Fill in the grid so that every row, every column, and 3x3 box contains the digits 1 through 9. In the marked diagonals all digits must be different.

Fill in the grid so that every row, every column, and 3x3 box contains the digits 1 through 9. In the marked diagonals all digits must be different.

Fill in the grid so that every row, every column, every 3x3 box and both diagonals contains the digits 1 through 9. Moreover all pairs of diagonally adjazent cells must be different.

Fill in the grid so that every row, every column and 3x3 box contains the digits 1 through 9. Each marked diagonal must contain the digits 1 through the number of cells in this diagonal. (1 - 4, 1 - 6 or 1 - 9 respectively)

Fill in the grid so that every row, every column and the 3x3 boxes contain the digits 1 through 9. The green cell must be different from all yellow cells.

Fill in the grid so that every row, every column, every 3x3 box and the three colored regions contain the digits 1 through 9.

Fill in the grid so that every row, every column, every 3x3 box and the cyan cells contain the digits 1 through 9.

Fill in the grid so that every row, every column, every 3x3 box and both cyan groups contain the digits 1 through 9.

Fill in the grid so that every row, every column, every 3x3 box and both cyan groups contain the digits 1 through 9.

Fill in the grid so that every row, every column, every 3x3 box and both cyan groups contain the digits 1 through 9.