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  2. 20 Printable Sudoku Puzzles to Test Your Smarts - AOL

    www.aol.com/15-printable-sudoku-puzzles-test...

    The post 20 Printable Sudoku Puzzles to Test Your Smarts appeared first on Reader's Digest. You want to start with the easy ones, but if you're an expert, you can skip to the extra hard puzzles.

  3. 36 Cube - Wikipedia

    en.wikipedia.org/wiki/36_cube

    36 Cube puzzle in box. The 36 Cube is a three-dimensional sudoku puzzle created by ThinkFun. The puzzle consists of a gray base that resembles a city skyline, plus 36 colored towers. The towers come in six different colors and six different heights.

  4. 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. [11] It was subsequently produced in China, marketed and sold internationally. A scrambled colorless Sudoku Cube

  5. Sudoku - Wikipedia

    en.wikipedia.org/wiki/Sudoku

    A three-dimensional Sudoku puzzle was published in The Daily Telegraph in May 2005. The Times also publishes a three-dimensional version under the name Tredoku. Also, a Sudoku version of the Rubik's Cube is named Sudoku Cube. Many other variants have been developed.

  6. Sudoku solving algorithms - Wikipedia

    en.wikipedia.org/wiki/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.

  7. Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  8. Mathematics of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_Sudoku

    For classical Sudoku, the number of filled grids is 6,670,903,752,021,072,936,960 (6.671 × 10 21), which reduces to 5,472,730,538 essentially different solutions under the validity-preserving transformations. There are 26 possible types of symmetry, but they can only be found in about 0.005% of all filled grids. An ordinary puzzle with a ...

  9. Skewb Diamond - Wikipedia

    en.wikipedia.org/wiki/Skewb_Diamond

    The Skewb Diamond is an octahedron-shaped combination 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. It was invented by Uwe Mèffert, a German puzzle inventor and designer.