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  2. Combination puzzle - Wikipedia

    en.wikipedia.org/wiki/Combination_puzzle

    The Sudoku Cube or Sudokube is a variation on a Rubik's Cube in which the aim is to solve one or more Sudoku puzzles on the sides or rows. The toy was originally created in 2006 by Jay Horowitz in Sebring, Ohio. It was subsequently produced in China, marketed and sold internationally. A scrambled colorless Sudoku Cube

  3. Sudoku solving algorithms - Wikipedia

    en.wikipedia.org/wiki/Sudoku_solving_algorithms

    Sudoku solving algorithms. A typical Sudoku puzzle. A standard Sudoku contains 81 cells, in a 9×9 grid, and has 9 boxes, each box being the intersection of the first, middle, or last 3 rows, and the first, middle, or last 3 columns. Each cell may contain a number from one to nine, and each number can only occur once in each row, column, and box.

  4. Sudoku - Wikipedia

    en.wikipedia.org/wiki/Sudoku

    Also, a Sudoku version of the Rubik's Cube is named Sudoku Cube. Many other variants have been developed. [24] [25] [26] Some are different shapes in the arrangement of overlapping 9×9 grids, such as butterfly, windmill, or flower. [27] Others vary the logic for solving the grid. One of these is "Greater Than Sudoku".

  5. Rubik's Cube - Wikipedia

    en.wikipedia.org/wiki/Rubik's_Cube

    The Rubik's Cube is a 3D combination puzzle invented in 1974 [ 2][ 3] by Hungarian sculptor and professor of architecture Ernő Rubik. Originally called the Magic Cube, [ 4] the puzzle was licensed by Rubik to be sold by Pentangle Puzzles in the UK in 1978, [ 5] and then by Ideal Toy Corp in 1980 [ 6] via businessman Tibor Laczi and Seven Towns ...

  6. Mathematics of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_Sudoku

    Mathematical context. The general problem of solving Sudoku puzzles on n2 × n2 grids of n × n blocks is known to be NP-complete. [8] A puzzle can be expressed as a graph coloring problem. [9] The aim is to construct a 9-coloring of a particular graph, given a partial 9-coloring. The Sudoku graph has 81 vertices, one vertex for each cell.

  7. Solving a Rubik's cube is easier than you think: Here's how

    www.aol.com/news/2015-07-21-solving-a-rubiks...

    The Rubik's Cube world champion is 19 years old an can solve it in less than 6 seconds. While you won't get anywhere near his time without some years of practice, solving the cube is really not ...

  8. Optimal solutions for the Rubik's Cube - Wikipedia

    en.wikipedia.org/wiki/Optimal_solutions_for_the...

    The cube restricted to only 6 edges, not looking at the corners nor at the other edges. The cube restricted to the other 6 edges. Clearly the number of moves required to solve any of these subproblems is a lower bound for the number of moves needed to solve the entire cube. Given a random cube C, it is solved as iterative deepening. First all ...

  9. CFOP method - Wikipedia

    en.wikipedia.org/wiki/CFOP_method

    The CFOP method (Cross – F2L – OLL – PLL), also known as the Fridrich method, is one of the most commonly used methods in speedsolving a 3×3×3 Rubik's Cube. It is one of the fastest methods. This method was first developed in the early 1980s, combining innovations by a number of speed cubers. Jessica Fridrich, a Czech speed cuber and ...

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