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Skyscrapers (Diagonal) (81)
Other names: Skyscrapers with Diagonals
Instruction:
Place a number from 1 to X (integers only) into each cell so that each number appears exactly once in each row and column. (X is the number of cells in each row.) Each number represents a skyscraper of its respective height. The numbers outside the grid indicate how many skyscrapers can be seen in the respective row or column from the respective direction; smaller skyscrapers are hidden behind higher ones. Some numbers may already be filled in for you.
The skyscrapers along each main diagonal must be all different.