Hur man spelar Skyscraper Sudoku
Yttre ledtradar visar hur manga 'byggnader' som ar synliga fran den kanten.
Reglerna
Standard Sudoku-regler gäller: fyll varje rad, kolumn och 3×3-ruta med siffrorna 1–9, var och en förekommer exakt en gång.
Skyscraper Sudoku föreställer sig varje siffra som en byggnad av den höjden. Ledtrådar utanför rutnätet anger hur många byggnader du kan se när du tittar från den kanten inåt — en högre byggnad blockerar alla lägre byggnader bakom sig. En ledtråd på 1 innebär att den första byggnaden måste vara en 9. En ledtråd på 9 innebär att byggnaderna är arrangerade i strikt ökande ordning (1,2,3,4,5,6,7,8,9). Denna variant kräver både Sudoku-logik och permutationsresonemang.
För var detta pussel kommer ifrån, hur det jämförs med relaterade varianter och en strategisammanfattning, se vår Skyscraper Sudoku variantöversikt.
Översikt
Hur man löser Skyscraper Sudoku
Vanliga frågor
Vad är 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.