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  2. Sudoku - Wikipedia

    en.wikipedia.org/wiki/Sudoku

    French newspapers featured similar puzzles in the 19th century, and the modern form of the puzzle first appeared in 1979 puzzle books by Dell Magazines under the name Number Place. [5] However, the puzzle type only began to gain widespread popularity in 1986 when it was published by the Japanese puzzle company Nikoli under the name Sudoku ...

  3. Taking Sudoku Seriously - Wikipedia

    en.wikipedia.org/wiki/Taking_Sudoku_Seriously

    The book also includes discussions on the nature of mathematics and the use of computers in mathematics. [4] After an introductory chapter on Sudoku and its deductive puzzle-solving techniques [1] (also touching on Euler tours and Hamiltonian cycles), [5] the book has eight more chapters and an epilogue.

  4. 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.

  5. 4 brain games to keep your mind sharp and improve memory ...

    www.aol.com/lifestyle/4-brain-games-keep-mind...

    Math puzzles. Number games like Sudoku require analytical skills “and allow for pattern recognition and problem-solving abilities, which are needed for strengthening short-term memory,” says ...

  6. 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.

  7. Cracking the Cryptic - Wikipedia

    en.wikipedia.org/wiki/Cracking_the_Cryptic

    The channel has produced nine Sudoku apps based on Sudoku variants: Classic, Chess, Miracle, Sandwich, Thermo, Killer, Arrow, Domino and Line Sudoku.. In October 2020, a Kickstarter crowdfunding campaign was announced in order to produce a physical book with some of the channel's most popular puzzles.

  8. Mathematics of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_Sudoku

    The general problem of solving Sudoku puzzles on n 2 ×n 2 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.

  9. Taking on the GCHQ Christmas challenge? These experts can help

    www.aol.com/news/taking-gchq-christmas-challenge...

    Take the puzzle, underline key words, work out what you do and don't know." Alan Connor, the Guardian's crossword editor and the puzzle consultant on BBC One's puzzle-based detective series Ludwig ...

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