Chemistry Su Doku is the highly addictive puzzle phenomenon with a scientific twist. Su Doku puzzles, or 'crosswords without words', have swept the globe with everyone, young and old, tackling these fascinating brainteasers. Now, chemists can enjoy Su Doku problems which have been specifically designed with them in mind. The task is still to complete every row, column and cube in the 9X9 grid, as in a normal puzzle, but using chemical symbols and elements in place of numbers. There are 70 unique puzzles, ranked in order of difficulty...so what are you waiting for? Discover the latest and most exciting advance in science for yourself!