{"product_id":"way-beyond-black-belt-sudoku-frank-longo-9781454933571","title":"Way Beyond Black Belt Sudoku®","description":"Go way beyond difficult, with the hardest, most brain-busting sudoku you’ve ever seen!\n \n Calling all sudoku-solving diehards: with every puzzle requiring upper-level strategies, this collection packs even more of a punch than our previous Beyond Black Belt Sudoku. Get ready, because you’ll encounter common advanced techniques with curious-sounding names like XYZ-Wing, Finned X-Wing, Sashimi X-Wing, Swordfish, Jellyfish, Gordonian Rectangle, and Gordonian Polygon. And you might find some tricky new things here, too, from Grouped X-Cycle and Simple Grid Coloring to 3D Medusa and Bi-Value Universal Grave. The sudoku generally become increasingly difficult as the book goes along, from “pretty darn hard” to “excruciating.” Are you up for the challenge?","brand":"Union Square \u0026 Co.","offers":[{"title":"Default Title","offer_id":50619476017440,"sku":"9781454933571","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/2812\/7264\/files\/9781454933571.jpg?v=1785239136","url":"https:\/\/bookcorner.com\/products\/way-beyond-black-belt-sudoku-frank-longo-9781454933571","provider":"The Book Corner","version":"1.0","type":"link"}