{"product_id":"way-beyond-black-belt-sudoku®-martial-arts-puzzles-series","title":"Way Beyond Black Belt Sudoku® (Martial Arts Puzzles Series)","description":"Go way beyond difficult, with the hardest, most brain-busting sudoku you’ve ever seen!\n\nCalling 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?\u003cbr\u003eASIN: 1454933577\u003cbr\u003eVSKU: BVV.1454933577.VG\u003cbr\u003eCondition: Very Good\u003cbr\u003eAuthor\/Artist:Longo, Frank\u003cbr\u003eBinding: Paperback\u003cbr\u003e\u003cb\u003eNote:\u003c\/b\u003e Any images shown are stock photographs and product may differ from what is shown.  \u003cbr\u003e\u003cb\u003eCondition Notes\u003c\/b\u003e: Book has little sign of wear or use  \u003cbr\u003e","brand":"Blue Vase Books","offers":[{"title":"Default Title","offer_id":43779749543997,"sku":"BVV.1454933577.VG","price":9.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0589\/4225\/9261\/files\/1454933577-0.jpg?v=1791407926","url":"https:\/\/www.bluevasebooks.com\/products\/way-beyond-black-belt-sudoku%c2%ae-martial-arts-puzzles-series","provider":"Blue Vase Books","version":"1.0","type":"link"}