{"product_id":"sudoku-x-250-easy-to-medium-sudoku-diagonal-puzzles-9781088872710","title":"Sudoku X: 250 Easy to Medium Sudoku Diagonal Puzzles","description":"\u003ch2\u003eSudoku X: Diagonal Sudoku Puzzle Book\u003c\/h2\u003e\n\n\u003cp\u003eThis puzzle book contains 250 Sudoku X puzzles, also known as Diagonal Sudoku, ranging from easy to medium difficulty levels. Sudoku X adds an extra challenge to traditional sudoku by requiring that both main diagonals also contain the digits 1 through 9.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Makes Sudoku X Different\u003c\/h2\u003e\n\n\u003cp\u003eIn standard sudoku, you fill a 9x9 grid so that each row, column, and 3x3 box contains the digits 1-9. Sudoku X takes this further by adding diagonal constraints. Both main diagonals running from corner to corner must also contain each digit from 1 to 9 exactly once. This additional rule creates more complex solving patterns and requires different logical strategies.\u003c\/p\u003e\n\n\u003ch2\u003ePuzzle Difficulty Range\u003c\/h2\u003e\n\n\u003cp\u003eThe 250 puzzles in this book span easy to medium difficulty levels, making it suitable for beginners developing their skills and intermediate solvers looking for a satisfying challenge. Easy puzzles provide a gentle introduction to the diagonal variant, while medium puzzles require more advanced solving techniques and pattern recognition.\u003c\/p\u003e\n\n\u003ch2\u003eBrain Training Benefits\u003c\/h2\u003e\n\n\u003cp\u003eSudoku X puzzles provide mental exercise through logical deduction and pattern recognition. Regular puzzle solving helps maintain cognitive sharpness and offers screen-free entertainment that can be enjoyed anywhere. The portable paperback format makes it convenient for travel, commutes, or quiet moments at home.\u003c\/p\u003e\n\n\u003ch2\u003eBook Details\u003c\/h2\u003e\n\n\u003cp\u003eThis independently published paperback contains 250 diagonal sudoku puzzles with varying difficulty levels. Each puzzle follows the Sudoku X format where main diagonals contain the digits 1 through 9. The book is designed for adults who enjoy puzzle challenges and prefer physical puzzle books over digital alternatives.\u003c\/p\u003e\n\n\u003cp\u003eIn some sudokus main diagonals also contain the digits 1 through 9. This variant is called Sudoku X (\"Diagonal Sudoku\"). Use the check box Diagonals for such sudokus.\u003c\/p\u003e","brand":"Independently Published","offers":[{"title":"Default Title","offer_id":50493446062354,"sku":"9781088872710","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_10d8baea-65a2-4733-a956-808b7bc1f225.jpg?v=1730647974","url":"https:\/\/surprise-castle.myshopify.com\/products\/sudoku-x-250-easy-to-medium-sudoku-diagonal-puzzles-9781088872710","provider":"Surprise Castle","version":"1.0","type":"link"}