Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The colored areas mark magic squares, i. e., the sums of any row, any column and both main diagonals in these areas are always the same.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The colored areas mark magic squares, i. e., the sums of any row, any column and both main diagonals in these areas are always the same.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. There is a magic square in this sudoku, i.e. there is a area of 3x3 cells in this grid where the sums of any row, any column and both main diagonals in this area are always the same.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The blue area marks a magic square, i. e., the sums of any row, any column and both main diagonals in this area are always the same.

Fill in the grid so that every row, every column and the 3x3 boxes contain the digits 1 through 9. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage. All eight green lines must use no more then four digits. Each line must use three of these digits.

Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. The numbers tell you the sum of the marked cages. The clues along the edges tell you how many skyscrapers you can see from that vantage point. The cells on both diagonals have odd digits. In cages there can't be the same digit repeated.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage. The colours say you whether an individual cell is even (green cells) or odd (yellow cells).

Fill in the grid so that every row, every column, every 3 x 3 box and both diagonals contain the digits 1 through 9. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage.

Fill the grid with the digits 1 to 9. Each row, column, 3x3-box and both diagonals have exactly one of each digit. The numbers tell you the sum of the marked cages. The coloured points tell you whether the sums in the marked cages are odd (yellow point) or even (green point). In cages there can't be the same digit repeated.

Fill in the grid so that every row, every column, every 3x3 box and both diagonals contain the digits 1 through 9. A red arrow means that the digits are going up till they hit this number and for a cyan arrow they go down till they hit this particular number.

For example:

135247896 could get a red arrow with a 5 or a cyan arrow with a 1.

932415678 could get a red arrow with a 9 or a cyan arrow with a 2.