Skyline Towers
Each cell holds a tower. Every row and column uses each height exactly once, and the numbers around the edge say how many towers you would see looking in from there — taller towers hide shorter ones behind them.
Fill the city with towers of height 1–4. Each edge number says how many towers can be seen from there.
FreeOn this device
Solved on this device: 0 of 12. Every board has exactly one answer, checked by a solver.
Controls
- Focus a cell with a tap or the arrow keys and type a height, or use the number buttons under the board.
- Notes (or the N key) switches to pencil marks; Backspace or Erase clears a cell.
- Check lists broken rules, Hint explains one step and Apply hint carries it out, Side view draws the focused row as a skyline.
The rules
- Each row and column contains every height from 1 to the board size exactly once.
- A tower is visible from an edge when it is strictly taller than every tower in front of it. An empty clue position means no constraint.
- A clue of 1 means the tallest tower is nearest that edge; a clue equal to the board size means the line rises 1, 2, 3 … from that edge.
Scoring, saving and limits
Solved means every rule holds — the game checks the clues and rows themselves. A hint that reveals a height marks the run as assisted.
Your heights, notes, undo history and solved boards are kept on this device only. Download a backup to move them.
Twelve boards (six 4×4, six 5×5), each checked by a solver to have exactly one answer. 6×6 is not offered yet.
Questions
- Why does a 1 clue always mean the tallest tower?
- If anything shorter stood first, the tallest tower behind it would also be visible, making at least two.
- Does an equal height block the view?
- There are no equal heights in a line — every height appears once — so a tower is seen only if it is taller than everything in front.
- What if my answer differs from the intended one?
- The board is checked against the rules, not a stored answer. Every board here has only one answer, so a correct grid is that answer.