Fill in the grid so that every line (in both with arrows marked directions) contains all the numbers from 1 to the length of that particular line.
Fill in the grid so that every row/column contains all the numbers from 1 to the length of that particular row/column. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage.
Fill in the grid the digits 1 through 7 so that no row, column, and diagonal contains any digits more then once. Different colors help to spot the diagonals.