{"product_id":"killer-sudoku-200-hard-to-master-puzzles-9x9-vol-25","title":"Killer Sudoku - 200 Hard to Master Puzzles 9x9 vol.25","description":"Killer Sudoku is a mix of Sudoku and Kakuro. Your goal is the same as in regular sudoku: fill every row, column and 3x3 region with the numbers 1-9 once. The difference is how you arrive at those numbers.The objective is to fill the grid with numbers from 1 to 9 in a way that the following conditions are met: Each row, column, and nonet contains each number exactly once.The sum of all numbers in a cage must match the small number printed in its corner.No number appears more than once in a cage. (This is the standard rule for killer sudokus, and implies that no cage can include more than 9 cells.\u003cbr\u003e","brand":"Independently Published","offers":[{"title":"Default Title","offer_id":50859326439698,"sku":"9781674746371","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_7e2617df-3ecd-4183-972a-59bede6be048.jpg?v=1737555666","url":"https:\/\/surprise-castle.myshopify.com\/products\/killer-sudoku-200-hard-to-master-puzzles-9x9-vol-25","provider":"Surprise Castle","version":"1.0","type":"link"}