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Here is Sudoku. I never liked this puzzle until I got it with my cell phone and started playing it. I am getting good at it. This one has 5 skill levels you can choose from...Easy, Gentle, Moderate, Tough, and Diabolical. You can highlight numbers to see where all of a certain number are on the grid, and can check your solution. You can type in a number (thousands of combinations) for new puzzles. You can print it out also if you wish.
