Skyskraper Sudoku
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Enkel · Skyscraper Sudoku
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Slik spiller du Skyscraper Sudoku
Standard Sudoku-regler gjelder. Hvert blått hintnummer forteller deg hvor mange sifre som er synlige når du ser inn i rutenettet fra den kanten — et siffer er synlig bare hvis det er større enn alle sifre før det fra den retningen.
Full guide →
Utenforstående ledetråder viser hvor mange 'bygninger' som er synlige fra den kanten.
Skyskraper Sudoku Enkel
Skyskraper Sudoku Middels
Skyskraper Sudoku Vanskelig
Skyskraper Sudoku Ekspert
Hva er Skyskraper Sudoku?
Skyscraper Sudoku forestiller seg hvert siffer som en bygning av den høyden. Ledetråder utenfor rutenettet indikerer hvor mange bygninger du kan se når du ser fra den kanten innover — en høyere bygning blokkerer alle lavere bygninger bak seg. En ledetråd på 1 betyr at den første bygningen må være en 9. En ledetråd på 9 betyr at bygningene er arrangert i strengt stigende rekkefølge (1,2,3,4,5,6,7,8,9). Denne varianten krever både Sudoku-logikk og permutasjonsresonnement.
På et øyeblikk
| Begrensningstype | Utenfor-ledetråder |
| Typiske gitte tall | 4–10 clue values |
| Vanskelighetsgradsvurdering | ★★★★☆ 4/5 |
| Gj.sn. løsningstid — Enkel | 12 min |
| Gj.sn. løsningstid — Middels | 25 min |
| Gj.sn. løsningstid — Vanskelig | 50 min |
| Gj.sn. løsningstid — Ekspert | 80 min |
Hvordan løse Skyskraper Sudoku
| Teknikk | Hva det gjør | Nivå |
|---|---|---|
| Clue 1 Forces 9 First | A visibility clue of 1 means the first building from that edge must be a 9. All shorter buildings behind it are hidden. | Avansert |
| Clue 9 Forces Ascending Order | A clue of 9 means all buildings are visible, so digits are in strictly ascending order from that edge: 1, 2, 3, 4, 5, 6, 7, 8, 9. | Avansert |
| Permutation Enumeration | For each clue value V, enumerate all permutations of 1–9 that give exactly V visible buildings. Cross-reference opposite-edge clues. | Avansert |
| 9 Always Visible | The digit 9 is always visible from either edge. The digit 8 is visible only if it appears before any 9 from that edge. | Avansert |
| Multi-Edge Constraint | Combine the clue from one edge with the opposite edge's clue. Both must be simultaneously satisfiable. | Avansert |
Gjennomsnittlige løsningstider
Enkel
12 min
Middels
25 min
Vanskelig
50 min
Ekspert
80 min
Ofte stilte spørsmål
Hva er Skyscraper Sudoku?
Skyscraper Sudoku is a variant where numbers appear outside the grid on all four sides. Each number tells you how many distinct 'buildings' (digits) are visible when looking into that row or column from that side. Taller buildings hide shorter ones behind them — a larger digit blocks any smaller digit placed further into the row.
How does visibility work in Skyscraper Sudoku?
Imagine the digits in a row as buildings of different heights. Looking from one end, you can see a building only if no taller building stands between you and it. A clue of 1 means only the first building is visible, so it must be the tallest (digit 9). A clue of 9 means all buildings are visible, so the row must be in ascending order from that side.
What do extreme clue values tell me?
A clue of 1 means the first cell from that side holds a 9 — it blocks everything else. A clue of 9 means the row or column is in strictly ascending order from that direction (1,2,3,4,5,6,7,8,9). Both are immediately actionable. Mid-range clues require enumerating valid permutations.
Is Skyscraper Sudoku harder than regular Sudoku?
Yes, generally. Skyscraper clues require enumerating valid digit permutations for each row and column, which is more combinatorially intensive than classic Sudoku elimination. Easy puzzles are accessible; hard and expert puzzles require tracking visibility across multiple rows and columns simultaneously.
What is the best first strategy for Skyscraper Sudoku?
Start with clues of 1 and 9 — they immediately fix a digit or fully determine the order of a row. Then look for clues of 2, which constrain the position of the 9 significantly. Combine skyscraper deductions with standard Sudoku box and row/column scans.
How long does Skyscraper Sudoku take to solve?
Easy puzzles take 8–20 minutes. Medium puzzles run 20–40 minutes. Hard puzzles average 40–75 minutes and expert puzzles often exceed 90 minutes. Fast solvers develop the ability to enumerate valid visibility permutations quickly without writing them all out.