{"product_id":"double-samurai-sudoku-harakiri-compendium-81-overlapping-sudoku-puzzles-8-grids-in-1-paperback","title":"Double Samurai Sudoku Harakiri Compendium: 81 overlapping sudoku puzzles, 8 grids in 1 - Paperback","description":"\u003cdiv\u003e\u003cp style=\"text-align: right;\"\u003e\u003ca href=\"https:\/\/reportcopyrightinfringement.com\/\" target=\"_blank\" rel=\"nofollow\"\u003e\u003cb\u003eReport copyright infringement\u003c\/b\u003e\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e\u003cp\u003eby \u003cb\u003eDjape\u003c\/b\u003e (Author)\u003c\/p\u003e\u003cp\u003eDouble the Samurai, Double the Challenge: 81 Extreme Gattai-8 Sudoku Puzzles\u003c\/p\u003e\u003cp\u003eExperience the evolution of overlapping logic with \u003cb\u003eSudoku Harakiri\u003c\/b\u003e. Created by Djape, the renowned puzzle author for \u003ci\u003eThe Washington Post\u003c\/i\u003e, this compendium introduces the \"Gattai-8\" format-a sophisticated architecture featuring eight overlapping 9x9 grids. Laid out as two Samurai Sudokus stacked atop one another, every puzzle in this volume provides double the complexity and deductive depth of a standard Samurai challenge.\u003c\/p\u003e\u003cb\u003eMaster the Harakiri Variants\u003c\/b\u003e\u003cp\u003eThis is not a \"vanilla\" collection. To push your logical limits, this volume includes five distinct Harakiri variants, each adding a new layer of constraints to the Gattai-8 structure: \u003c\/p\u003e\u003cul\u003e \u003cli\u003e\n\u003cb\u003eJigsaw Harakiri: \u003c\/b\u003e Traditional 3x3 nonets are replaced with irregularly shaped jigsaw regions, requiring a total shift in pattern recognition.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eConsecutive \u0026amp; Non-Consecutive: \u003c\/b\u003e Logic dictated by the presence-or strict absence-of adjacent numerical sequences across the overlapping grids.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDiagonal Harakiri: \u003c\/b\u003e Every diagonal in every 9x9 sub-puzzle must contain unique digits from 1 to 9.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eHyper Harakiri (Windoku): \u003c\/b\u003e Each sub-puzzle contains four additional shaded 3x3 \"windows\" that must also contain unique digits.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eProfessional Construction \u0026amp; Pure Logic\u003c\/b\u003e\u003cp\u003eIn alignment with the Djape standard, every puzzle is verified for \u003cb\u003e100% logical solvability\u003c\/b\u003e. You will never encounter a grid that requires guessing or trial-and-error. By applying standard Sudoku techniques across the interlocked 8-grid system, you can solve every puzzle through pure deductive reasoning.\u003c\/p\u003e\u003cb\u003eOptimized for Serious Solvers: \u003c\/b\u003e\u003cul\u003e \u003cli\u003e\n\u003cb\u003e81 All-New Puzzles: \u003c\/b\u003e A massive collection of high-difficulty grids that have never been published in other volumes.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStrategic Instruction: \u003c\/b\u003e Includes a detailed introduction explaining the rules of each variant and expert solving suggestions, such as why you should never start with the center sub-puzzle.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePremium Format: \u003c\/b\u003e Large 8\" x 10\" layout printed on thick, high-quality white paper designed to withstand heavy use and erasing.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eUnique Solution Guarantee: \u003c\/b\u003e Every puzzle has exactly one correct solution, ensuring a frustrating-free (but challenging) experience.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhether you are an engineer, a math enthusiast, or a veteran solver looking for the next step in Sudoku evolution, the \u003cb\u003eDouble Samurai Sudoku Harakiri Compendium\u003c\/b\u003e delivers an elite mental workout.\u003c\/p\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003eNumber of Pages:\u003c\/strong\u003e 100\u003c\/div\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.21 x 11 x 8.5 IN\u003c\/div\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003ePublication Date:\u003c\/strong\u003e June 12, 2017\u003c\/div\u003e\n            ","brand":"Books by splitShops","offers":[{"title":"Default Title","offer_id":50375866679533,"sku":"9781548038229","price":20.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0020\/8918\/9441\/files\/q6sgCKkekE9781548038229.webp?v=1785572877","url":"https:\/\/www.webster.direct\/en-ca\/products\/double-samurai-sudoku-harakiri-compendium-81-overlapping-sudoku-puzzles-8-grids-in-1-paperback","provider":"Webster.Direct","version":"1.0","type":"link"}