{"product_id":"way-beyond-black-belt-sudokur","title":"Way Beyond Black Belt Sudoku(r)","description":"\u003cb\u003eGo way beyond difficult, with the hardest, most brain-busting sudoku you've ever seen!\u003c\/b\u003e \u003cp\u003e\u003c\/p\u003e Calling all sudoku-solving diehards: with every puzzle requiring upper-level strategies, this collection packs even more of a punch than our previous \u003ci\u003eBeyond Black Belt Sudoku\u003c\/i\u003e. 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":"Frank Longo","offers":[{"title":"Paperback","offer_id":46352682877164,"sku":"9781454933571","price":11.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0684\/1791\/3068\/files\/9781454933571.jpg?v=1744244603","url":"https:\/\/intl.allstora.com\/products\/way-beyond-black-belt-sudokur","provider":"Allstora","version":"1.0","type":"link"}