Skyscrapers Puzzle

Skyscrapers is a building placing puzzle consisting a NxN grid. The aim to to place skyscraper in each square with a height denoted by a number. Each row and column can only have one skyscraper of a certain height.

There are clues placed around the grid as numbers. A clue denotes number of skyscaper(s) seen from that side.

How to play: By default puzzle option is selected at the top. Select a sqaure in the grid and then click one of the number options to fill it. One additional option is there for clearing a square.

The other two options at the top are to add notes in a square. One for possible options for a square (in green text), and second for the possible exclusions for the square (in red text).