spiral, whirl, convolution"[1] and pteron (πτερόν) "wing".[2][3][4][5] English language nicknames for helicopter include "chopper", "copter", "helo", "heli", and "whirlybird". Helicopters were developed and built during the first halfcentury of flight, with the FockeWulf Fw 61 FockeWulf Fw 61 being the first operational helicopter in 1936 [...More...]  "Helicopter Cube" on: Wikipedia Yahoo 

Muscle Memory Muscle Muscle memory has been used synonymously with motor learning, which is a form of procedural memory that involves consolidating a specific motor task into memory through repetition. When a movement is repeated over time, a longterm muscle memory is created for that task, eventually allowing it to be performed without conscious effort. This process decreases the need for attention and creates maximum efficiency within the motor and memory systems [...More...]  "Muscle Memory" on: Wikipedia Yahoo 

Pattern Recognition Pattern recognition Pattern recognition is a branch of machine learning that focuses on the recognition of patterns and regularities in data, although it is in some cases considered to be nearly synonymous with machine learning.[1] Pattern recognition Pattern recognition systems are in many cases trained from labeled "training" data (supervised learning), but when no labeled data are available other algorithms can be used to discover previously unknown patterns (unsupervised learning). The terms pattern recognition, machine learning, data mining and knowledge discovery in databases (KDD) are hard to separate, as they largely overlap in their scope. Machine learning Machine learning is the common term for supervised learning methods[dubious – discuss] and originates from artificial intelligence, whereas KDD and data mining have a larger focus on unsupervised methods and stronger connection to business use [...More...]  "Pattern Recognition" on: Wikipedia Yahoo 

Algorithm In mathematics and computer science, an algorithm (/ˈælɡərɪðəm/ ( listen) ALgəridhəm) is an unambiguous specification of how to solve a class of problems. Algorithms can perform calculation, data processing and automated reasoning tasks. An algorithm is an effective method that can be expressed within a finite amount of space and time[1] and in a welldefined formal language[2] for calculating a function.[3] Starting from an initial state and initial input (perhaps empty),[4] the instructions describe a computation that, when executed, proceeds through a finite[5] number of welldefined successive states, eventually producing "output"[6] and terminating at a final ending state. The transition from one state to the next is not necessarily deterministic; some algorithms, known as randomized algorithms, incorporate random input.[7] The concept of algorithm has existed for centuries and the use of the concept can be ascribed to Greek mathematicians, e.g [...More...]  "Algorithm" on: Wikipedia Yahoo 

Cuboid In geometry, a cuboid is a convex polyhedron bounded by six quadrilateral faces, whose polyhedral graph is the same as that of a cube. While mathematical literature refers to any such polyhedron as a cuboid,[1] other sources use "cuboid" to refer to a shape of this type in which each of the faces is a rectangle (and so each pair of adjacent faces meets in a right angle); this more restrictive type of cuboid is also known as a rectangular cuboid, right cuboid, rectangular box, rectangular hexahedron, right rectangular prism, or rectangular parallelepiped.[2]Contents1 General cuboids 2 Rectangular cuboid2.1 Nets3 See also 4 References 5 External linksGeneral cuboids[edit] By Euler's formula the numbers of faces F, of vertices V, and of edges E of any convex polyhedron are related by the formula F + V = E + 2 [...More...]  "Cuboid" on: Wikipedia Yahoo 

Octahedron In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces, twelve edges, and six vertices. The term is most commonly used to refer to the regular octahedron, a Platonic solid Platonic solid composed of eight equilateral triangles, four of which meet at each vertex. A regular octahedron is the dual polyhedron of a cube. It is a rectified tetrahedron. It is a square bipyramid in any of three orthogonal orientations [...More...]  "Octahedron" on: Wikipedia Yahoo 

Icosahedron In geometry, an icosahedron (/ˌaɪkɒsəˈhiːdrən, kə, koʊ/ or /aɪˌkɒsəˈhiːdrən/[1]) is a polyhedron with 20 faces. The name comes from Greek εἴκοσι (eíkosi), meaning 'twenty', and ἕδρα (hédra), meaning 'seat'. The plural can be either "icosahedra" (/drə/) or "icosahedrons". There are many kinds of icosahedra, with some being more symmetrical than others [...More...]  "Icosahedron" on: Wikipedia Yahoo 

Pyraminx Crystal The Pyraminx Pyraminx Crystal is a dodecahedral puzzle similar to the Rubik's Cube and the Megaminx. It is manufactured by Uwe Mèffert and has been sold in his puzzle shop since 2008. The puzzle was originally called the Brilic,[1] and was first made in 2006 by Aleh Hladzilin,[2] a member of the Twisty Puzzles Forum. It is not to be confused with the Pyraminx, which is also invented and sold by Meffert.Contents1 History 2 Description 3 Solutions 4 Number of combinations 5 See also 6 ReferencesHistory[edit]Whitebodied Pyraminx Pyraminx Crystal with a star pattern applied to the faces.The Pyraminx Pyraminx Crystal was patented in Europe on July 16, 1987. The patent number is DE8707783U. In late 2007, due to requests by puzzle fans worldwide, Uwe Mèffert began manufacturing the puzzle. The puzzles were first shipped in February 2008 [...More...]  "Pyraminx Crystal" on: Wikipedia Yahoo 

Skewb Diamond The Skewb Skewb Diamond is an octahedronshaped puzzle similar to the Rubik's Cube. It has 14 movable pieces which can be rearranged in a total of 138,240 possible combinations. This puzzle is the dual polyhedron of the Skewb.Contents1 Description 2 Number of combinations 3 See also 4 External linksDescription[edit] The Skewb Skewb Diamond has 6 octahedral corner pieces and 8 triangular face centers. All pieces can move relative to each other. It is a deepcut puzzle; its planes of rotation bisect it. It is very closely related to the Skewb, and shares the same piece count and mechanism. However, the triangular "corners" present on the Skewb Skewb have no visible orientation on the Skewb Skewb Diamond, and the square "centers" gain a visible orientation on the Skewb Skewb Diamond [...More...]  "Skewb Diamond" on: Wikipedia Yahoo 