Belt Sudoku Variants: 300 Puzzles in Bloomington, MN

Get ready to fight your way to the top of the sudoku ranks! Each book in this Martial Arts sudoku series will contain 300 puzzles, with a different blend of sudoku variants depending on the difficulty level.
Brown Belt Sudoku Variants
will include puzzle types featured in the
Green Belt
at a higher level, as well as some additional variants.