Customizable puzzle generation. Various Größe / difficulty options. See the solution for a puzzle, or its logical steps. Unlimited undo and redo support while solving. Save and Open, Send and Share puzzles. Print puzzles (in batches or one at a time). Su Doku: The highly addictive puzzle craze---now available for PC! Based on symbolic logic (no maths involved), these simple yet tricky puzzles have famously enthralled puzzlers in Japan and the UK. Now, Su Doku is getting increasingly popular all around the world---and with SuDokuPRO on your PC, the fun simply won't end!