Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Some rows and columns have numbers. They represent the difference of the two ends.

Fill in the grid the digits 0 through 9. There are no cells with a common line and consecutive digits. (0 is consecutive with 1, not with 9.)

Fill in the grid so that every ring and every pair of neighboured circle segments contains the digits 1 through 8. There are no neighbouring cells with consecutive digits.

Fill in the grid so that every ring, spoke and 3x3 box contains the digits 1 through 9. There are no neighbouring cells with consecutive digits.

Fill in the grid with the digits 1 through 9 so that each digit appears three times. Numbers connected with a line are neither identical, nor consecutive.

Fill in the grid with the digits 1 through 9 so that each digit appears two times. Numbers connected with a line are neither identical, nor consecutive.

Fill in the grid with the digits 1 through 9 so that each digit appears two times. Numbers connected with a line are neither identical, nor consecutive.

Fill in the grid with the digits 1 through 9 so that each digit appears two times. Numbers connected with a line are neither identical, nor consecutive.

Fill in the grid so that every row, and every column contains the digits 1 through 7. All neighbouring cells with consecutive digits are connected by a line. If the digits are not consecutive there is no line.