Skyscraper Sudoku

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Erros
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Pontuação
-
Tempo
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Novo Jogo
Progresso0%
Fácil · Sudoku Arranha-céu Altere a dificuldade acima ↑
Como jogar Skyscraper Sudoku
As regras padrão do Sudoku se aplicam. Cada número de pista azul informa quantos dígitos são visíveis olhando para a grade a partir dessa borda — um dígito é visível apenas se for maior que todos os dígitos anteriores nessa direção.
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Pistas externas mostram quantos 'edifícios' são visíveis a partir dessa borda.

O Que É Skyscraper Sudoku?

Skyscraper Sudoku imagina cada dígito como um prédio dessa altura. Pistas fora da grade indicam quantos prédios você pode ver olhando daquela borda para dentro — um prédio mais alto bloqueia todos os prédios mais baixos atrás dele. Uma pista de 1 significa que o primeiro prédio deve ser um 9. Uma pista de 9 significa que os prédios estão dispostos em ordem estritamente crescente (1,2,3,4,5,6,7,8,9). Esta variante requer tanto lógica de Sudoku quanto raciocínio de permutação.

De Relance

Tipo de restriçãoDicas Externas
Pistas típicas4–10 clue values
Classificação de dificuldade ★★★★☆ 4/5
Tempo médio de resolução — Fácil12 min
Tempo médio de resolução — Médio25 min
Tempo médio de resolução — Difícil50 min
Tempo médio de resolução — Especialista80 min

Como Resolver Skyscraper Sudoku

TécnicaO Que Ela FazNível
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. Avançado
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. Avançado
Permutation Enumeration For each clue value V, enumerate all permutations of 1–9 that give exactly V visible buildings. Cross-reference opposite-edge clues. Avançado
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. Avançado
Multi-Edge Constraint Combine the clue from one edge with the opposite edge's clue. Both must be simultaneously satisfiable. Avançado

Tempos Médios de Resolução

Fácil
12 min
Médio
25 min
Difícil
50 min
Especialista
80 min

Perguntas Frequentes

O que é 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.
Experimente Também
Sudoku Externo
Both decode digits written around the border — placement windows here, visibility counts there.
Sandwich Sudoku
Another grid solved from the margins, swapping visibility logic for sums between the 1 and the 9.
Little Killer Sudoku
Outside clues turned diagonal: arrows fire sum totals across the grid instead of counting buildings down a line.
Desafio Diário