TURING TESTS: EXPERT SUDOKU

Alan Turing is often called the father of modern computing. During World War II he played a pivotal role at Bletchley Park, cracking coded messages sent by Nazi Germany and her allies. Published in association with The Turing Trust, this challenging collection of sudoku puzzles will stretch, puzzle and entertain you for hours. Set your mind to work and see whether you have the skills to become a Bletchley number cruncher.