{"id":91,"date":"2012-12-31T07:00:22","date_gmt":"2012-12-31T15:00:22","guid":{"rendered":"http:\/\/www.gmpuzzles.com\/blog\/?page_id=91"},"modified":"2021-11-27T12:52:13","modified_gmt":"2021-11-27T20:52:13","slug":"sudoku-rules-and-info","status":"publish","type":"page","link":"https:\/\/www.gmpuzzles.com\/blog\/sudoku-rules-and-info\/","title":{"rendered":"Sudoku Rules and Info"},"content":{"rendered":"<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/www.gmpuzzles.com\/images\/blog\/GM-SudokuEx.png\" alt=\"Example sudoku and solution\" width=\"500\"><\/p>\n<p><b>Rules:<\/b> Insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region.<\/p>\n<p><b>Answer String:<\/b> Enter the row\/column marked &#8220;A&#8221;, followed by a comma, followed by the row\/column marked &#8220;B&#8221;. Rows are entered from left to right and columns from top to bottom. This example has the key &#8220;231894576,453296718&#8221;.<\/p>\n<p><b>(Brief) History of Sudoku:<\/b> Descended from other Latin Square puzzle types. The region constraint essential to this style was first introduced by Howard Garns in 1979. His puzzles, called &#8220;Number Place&#8221;, were first published in the US and later taken back to Japan as &#8220;Nanpure&#8221; by several puzzle designers. In Japan, the puzzle evolved in numerous ways, including the introduction of symmetry, increased difficulty, and fewer clues. &#8220;Nanpure&#8221; was renamed &#8220;Sudoku&#8221; by Nikoli, a Japanese publisher whose puzzles inspired the reintroduction of this style to the west by Wayne Gould through <i>The Times<\/i> (of London).<\/p>\n<p><b>History of this example:<\/b> This puzzle is very similar to the first classic sudoku written by Thomas Snyder, which appeared in his <a href=\"http:\/\/motris.livejournal.com\/28008.html\">&#8220;The Art of Sudoku&#8221;<\/a> post after winning his first world championship in Prague in 2007. This specific puzzle is used on the front cover of his book: <a href=\"https:\/\/shop.gmpuzzles.com\/products\/the-art-of-sudoku\"><i>The Art of Sudoku<\/i><\/a>.<\/p>\n<p><b>Sources for Sudoku Puzzles:<\/b> Follow this link for classic <a href=\"https:\/\/www.gmpuzzles.com\/blog\/tag\/sudoku-3+classic\/\">Sudoku puzzles<\/a> on this website and this link for <a href=\"https:\/\/www.gmpuzzles.com\/blog\/tag\/sudoku-3+variation-2\/\">variations on Sudoku<\/a> besides the ones in separate sub-categories already. If you are new to this puzzle type, here are our <a href=https:\/\/www.gmpuzzles.com\/blog\/tag\/sudoku-3+classic+mondaytuesday\/>easiest Sudoku Puzzles<\/a> to get started on. More classic Sudoku puzzles can be found in <a href=\"https:\/\/shop.gmpuzzles.com\/products\/the-art-of-sudoku\"><i>The Art of Sudoku<\/i><\/a>, <a href=\"https:\/\/shop.gmpuzzles.com\/collections\/the-art-of-sudoku-2\"><i>The Art of Sudoku 2<\/i><\/a> and in our beginner-friendly collection <a href=https:\/\/www.gmpuzzles.com\/store\/intro-to-gmpuzzles><i>Intro to GMPuzzles<\/i><\/a> by Serkan Y\u00fcrekli.<\/p>\n<p><b>Design rules for contributors:<\/b> A Grandmaster Sudoku will have a unique solution that can be reached by logic alone. Generally, a Grandmaster Sudoku must have 32 or fewer givens and must have some aspects of symmetry or a theme that is interesting enough to not require symmetry.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rules: Insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region. Answer String: Enter the row\/column marked &#8220;A&#8221;, followed by a comma, followed by the row\/column marked &#8220;B&#8221;. Rows are entered from left to right and columns from top to bottom. This example [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-91","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sudoku Rules and Info - The Art of Puzzles<\/title>\n<meta name=\"description\" content=\"General rules and background on sudoku puzzles, as presented at Grandmaster Puzzles by Thomas Snyder aka Dr. Sudoku, three-time world sudoku champion.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gmpuzzles.com\/blog\/sudoku-rules-and-info\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sudoku Rules and Info - 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