{"id":218,"date":"2013-01-08T07:00:51","date_gmt":"2013-01-08T15:00:51","guid":{"rendered":"http:\/\/www.gmpuzzles.com\/blog\/?page_id=218"},"modified":"2022-02-27T09:02:23","modified_gmt":"2022-02-27T17:02:23","slug":"tightfitsudoku-rules-and-info","status":"publish","type":"page","link":"https:\/\/www.gmpuzzles.com\/blog\/sudoku-rules-and-info\/tightfitsudoku-rules-and-info\/","title":{"rendered":"Tight Fit Sudoku R&#038;I"},"content":{"rendered":"<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/www.gmpuzzles.com\/images\/blog\/GM-TFSudokuEx.png\" alt=\"Example Tight Fit Sudoku and solution\" width=\"500\"><\/p>\n<p><b>Rules:<\/b> Standard <a href=\"https:\/\/www.gmpuzzles.com\/blog\/sudoku-rules-and-info\">Sudoku<\/a> rules (insert a number in the indicated range into each cell so that no number repeats in any row, column, or bold region). Some cells are split by slashes; in these cells the <em>smaller<\/em> number must go above the <em>larger<\/em> number.<\/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;149567823,356182749&#8221;.<\/p>\n<p><b>(Brief) History of Tight Fit Sudoku:<\/b> Descended from Sudoku. The idea was first developed by Thomas Snyder for his book <a href=\"http:\/\/www.amazon.com\/gp\/product\/1402765029?ie=UTF8&amp;tag=theartofpuz-20&amp;linkCode=as2&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1402765029\"><i>Mutant Sudoku<\/i><\/a>, inspired by a playoff puzzle that almost appeared at the second World Sudoku Championship in Prague.<\/p>\n<p><b>History of this example:<\/b> This Tight Fit Sudoku was written by Thomas Snyder for the 2009 Czech Sudoku Championship.<\/p>\n<p><b>Sources for Tight Fit Sudoku:<\/b> Follow this link for <a href=\"https:\/\/www.gmpuzzles.com\/blog\/tag\/tightfitsudoku\/\">Tight Fit Sudoku puzzles<\/a> on this website. If you are new to this puzzle type, here are our <a href=https:\/\/www.gmpuzzles.com\/blog\/tag\/tightfitsudoku+mondaytuesday\/>easiest Tight Fit Sudoku<\/a> to get started on. More Tight Fit Sudoku puzzles can be found 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, in <a href=\"https:\/\/shop.gmpuzzles.com\/collections\/the-art-of-sudoku-2\"><i>The Art of Sudoku 2<\/i><\/a>, and in <i><a href=https:\/\/shop.gmpuzzles.com\/collections\/masterpiece-sudoku-mix\/products\/masterpiece-sudoku-mix-5-tight-fit-sudoku>Masterpiece Sudoku Mix 5: Tight Fit Sudoku<\/a><\/i>. Other sources (some potentially now out of print) are <a href=\"http:\/\/www.amazon.com\/gp\/product\/1402765029?ie=UTF8&amp;tag=theartofpuz-20&amp;linkCode=as2&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1402765029\"><i>Mutant Sudoku<\/i><\/a> and the Sit and Solve title <a href=\"http:\/\/www.amazon.com\/gp\/product\/1402799942\/ref=as_li_tf_tl?ie=UTF8&amp;tag=theartofpuz-20&amp;linkCode=as2&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1402799942\"><i>Tight Fit Sudoku<\/i><\/a> both from Sterling\/Puzzlewright.<\/p>\n<p><b>Design rules for contributors:<\/b> A Grandmaster Tight Fit Sudoku will have a unique solution that can be reached by logic alone. Generally, a Grandmaster Tight Fit Sudoku has a symmetric layout of slashed cells, and a symmetric or pseudo-symmetric layout of givens, meaning that the same tight fit cells may contain givens but they could all be &#8220;tops&#8221; and not have to be rotationally symmetric. Ranges from 1-7 to 1-12 are allowed in the standard 6&#215;6 form.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rules: Standard Sudoku rules (insert a number in the indicated range into each cell so that no number repeats in any row, column, or bold region). Some cells are split by slashes; in these cells the smaller number must go above the larger number. Answer String: Enter the row\/column marked &#8220;A&#8221;, followed by a comma, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":91,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-218","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>Tight Fit Sudoku Rules and Info - The Art of Puzzles<\/title>\n<meta name=\"description\" content=\"General rules and background on Tight Fit Sudoku puzzles, as created 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\/tightfitsudoku-rules-and-info\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tight Fit Sudoku Rules and Info - 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