Killer Su Doku poses an even greater challenge than the Fiendish Su Doku puzzles.Here are 100 previously unpublished puzzles for hard-core Su Doku addicts.
Stimulate your brain with this Experienced Puzzler Hard 16 x 16 Sudoku Puzzle Book. Become a Sudoku Pro by solving all 55 puzzles in this book. Be careful - Sud
The latest volume in the Killer Su Doku series from the puzzle suppliers to The Times features the highest-quality puzzles with an extra element of arithmetic.
Challenge your brain with these enjoyable puzzles. Specially compiled to provide the most deadly Su Doku challenge, this is the only volume for Su Doku enthusia