Sukar Skyscraper Sudoku
Petunjuk di luar grid mengira berapa banyak bangunan yang kelihatan apabila dilihat dari sisi tersebut (bangunan yang lebih tinggi menghalang yang lebih pendek).
Sukar Skyscraper Sudoku. Nilai petunjuk julat pertengahan membenarkan banyak pilih atur — utamakan meletakkan digit 9 dahulu, kemudian kerja ke bawah.
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
Apakah Skyscraper Sudoku?
Kesukaran
★★★★☆
4/5
Jenis Kekangan
Petunjuk Luar
Biasa Diberi
4–10 clue values
Purata Selesaikan (Sukar)
50 min
Teknik Penyelesaian untuk Tahap Sukar
| Teknik | Penerangan | Tahap |
|---|---|---|
| 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. | Pemula |
| 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. | Pemula |
| Permutation Enumeration | For each clue value V, enumerate all permutations of 1–9 that give exactly V visible buildings. Cross-reference opposite-edge clues. | Pertengahan |
| 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. | Pertengahan |
| Multi-Edge Constraint | Combine the clue from one edge with the opposite edge's clue. Both must be simultaneously satisfiable. | Lanjutan |
Bersedia untuk ujian muktamad? Cuba Pakar Skyscraper Sudoku — teka-teki paling sukar di Jom Main Sudoku.
Teknik untuk Dikuasai pada Sukar
- Hidden Pairs technique — Permutation pruning removes mid-height candidates unevenly — recount boxes along heavily-clued edges, where hard skyscraper grids tuck their pairs.
- Teknik X-Wing — 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.
Purata Masa Selesaikan mengikut Kesukaran
Mudah
12 min
Sederhana
25 min
Sukar
50 min
Pakar
80 min
Nak panduan lengkap peraturan, strategi, dan langkah penyelesaian?
Cara Bermain Skyscraper Sudoku →
Varian Berkaitan
Outside Sudoku
Both decode digits written around the border — placement windows here, visibility counts there.
Sudoku Sandwich
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.
Soalan Lazim — Sukar Sudoku Pencakar Langit
Lebih soalan? Lihat penuh Panduan Skyscraper Sudoku.