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Skyscrapers

Hard (6×6)

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Play Hard Skyscrapers — ThePuzzleLabs

Try this Hard Skyscrapers puzzle on ThePuzzleLabs.

00:00
Classic
1
4
2
3
2
1
3
3
2
2
1
6
2
4
4
1

How to Play Skyscrapers

Rules

  • Fill every cell with a building height from 1 to 6.
  • Each row and column must contain each height exactly once.
  • Border clues tell you how many buildings are visible from that direction.
  • Taller buildings block the view of shorter ones behind them.

Key Deductions

  • A clue of 1 means the tallest building (6) is right at the edge.
  • A clue of 6 means the buildings go in ascending order (1, 2, 3…6).
  • No clue shown? That constraint is hidden — deduce it from other clues.

Controls

  • Click a cell, then tap a number to place it.
  • Use arrow keys to navigate between cells.
  • Press N for notes/pencil mode, B for buildings view.
  • Press H for a hint.

Solve This Puzzle?

This will fill in the complete solution. The puzzle will be marked as “solved with reveal” rather than self-solved.

About hard Skyscrapers (6×6)

Hard Skyscrapers uses a 6×6 grid with no given cells. Of the 24 possible border clue positions, 14 to 20 are shown. The hidden clues force you to reason without direct information on some rows or columns. Multi-clue reasoning becomes essential at this level.

Focus on lines where both the left/top and right/bottom clues are visible. These give you the most constraints to work with. Partial placement elimination also helps: if placing height 6 in a particular cell would make it impossible to satisfy a nearby clue, then 6 cannot go there. Test candidates mentally against the clues before committing.

The 6×6 grid has 36 cells and six heights per line. Mid-range clues (2 and 3) leave many possible arrangements, which is why they are the hardest to work with. High clues (5 or 6) and low clues (1) are more constraining and should be your starting points. These puzzles are solvable without guessing. If you stall, check whether any cell has been reduced to a single candidate by elimination.