Svær Skyscraper Sudoku
Ledetråde uden for gitteret tæller, hvor mange bygninger der er synlige, når man kigger ind fra den side (højere bygninger blokerer for kortere).
Svær Skyscraper Sudoku. Mellemklasse ledetrådsværdier tillader mange permutationer — prioriter at placere ciffer 9 først, arbejd derefter nedad.
3
3
3
3
4
2
2
4
1
5
2
2
3
1
4
4
2
4
6
7
8
8
5
6
7
2
5
1
5
2
3
7
3
1
1
5
6
9
3
3
9
5
4
8
4
1
2
4
2
4
3
2
3
3
3
4
2
4
1
5
2
3
5
Hvad er Skyscraper Sudoku?
Sværhedsgrad
★★★★☆
4/5
Begrænsningstype
Udenfor ledetråde
Typiske Givne Tal
4–10 clue values
Gns. Løsning (Svær)
50 min
Løsningsteknikker for Svær niveau
| Teknik | Beskrivelse | Niveau |
|---|---|---|
| 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. | Begynder |
| 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. | Begynder |
| Permutation Enumeration | For each clue value V, enumerate all permutations of 1–9 that give exactly V visible buildings. Cross-reference opposite-edge clues. | Mellemniveau |
| 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. | Mellemniveau |
| Multi-Edge Constraint | Combine the clue from one edge with the opposite edge's clue. Both must be simultaneously satisfiable. | Avanceret |
Klar til den ultimative test? Prøv Ekspert Skyscraper Sudoku — de sværeste puslespil på Spil Sudoku.
Teknikker at mestre på Svær
- Hidden Pairs technique — Permutation pruning removes mid-height candidates unevenly — recount boxes along heavily-clued edges, where hard skyscraper grids tuck their pairs.
- X-Wing-teknik — Visibility counts pin 9 and 8 to two cells in many rows, which is X-Wing fuel — hard skyscraper puzzles expect you to fish the two tallest digits.
Gennemsnitlig Løsningstid efter Sværhedsgrad
Let
12 min
Mellem
25 min
Svær
50 min
Ekspert
80 min
Vil du have en fuld gennemgang af regler, strategier og løsningstrin?
Sådan spiller du Skyscraper Sudoku →
Relaterede varianter
Udenfor Sudoku
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.
Ofte stillede spørgsmål — Svær Skyskraber Sudoku
Flere spørgsmål? Se den fulde Skyscraper Sudoku guide.