Play Skyscraper Sudoku Online Free

Play Skyscraper Sudoku online for free. Clues around the grid tell you how many 'buildings' you can see from that direction, where taller buildings block shorter ones.

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How to Play Skyscraper Sudoku

  1. Standard Sudoku rules apply.
  2. Digits represent building heights (1 = shortest, 9 = tallest).
  3. Clues outside the grid count how many buildings are visible from that direction.
  4. A taller building blocks the view of all shorter buildings behind it.
💡 Pro Tip
A clue of 1 means the first cell must be 9 (tallest). A clue of 9 means digits must be in ascending order (1,2,3,...,9).

Frequently Asked Questions

What does a Skyscraper clue of 1 mean?

Only one building is visible — so the first cell from that direction must be 9, the tallest, blocking everything behind it.

What does a clue of 9 mean?

All nine buildings are visible, which only happens when they're in strictly ascending order from that direction — 1, 2, 3, …, 9.

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▶ Play Skyscraper Sudoku