Sudoku Variants
Different Grid Sizes/Shapes

 
   
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Many people incorrectly spell Sudoku as "Suduko" or "Sudoko". The correct English spelling is Sudoku - which means "single number" in Japanese
 
 
     
Suduko Review   >   Playing Sudoku   >   Variants   >   1  2  3  4  5  6  7
Related Pages:
1: Sudoku Variants

2: Different Symbols

3: Different Grid Sizes/Shapes

4: Sudoku X

5: Samurai Sudoku

6: Killer Sudoku

7: Multiplayer Sudoku

Another variation on Sudoku is to vary the number of cells/boxes that make up the Sudoku grid...

Sticking with Sudoku grids consisting of square boxes, the following variations are possible:
  • 4 X 4 grid of cells, consisting of four 2 X 2 boxes. 4 symbols (usual convention - the digits 1 to 4) are needed to solve these.

    Note: These puzzles tend to be very easy to solve, and most suitable for kids

    Where to find:


  • Classic Sudoku - 9 X 9 grid of cells, consisting of nine 3 X 3 boxes. 9 symbols (usual convention - the digits 1 to 9) are needed to solve these.

    Where to find:


  • 16 X 16 grid of cells, consisting of sixteen 4 X 4 boxes. 16 symbols (usual convention - the digits 0 to 9, and letters A through F) are needed to solve these.

    Where to find:


  • 25 X 25 grid of cells, consisting of twenty-five 5 X 5 boxes. 25 symbols (usual convention - the digits 0 to 9, and letters A through O) are needed to solve these.

  • 36 X 36 grid of cells, consisting of thirty-six 6 X 6 boxes. 36 symbols (usual convention - the digits 0 to 9, and letters A through Z) are needed to solve these.

  • ...And so on. For example, it is possible to create (and solve) 49 X 49 Sudokus, or 64 X 64 Sudokus, or larger still Sudokus - but so many different symbols are required that it become impractical to do with them pen and paper (even using digits 0 through 9, and A to Z upper-case letters, and a to z lower-case letters, doesn't give enough symbols for 64X64 Sudoku puzzles).

It's also possible, to use rectangular boxes to make up the Sudoku grid, for example:
  • 6 X 6 grid of cells, can be made from six 2 X 3 (or 3 X 2) boxes. 6 symbols (usual convention - the digits 1 to 6) are needed to solve these.

    Note: These puzzles tend to be fairly easy to solve, and generally suitable for kids, Sudoku beginners, etc.

    Where to find:


  • 12 x 12 grid of cells, consisting of twelve 3 X 4 (or 4 X 3) boxes. 12 symbols (usual convention - digits 0 to 9, and letters A and B) are needed to solve these.

    Where to find:

    • Do You Sudoku? (electronic game)
    • Sunday Times (British newspaper) [last checked January 2006]


Finally, there isn't any reason why the boxes that make up a Sudoku must be squares or rectangles:
  • Jigsaw Sudoku - a 9 X 9 grid of cells solved using the numbers 1 through 9. As with Classic Sudoku each row, column or box must contain each of the digits 1 through 9 - except the boxes are strange irregular shapes.

    Where to find:


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