Challenge Your Brain with WareSoft Sudoku. See how fast you can solve a puzzle. Each puzzle has 9 3x3 grids to solve. Sudoku does not require any special math skills or calculations. It is a simple and fun game of logic. All that you need is your brains and concentration. To solve Sudoku you must enter numbers 1-9 in each row without repeating any numbers and not repeat any numbers in a 3x3 grid either. It is a lot harder than you think it is. With 3 levels of difficulty it will be sure to please beginners and pros alike. You can check along the way to see if your answers are correct. It will let you know which ones are and which ones are not. But watch out, doing so adds 4 seconds to the clock. If you give up in frustration you can have it solve the puzzle for you. If you push the solve button and change your mind, it will add 4 seconds to the clock too. With a possibility of almost 1 million puzzles, it will provide you with years of puzzles, if not a lifetime.