Way Beyond Black Belt Sudoku(r)

By Frank Longo

Go way beyond difficult, with the hardest, most brain-busting sudoku you've ever seen

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?

• Format: Paperback
• Language: English
• ISBN: 1454933577
• ISBN13: 9781454933571
• Release Date: October 2019
• Publisher: Puzzlewright Press
• Length: 192 Pages
• Weight: 0.50 lbs.
• Dimensions: 0.3" x 5.3" x 8.2"
• Age Range: 14 years and up
• Grade Range: Grade 9 to Postsecondary