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Sudoku

You can use this site to play around with Sudoku and if you have problems solving it, you can let the program do it for you.

Sudoko page, version 2024.02.11 - 21:30

The Sudoku rules are fairly simple, but the puzzle can be quite hard. A Sudoku-board comprises of a 9*9 grid that is divided by 9 squares, each containing 3 rows and 3 coloumns. Your task is to fill all the cells in the board according to the simple rules below. So here they are:

  • Sudoku grid consists of 9x9 spaces.
  • You can use only numbers from 1 to 9. 0 (zero) will erase the cell
  • Each 3×3 block can only contain numbers from 1 to 9.
  • Each vertical column can only contain numbers from 1 to 9.
  • Each horizontal row can only contain numbers from 1 to 9.
  • Each number in the 3×3 block, vertical column or horizontal row can be used only once.
  • The game is over when the whole Sudoku grid is correctly filled with numbers.

Every time you type a number its validity will be checked according to the rules above. If it is not valid the cell will continue to be blank and an error message will be written.

There are six buttons that enable you to control the Sudoku-program.

MakeStart with an empty board and press Make in order to start typing a new Sudoku puzzle. The numbers you type will be blue and saved so you can reset your play back to the start of the game.
Play When you have finished entering the puzzle you can press Play and can now start solving the Sudoku. The numbers you type will be orange so you can see the difference between the number you typed during the "Make" session and the "Play" session.
Solve Whether you give up on solving the Sudoku or you just want to see the solution, you can press the Solve and the program will present the solution to you.
Back You may regret a typed number. If so you can press the Back button. It will remove your latest number in the grid so you can continue soloving the Sudoku correctly.
Reset You can also totally regret the typings you have done to solve the puzzle. You then press the Reset that will bring you back to start of you Sudoku-puzzle.
Clean Press the Clean button in order to clean the board so you can start all over again.

Here are some links to Sudoku sites, so you can try them first.

Or you can just type in "sudoku" in your preferred search engine