In the puzzle on the left you need to place a number between 1 and 4 in each 2x2 square so that every row, every column and 2x2 square contains the number 1 to 4. In the puzzle on the right, place a number between 1 and 6 in each 3x2 rectangle so that each row, each column and each 3x2 rectangle contains the numbers 1 to 6. |