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The Sandwich Sudoku also called Between 1 and 9 Sudoku follows the same rules of classic sudoku but has extra clues outside the grid. The clues are the sum of the digits between 1 and 9 in that row or column.
If you need extra help to solve this puzzle, then check our page with Between 1 and 9 Sudoku techniques
Look HERE for a list of all the possible combinations with the numbers 5 - 35.
|SOLVING SANDWICH SUDOKU|
LEV: Choose level to 4.
PUZ: enter the puzzle number of your choice. Between brackets is the number of puzzles.
START: choose this to load the puzzle.
|COLOR CELL:||Click on a cell to color it yellow or back to white. You can use this for excluding cell to be 1 or 9.|
|ROW:||In front of every SUM you will find the missing digits for that row.|
|COLUMN:||Above every SUM you will find the missing digits for that column.|
|BOXES (1-9):||At the top left are 9 boxes with the missing digits of the 9 subgrids.|
|NUMBER OF DIGITS:||At the top you can see how often a number has already been entered and where.|
|PLAY SANDWICH SUDOKU|
|ENTERING DIGITS:||On the left, in the first column, choose the digit(s) you want to enter and then click on the sudoku cell of your choice. You can enter 1 or more digits. Choose one digit and click on the empty cell (=bottom left corner) to place one digit in small size.|
|BUTTON NEXT:||Choose NEXT button to jump to the next puzzle.|
|BUTTON ✓:||Choose ✓ button to check the puzzle. All the correct numbers turn GREEN just like the initial numbers and now can not be changed anymore.|
|BUTTON SOL:||Click on the SOL button to display the puzzle solution.|
Source puzzles: Cracking The Cryptic: puz 1 to 6. The other puzzles I have created myself.