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Free Skyscrapers (Towers) Online

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Skyscrapers is a logic puzzle game that involves placing buildings of different heights in a grid. The objective is to fill in the grid with buildings so that every possible height appears exactly once in each row and column (like in Sudoku), creating a cityscape where the number of visible skyscrapers from a given direction matches the clue provided.

Fill in the grid with skyscrapers whose heights range from 1 to the grid size, so that every possible height appears exactly once in each row and column (like in Sudoku), and so that each clue around the edge counts the number of skyscrapers that are visible when looking into the grid from that direction. (Taller skyscrapers hide shorter ones behind them. So the sequence 2,1,4,3,5 would match a clue of 3 on the left, because the 1 is hidden behind the 2 and the 3 is hidden behind the 4. On the right, it would match a clue of 1 because the 5 hides everything else.)

To place a skyscraper, click in a square to select it, then type the desired height on the keyboard. To erase a skyscraper, click to select a square and then press Backspace.

Right-click in a square and then type a number to add or remove the number as a pencil mark, indicating skyscraper heights that you think might go in that square. Click on the puzzle and press the M key to fill every square with a full set of pencil marks.

Courtesy of Simon Tatham's Puzzle Collection via the MIT license.

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