Fill the grid using the numbers 1 to 9. Each number must appear just once in every row, column and 3x3 box.

Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9.

Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9.

Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9.

Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9.

Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9.

Fill the grid so that every row, every column and every 3x3 box contains the numbers 1 to 9.

Normal Sudoku rules apply, except the numbers in the cells contained within grey lines add up to the figures in the corner. No number can be repeated...

Normal Sudoku rules apply, except the numbers in the cells contained within grey lines add up to the figures in the corner. No number can be repeated...

Normal sudoku rules apply, except the numbers in the cells contained within dotted lines add up to the figures in the corner. No number can be...