How to Play Skyscraper Sudoku
Outside clues show how many 'buildings' are visible from that edge
The Rules
Standard Sudoku rules apply: fill every row, column, and 3×3 box with the digits 1–9, each appearing exactly once.
Skyscraper Sudoku imagines each digit as a building of that height. Clues outside the grid indicate how many buildings you can see looking from that edge inward — a taller building blocks all shorter buildings behind it. A clue of 1 means the first building must be a 9. A clue of 9 means the buildings are arranged in strictly increasing order (1,2,3,4,5,6,7,8,9). This variant requires both Sudoku logic and permutation reasoning.
At a Glance
How to Solve Skyscraper Sudoku
Common Questions
When is a building 'visible'? ▾
A building is visible if no taller building stands between it and the viewing edge.
Does 9 always count as visible? ▾
Yes — 9 is always visible since it's the tallest building.
Do all rows and columns have clues? ▾
Not necessarily — some positions outside the grid are blank, providing no constraint for that row or column.