The "Times" Su Doku: Bk. 3: The Original Addictive Number-placing...

Su Doku 'the crossword without words' comes with a health warning : it is seriously addictive. Here is a third collection of 100 previously unpublished puzzles for those in need of a fix. Four levels of difficulty with more difficult and fiendish than easy and mild puzzles. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic. The Times Su Doku is the original and best. Each puzzle leads by logic to a unique solution so that no guessing is necessary.