### Even-Odd Sudoku

**Even-Odd Sudoku**: fill in the grid so that every row, every column, and every **3 x 3** box contains the digits 1 through 9. White cells must contain odd digits, gray cells must contain even digits.

Sometimes not all even or odd digits are marked in the task. Use the check box **Not all gray cells are marked** for such sudokus.

The formats of sudoku files:

**EOS** - Even-Odd Sudoku (9 x 9);
**EOS6** - Even-Odd Sudoku (6 x 6);
**EOS8** - Even-Odd Sudoku (8 x 8).