{"product_id":"400-hard-killer-sudoku-puzzles-puzzpond-designs-9798640835922","title":"400 Hard Killer Sudoku Puzzles: Challenging Sum Sudoku puzzles for adults","description":"\u003cp\u003e\u003cstrong\u003eImprove Your Mental Focus, Boost Your Brain Powers, and enjoy your time solving the Killer Sudoku puzzles. \u003cbr\u003e\u003c\/strong\u003e\u003cbr\u003eSudoku games have been scientifically proven to improve mental focus, Sharpen the memory as well as protecting the brain from neurodegenerative disorders. \u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cstrong\u003eThis Book has 400 Puzzles of killer Sudoku in 4 levels, from Hard to extremely hard (100 Puzzles in each level). Answers to all the puzzles are included at the end of the book. \u003cbr\u003e\u003c\/strong\u003e\u003cbr\u003eKiller Sudoku cheat sheet for unique sum combinations included \u003cp\u003e\u003c\/p\u003e\u003cstrong\u003eWhat is killer Sudoku, aka Sum Sudoku or sumdoku? And how to solve them?\u003cbr\u003e\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eYou start with an empty grid and only given the sum of caged cells written in small font on the upper left corner of the cage. You have to work out the summation and find the numbers in the cage, region, row, and columns. \u003c\/li\u003e\n\u003cli\u003eOf course, you will use every tip and trick used for traditional Sudoku and more. \u003c\/li\u003e\n\u003cli\u003eAs any Sudoku puzzles, numbers from 1 to 9 to be placed in a row or column or region with no repetition.\u003c\/li\u003e\n\u003cli\u003eThere are many tips to solve traditional Sudoku especially elimination and exclusion and logic. But for killer Sudoku the rule of 45 and unique sum are one of the most important clues to solve the puzzle. (More instruction and tips can be found inside the book.)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eFeatures: \u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 8 x 11.5 inch (large size) with softcover and paperback binding so easy store and use. \u003c\/li\u003e\n\u003cli\u003ePages: 132 pages with full-page 400 different puzzles. Plus the solutions of all the puzzles at the end. \u003c\/li\u003e\n\u003cli\u003ePlus 10+ Bonus puzzles of different Sudoku variant \u003c\/li\u003e\n\u003cli\u003eKiller Sudoku cheat sheet for unique sum combinations included.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eImprove your mental focus with this unique selection of easy, fun killer Sudoku puzzles. Scroll up and order your copy. \u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Puzzpond Designs\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 8640835926\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9798640835922\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Independently Published\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 04\/28\/2020\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 134\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.72lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 11.00h x 8.50w x 0.29d","brand":"Puzzpond Designs","offers":[{"title":"Paperback","offer_id":44129829945599,"sku":"9798640835922","price":9.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_2c40ecb8-20ba-4a74-86cc-d1f391920160.jpg?v=1687466038","url":"https:\/\/www.whiterainbookhouse.com\/products\/400-hard-killer-sudoku-puzzles-puzzpond-designs-9798640835922","provider":"WR Book House","version":"1.0","type":"link"}