{"id":1689,"date":"2013-06-28T09:00:39","date_gmt":"2013-06-28T16:00:39","guid":{"rendered":"http:\/\/www.gmpuzzles.com\/blog\/?p=1689"},"modified":"2022-08-08T19:05:55","modified_gmt":"2022-08-09T02:05:55","slug":"championship-chatter-the-sudoku-dynasty-begins","status":"publish","type":"post","link":"https:\/\/www.gmpuzzles.com\/blog\/2013\/06\/championship-chatter-the-sudoku-dynasty-begins\/","title":{"rendered":"Championship Chatter – The Sudoku Dynasty Begins"},"content":{"rendered":"

Two more from the US Sudoku Qualifying Test in May.<\/p>\n

The first, a Tile Sudoku, is a pattern I’ve used before but not in my recent GMPuzzles series of Tile Sudoku<\/a>. Like almost every single one of these Tile Sudoku, there are “meta-constraints” forced by the geometry change that make the solve easier. First, all the 2×2 squares form a 1-9 set, which is not that hard to prove. But did you notice that each 1×3 rectangle made out of a 1×2 + 1×1 cell is part of a triplet of such rectangles that will contain the digits XY, YZ, and ZX? Because each of these 12 groups of linked 1×3 rectangles need at least one given placed into them, this 16 given puzzle is pretty close to minimal for the geometry.<\/span> This puzzle’s goal was to have a clean 1-8 clock in one of the two symmetric groups, and then a choice of the remaining digits to leave a non-trivial solve even if solvers know about some of the hidden groups.<\/p>\n

The second puzzle – Dynasty Sudoku – was a newer style for me. It’s an idea I’ve had in the back of my head to use a lot in a kind of follow-up to Mutant Sudoku. But I had not put it to paper before Adam R. Wood debuted it on the 2011 USPC. Of course his grid needed irregular regions and a 12×12 size to get a lot out of the dynasty rule. I challenged myself to make an interesting 9×9 puzzle with regular regions that still required several deductions based on not closing off the white spaces and I think I succeeded with this puzzle.<\/p>\n

\"Sudoku<\/p>\n

PDF<\/a><\/p>\n

or solve online<\/a> (using our beta test of Penpa-Edit tools)<\/p>\n

Theme:<\/b> Pattern in regions and digits<\/p>\n

Rules:<\/b> Standard Tile Sudoku<\/a> rules.<\/p>\n

Answer String:<\/b> For the USSQT, the answer strings were a set of rows\/columns encountered late in the puzzle. For this week, you can just hit the solved button on an honor system if you think you’ve solved it. <\/p>\n

Solution:<\/b> PDF<\/a><\/p>\n

\"Sudoku<\/p>\n

PDF<\/a><\/p>\n

or solve online<\/a> (using our beta test of Penpa-Edit tools; use tab to alternate between Sudoku number entry mode and a shading mode to mark the black squares.)<\/p>\n

Theme:<\/b> Logical<\/p>\n

Rules:<\/b> Variation of Sudoku<\/a> rules. Place the digits 1 through 7 and two black cells in each row, column, and 3×3 region. Additionally, the black cells do not touch each other on the edges, and the white cells must form a single connected region.<\/p>\n

Answer String:<\/b> For the USSQT, the answer strings were a set of rows\/columns encountered late in the puzzle. For this week, you can just hit the solved button on an honor system if you think you’ve solved it. <\/p>\n

Solution:<\/b> PDF<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Two more from the US Sudoku Qualifying Test in May. The first, a Tile Sudoku, is a pattern I’ve used before but not in my recent GMPuzzles series of Tile Sudoku. Like almost every single one of these Tile Sudoku, there are “meta-constraints” forced by the geometry change that make the solve easier. First, all […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[133,3,63,126],"tags":[56,64,82],"class_list":["post-1689","post","type-post","status-publish","format-standard","hentry","category-competition-discussion","category-puzzle","category-tile-sudoku","category-othersudoku","tag-variation-2","tag-tilesudoku","tag-classic"],"yoast_head":"\nChampionship Chatter - The Sudoku Dynasty Begins - The Art of Puzzles<\/title>\n<meta name=\"description\" content=\"Discussion of the Tile Sudoku and Dynasty Sudoku puzzles from the 2013 US Sudoku Qualifying Test, by Thomas Snyder aka Dr. Sudoku.\" \/>\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\/2013\/06\/championship-chatter-the-sudoku-dynasty-begins\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Championship Chatter - 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