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The NINJA is the fastest and most full-featured SuDoku player and solver in the world. It even has a built-in internet browser to surf to participating SuDoku puzzle sites and easily download puzzles to your NINJA! Just enter any authentic SuDoku puzzle into your NINJA and you can solve it with or without computer help. Or you can use the famous "Auto Solve" feature and NINJA will solve the puzzle in an instant! You can save the puzzle at any time with its solution and entire move history to a file, and then print it out or email it for future reference. All registered owners receive FREE UPGRADES and FREE PUZZLES. You'll never want to work another SuDoku puzzle without your very own NINJA!