How to Play? Step by step: Setp 1: Choose the type of the game, then click "OK" Step2: There is only one rule: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 thru 9. A column is 9 cells tall. A filled-in column has one of each digit. That means that each digit appears only once in the column. There are 9 columns in the grid, and the same applies to each of them.                     A box contains 9 cells in a 3x3 layout. It works the same as a column.   A row is 9 cells wide. It works the same as a colum There is no math involved. Nothing has to add up to anything else. You solve the puzzle with logic and reasoning. Click one of the digit bar "1"-"9" or press the keyboard "1"-"9", then click a blank grid you want to fill digit. If you fill a wrong digit, show the red digit. Fill a right digit , show the blue digit. You can click "Hint", then click the grid. Or stick to "Shift" click a blank grid help you fill the grid. Clear a digit grid, click "clear", then click the grid. Or stick to "Ctrl" click a blank grid. That's enough to get you solving very easy and easy puzzles. You are bound to discover the techniques, on your own. Let the brain teasing begin! Step 3: When you fill all the grid right. Congratulate!!! you win the game!!!

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