{"product_id":"calcudoku-puzzles-200-very-hard-puzzles-9x9-book-16-9781706372707","title":"CalcuDoku Puzzles - 200 Very Hard Puzzles 9x9 Book 16","description":"\u003cp\u003e • Author(s): Liam Parker\u003cbr\u003e • Publisher: Independently Published\u003cbr\u003e • Publisher Imprint: Independently Published\u003cbr\u003e • BISAC: Puzzles\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eEach puzzle consists of a grid containing blocks surrounded by bold lines. The object is to fill all empty squares so that the numbers 1 to N (where N is the number of rows or columns in the grid) appear exactly once in each row and column and the numbers in each block produce the result shown in the top-left corner of the block according to the math operation appearing on the top of the grid. In CalcuDoku a number may be used more than once in the same block.\u003c\/p\u003e","brand":"Independently Published","offers":[{"title":"Paperback","offer_id":45536025608343,"sku":"9781706372707","price":639.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3471\/1191\/files\/9781706372707.webp?v=1767900739","url":"https:\/\/atlanticbooks.com\/products\/calcudoku-puzzles-200-very-hard-puzzles-9x9-book-16-9781706372707","provider":"Atlantic Books","version":"1.0","type":"link"}