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A First Odd Sudoku also has numbers outside the grid. The rules are simple. This is the first odd number seen from that direction. If, for example, the number 1 is outside the grid, than number 1 must be the first odd number.
Numbers outside the grid can only be preceded by even numbers and can therefore be entered on the 1st to 5th place. The 6th place is not possible becasue there are only 4 even numbers.
|SOLVING FIRST ODD SUDOKU|
LEV: choose a level of difficulty. Between brackets is the number of puzzles per level.
PUZ: enter the puzzle number of your choice.
START: choose this to load the puzzle.
|ROW:||Next to 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.|
|CLUESS:||Click on a CLUE outside the grid to make it white. You can do this when you have found they right cell for that clue.|
|PLAY FIRST ODD SUDOKU|
|Entering digit:||On the left, cells in white color, choose the digit(s) you want to enter and then click on the sudoku cell of your choice. Choose a digit and the empty cell below digit 9 if you want to place 1 digit in small size.|
|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.|