Brown Belt Sudoku(r) (Martial Arts Sudoku) (Paperback)
Puzzlewright, 9781402735974, 192pp.
Publication Date: September 28, 2005
With a separate sudoku book for every level, all puzzle lovers can play this wildly popular, incredibly addictive game that's 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.