{"product_id":"calcudoku-puzzles-mixed-200-master-puzzles-vol4-9798518845091","title":"CalcuDoku Puzzles Mixed - 200 Master Puzzles vol.4","description":"Each 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.\u003cbr\u003e","brand":"Independently Published","offers":[{"title":"Default Title","offer_id":51359084445970,"sku":"9798518845091","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_9ac18899-f114-46ec-b03a-b9f981492275.jpg?v=1749579539","url":"https:\/\/surprise-castle.myshopify.com\/products\/calcudoku-puzzles-mixed-200-master-puzzles-vol4-9798518845091","provider":"Surprise Castle","version":"1.0","type":"link"}