Millions of Sudoku puzzles are at your fingertips with Sudoku Works. Sudoku Works can create puzzles in four grid sizes (4x4, 6x6, 8x8 and 9x9) with five difficulty levels, so it can make puzzles for everyone from beginner to expert. And with over 50 million possible puzzles, it's unlikely you'll ever run out of puzzles to play. An exciting way to share the Sudoku experience is with the "Puzzle of the Day". With "Puzzle of the Day", all Sudoku Works players will be given the same puzzle to solve so you can play with or against your friends. A puzzle timer is available to make it easy to compare results. Special features in Sudoku Works make playing Sudoku easy and fun. You can use "penciling" to make notes in the squares, and use the "auto-pencil", "show mistakes" and "show selected number" features to help you if you need it. If you want to take a break, you can always return to a partly completed puzzle, or you can replay any previously completed puzzle.