Overview
With every puzzle requiring upper-level strategies, this collection packs even more of a punch than Beyond Black Belt Sudoku. You'll encounter common advanced techniques with curious-sounding names like Sashimi X-Wing, Swordfish, and Gordonian Polygon, as well as some tricky new things, including Grouped X-Cycle and 3D Medusa. The puzzles grow increasingly difficult as the book goes along, from "pretty darn hard" to "excruciating."
- | Author: Frank Longo
- | Publisher: Puzzlewright
- | Publication Date: Oct 01, 2019
- | Number of Pages: 192 pages
- | Language: English
- | Binding: Paperback
- | ISBN-10: 1454933577
- | ISBN-13: 9781454933571
