Fill the grid with the digits 1 to 6. The digits represent the height of the skyscraper in each cell. Each row, column and marked diagonal has exactly one of each digit. The clues along the edges tell you how many Skyscrapers you can see from that vantage point.
Fill in the grid so that every row, every column and both diagonals contain the digits 1 through 9. Each blue line marks that the sum of the two neighbored cells is 11.
Fill the grid with the digits 1 to 6. The digits represent the height of the skyscraper in each cell. Each row, column, 3x3-box and marked diagonal has exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point.
Fill in the grid so that every row, every column, the cyan cells and both diagonals contain the digits 1 through 9. (There aren't any 3x3 boxes.)
Fill in the grid so that every row, every column and both diagonals contain the digits 1 through 8.
Fill in the grid so that every row, every column and both diagonals contain the digits 1 through 7.