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.

The first sudokus published in Dell Pencil Puzzles & Word Games (1979) were exemples of this sudoku variant. Here a puzzle created by me.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Each of the numbers in circles below goes into one of the circle boxes in the diagram (not necessarily in the order given).

Every bold outlined section must contain the consecutive integers from 1 to the quantity of cells in that section inclusive. Adjazent cells must be different, even if they are diagonally adjazent. In rows or columns the digits can be repeated.