The Times Super Fiendish Su Doku Book 9: 200 Challenging Puzzles (the Times Su Doku)

The Times Mind Games

Challenge yourself at home with number puzzles Previously unpublished quality Su Doku grids from The Times, which help develop your skills to take on Extreme Su Doku. The 200 puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You wil...