Times Difficult Su Doku

A collection of 200 previously unpublished Difficult Su Doku puzzles. Perfect for the more advanced Su Doku solver in need of a constant supply of challenging puzzles. Guaranteed to provide hours of absorbing brain-stretching entertainment. Since the first Su Doku puzzle appeared in The Times in November 2004 they have become a phenomenon with over 4 million copies of The Times Su Doku books sold worldwide. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic. Each puzzle has a unique solution - and there's no guesswork required.<br>The Times Su Doku remains the original the best and the market leader. The puzzles are provided by Wayne Gould the man who started it all.