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Sudoku is a logic-based placement puzzle, where the object is to fill the grid so that every column, every row and every 3×3 box contains the digits 1 to 9. The puzzle starts with a partially completed grid so that there is only one solution. Sudoku is also known as also known as Number Place or Nanpure. The attraction of the Sudoku puzzle is that the rules are simple, yet complex reasoning may be required to solve the puzzle successfully. Various levels of difficulty are available. |
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There is really only one rule when solving a Sudoku puzzle. Fill in the grid so that every row, every column, and every 3 x 3 box contains the numbers 1 through 9.
A row refers to the horizontal cells. A row is made up of 9 cells. A filled in row can only contain each number once.
A column refers to the vertical cells. A column is also made up of 9 cells. A filled in column can only contain each number once. A block refers to the squares made up of 3 cells by 3 cells (9 cells). There are 9 blocks on the puzzle. A filled in block can only contain each number once. You can't change the numbers that are already filled in for you, because that would change the solution for the puzzle you're working on. Every Sudoku puzzle has only one correct solution. |
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