{"product_id":"sudoku-x-200-hard-puzzles-9x9-volume-7-9781661604448","title":"Sudoku X - 200 Hard Puzzles 9x9 (Volume 7)","description":"\u003cb\u003eSudoku X\u003c\/b\u003e (also known as \"\u003ci\u003eDiagonal Sudoku\u003c\/i\u003e\") is a placement puzzle. In this sudokus main diagonals also contain the digits 1 through 9. \u003cp\u003e\u003c\/p\u003e\u003cb\u003eAbout Book\u003c\/b\u003e\u003cbr\u003eThis book introduces you to the amazing world of Sudoku X puzzles.\u003cbr\u003eIt will help you understand the rules of this puzzle.\u003cbr\u003eThis book is perfect for players of all ages.\u003cbr\u003eYou will find \u003cb\u003e200\u003c\/b\u003e exciting puzzles, for professionals. \u003cp\u003e\u003c\/p\u003e\u003cb\u003eHOW TO PLAY\u003c\/b\u003e\u003cbr\u003eIt is a \u003cb\u003e9x9\u003c\/b\u003e grid, partially divided by black cells into compartments. \u003cp\u003e\u003c\/p\u003eThe puzzle is most frequently a \u003cb\u003e9x9\u003c\/b\u003e grid made up of \u003cb\u003e3x3\u003c\/b\u003e subgrids (called \"regions\"). Some cells already contain numbers, known as \"givens\". The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. Main diagonals also contain the digits 1 through 9. Each number in the solution therefore occurs only once in each of three \"directions\".\u003cbr\u003e","brand":"Independently Published","offers":[{"title":"Default Title","offer_id":50371638853906,"sku":"9781661604448","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_d1e0949e-8bb0-459c-adbe-ee58259031c9.jpg?v=1728536712","url":"https:\/\/surprise-castle.myshopify.com\/products\/sudoku-x-200-hard-puzzles-9x9-volume-7-9781661604448","provider":"Surprise Castle","version":"1.0","type":"link"}