Puzzlewright Guide to Solving Sudoku: Hundreds of Puzzles Plus Techniques to Help You Crack Them All

Offers Sudoku designers a guide to cracking addictive puzzles, and Sudoku solvers a way to improve their skills. This title includes tricks such as hidden pairs, naked pairs, X-wings, jellyfish, squirmbag, bivalue and bilocation graphs and chains, as well as the exclusive Gordonian logic methods that turn the toughest puzzles into a breeze.