Black Belt Sudoku®

Challenge your mind with Black Belt Sudoku® by Michael Rios, published by Union Square & Co. in 2005. This engaging paperback features 192 pages filled with 300 expertly crafted Sudoku puzzles designed for the ultimate solver. Following a unique karate-inspired grading system, this book categorizes its puzzles by color: White Belt for beginners, Green Belt for intermediate players, Brown Belt for advanced enthusiasts, and the coveted Black Belt for those seeking the toughest challenges. Whether you are looking to sharpen your skills or dive into the world of Sudoku, this collection offers something for everyone. Perfect for puzzle lovers and brain teaser aficionados, Black Belt Sudoku® is a must-have addition to your game library. Get ready to test your limits and enjoy hours of stimulating fun!