With a separate sudoku book for every level, all puzzle lovers can play this wildly popular, incredibly addictive game thats appearing in major newspapers all over! Taking a page from karate--another Japanese art--each title is graded by color: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers. And because each book has an amazing 300 puzzles, the fun can go on for hours.
I've completed 253 sudoku puzzles without mistakes out of the 300. This book has accompanied me for a year long with memories of places I've been to. It's a good set of sudoku challenges. Moving on to the brown belt for me!