Su Doku Classic is the PC version of the puzzle craze sweeping the nation. You'll find a whole host of Su Doku puzzles to get your teeth into from really easy ones to fiendishly difficult! Addictive and fun the rules are simple - each number from 1 to 9 should be used only once in each row, column and 3 by 3 square. The puzzle is completed when there are no more unknown squares. But don't worry - you don't have to be a mathematical genius to play, as each of the puzzles is solved using pure logic. Su Doku Classic has 3 difficulty levels - beginner, intermediate and advanced, providing hours of challenging fun for all ages & ability levels! Su Doku is the ultimate game of logic where you have a table of 3 by 3 boxes, the rules are easy - each number from 1 to 9 should be used only once in each row, column and 3 by 3 square. Su Doku Deluxe is packed to the brim with puzzles featuring numbers, letters and pictures adding even more fun and variety to your daily fix of Su Doku! Featuring a stunning collection of over 100,000 beautifully crafted puzzles with each game having three difficulty levels - from easy to fiendishly difficult - making it suitable for a wide age range and for amateurs and enthusiasts alike. Now you can add pencil marks to your grid to help work through even the most difficult of puzzles. Created your own puzzle? Why not export it as a picture file and email it to your family and friends for them to enjoy as well.