![]() ![]() On July 6, 1895, Le Siècle 's rival, La France, refined the puzzle so that it was almost a modern Sudoku and named it carré magique diabolique ('diabolical magic square'). It was not a Sudoku because it contained double-digit numbers and required arithmetic rather than logic to solve, but it shared key characteristics: each row, column, and subsquare added up to the same number. Le Siècle, a Paris daily, published a partially completed 9×9 magic square with 3×3 subsquares on November 19, 1892. Number puzzles appeared in newspapers in the late 19th century, when French puzzle setters began experimenting with removing numbers from magic squares. History From La France newspaper, July 6, 1895: The puzzle instructions read, "Use the numbers 1 to 9 nine times each to complete the grid in such a way that the horizontal, vertical, and two main diagonal lines all add up to the same total." Predecessors newspaper, and then The Times (London), in 2004, thanks to the efforts of Wayne Gould, who devised a computer program to rapidly produce unique puzzles. However, the modern Sudoku only began to gain widespread popularity in 1986 when it was published by the Japanese puzzle company Nikoli under the name Sudoku, meaning "single number". The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.įrench newspapers featured variations of the Sudoku puzzles in the 19th century, and the puzzle has appeared since 1979 in puzzle books under the name Number Place. In classic Sudoku, the objective is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contain all of the digits from 1 to 9. Anything that stretches your mind will help keep your brain sharp.Sudoku ( / s uː ˈ d oʊ k uː, - ˈ d ɒ k-, s ə-/ Japanese: 数独, romanized: sūdoku, lit.'digit-single' originally called Number Place) is a logic-based, combinatorial number-placement puzzle. I have a hand-held Sudoku game (with stylus) that I play all the time.Įven though I practice, I'm not very good. Sudoku really is an excellent brain game, as it trains logical reasoning and visual perception, among other brain skills. The challenge of sudoku is using the process of elimination and other strategies to identify the unique solution for the sudoku puzzle. The numbers 1 through 9 must appear exactly once in each 3x3 box. ![]() The numbers 1 through 9 must appear exactly once in each column. ![]() The numbers 1 through 9 must appear exactly once in each row. To figure out which number between 1 and 9 belongs in a particular cell, you need to adhere to the following rules: Your job is to determine the correct number to be entered in each of the empty cells. Some of the cells in the grid are prefilled with a number between 1 and 9, while many other cells are blank. This grid is subdivided into nine 3 x 3 boxes. ![]() The hard part lies in solving the puzzle!Ī sudoku puzzle consists of a 9 by 9 grid. Here's a summary of the rules of sudoku, in case you've never played before or need a refresher. Printable Sudoku Puzzles - Rules of Sudoku The solutions pages are provided as well. To print a puzzle page, click the "Print This Page" button at the top of the page. ![]()
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