Arrange the heights
Fill every row and column with each height exactly once. Four-by-four puzzles use 1–4; the harder five-by-five boards use 1–5. The numbers represent building heights rather than sums.
Skyscrapers
Getting your game ready…
How to play
Look from the clue edge
An outside clue counts the buildings visible looking along that line. A taller building hides any shorter one behind it. For example, heights 2, 1, 4, 3 show two buildings from the left: the two and the four. A blank edge adds no visibility rule.
Keep possibilities separate
Select a cell and enter a height with the number buttons or keys. Arrows move the selection. Notes or N toggles candidates on empty cells; Delete, Backspace or 0 clears an answer and its notes. Z undoes a change. All row, column and visible-height clues must agree to finish.
Strategy
Start with a clear view
A clue of one puts the tallest building nearest that edge. A clue equal to the board size requires heights in increasing order. Use these strong views before choosing a number from a less restrictive clue.
Read the opposite edge
A row that fits one clue may still show too many buildings from the other side. Compare both views, then remove candidates already used in crossing columns. Visibility and number placement work together.
About the game
A skyline made of numbers
Six authored puzzles combine ordinary row-and-column placement with the view from outside the board. The clues describe what can be seen, so a correct line depends on its order as well as its set of heights. Completed puzzles and your last choice are remembered; reopening starts that board fresh. After solving, Undo lets you reconsider, while Next puzzle is a deliberate choice.