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 fractions. They represent the ratio of the two ends. For example 3/4 can stand for the following combinations of numbers in the two end cells: 3 - 4, 6 - 8, 4 - 3 and 8 - 6.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The numbers between two cells give the ratio of the digits. For example 3/4 can stand for the following combinations of numbers in the adjazent cells: 3 - 4, 6 - 8, 4 - 3 and 8 - 6.

Fill the grid with the digits 1 through 9. Each digit occurs exactly two times. Adjazent cells have different digits. The groupings marked both above and below the cells gives an increasing series of numbers.

Smaller example with the digits 1 through 4:

Puzzle:

Fill the grid with the digits 1 through 9. Each digit occurs exactly two times. Adjazent cells have different digits. The groupings marked both above and below the cells gives an increasing series of numbers.

Smaller example with the digits 1 through 4:

Puzzle:

Fill the grid with the digits 1 through 9. Each digit occurs exactly two times. Adjazent cells have different digits. The groupings marked both above and below the cells gives an increasing series of numbers.

Smaller example with the digits 1 through 4:

Puzzle:

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. In each green line the numbers are alternating larger and smaller.

Smaller example:

Puzzle:

Fill in the white cells of the grid the digits 1 through 6 so that no row and no column contains any number twice. In each row and column the numbers are alternating larger and smaller.

Smaller Example:

Puzzle:

Fill in the white cells of the grid the digits 1 through 5 so that no row and no column contains any number twice. In each row and column the numbers are alternating larger and smaller.

Fill in the grid so that every row, every column and every 3x3 box contain the digits 1 through 9. Numbers outside the grid gives the position of the maximum of the first three digits.