Generate and solve unlimited, well crafted Sudoku puzzles. Choose from four difficulty levels, different modes of input and the visual skin that suits your style. Utilize the many options to guide your learning and help you solve the trickiest puzzles - all by logic alone. Keep track of your progress with best and average times per level. Customize the "Classic" look with your own colors. Each puzzle uniquely numbered - solve the same ones here and online at the DKM Software web site. Elegant, clean design uses very little system memory.