In each row and column, there are eight skyscrapers, all of different sizes, ranging in height from 1 to 8 units.

The numbers outside the grid show how many buildings can be seen when looking towards the grid. So, for example, the 2 at the beginning of the fifth row means that the following combinations could be found in that row:
51874362
64873125

The small figures in the shaded rectangles show the total of the numbers in that rectangle.

"The shaded rectangles are similar to those found in "Killer Sudoku".

					7
	21	12				6	15
		15	3				10
			21	13		6			7
	6	10					11	11
2				5
						19			1
			8		15		5	4
	10		12