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

Here it comes: a revolution in sudoku solving! This is by far the most complete guide to cracking these addictive puzzles ever produced with tricks even the experts wont know. While most books might have a few pages of introduction before proceeding straight to the sudokus this one covers it all. Hidden pairs naked pairs X-wings jellyfish squirmbag bivalue and bilocation graphs turbot fish grid coloring chains: every single one is here and much more too including the exclusive Gordonian logic methods (Gordonian rectangles and Gordonian polygons) that will turn even the hardest puzzles into a breeze. Of course there are hundreds of sudoku for practice. A very special addition: a reprint of the very first sudoku ever published in 1979 from Dell Pencil Puzzles and Word Games magazine!