| Amazon Product Description 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 won’t 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! |
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| Amazon Product Description Are you tough enough? Take on this collection of 200 devilishly difficult sudoku puzzles! Includes: -200 hard puzzles -Perfect portable size -Big grids for easy solving |
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| Amazon Product Description Sudoku is a logic-based number placement puzzle. The objective is to fill a 9×9 grid so that each column, each row, and each of the nine 3×3 boxes (also called blocks or regions) contains the digits from 1 to 9 only one time each. The puzzle setter provides a partially completed grid. |
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