Sudoku Sandwich
0
27
25
0
0
0
17
9
8
22
12
9
0
8
9
16
6
11
5
8
1
2
6
4
3
7
9
5
1
3
6
9
9
6
9
4
8
7
5
9
7
6
2
5
9
7
2
6
5
1
9
8
3
4
5
7
Kesilapan
0/3
Skor
-
Masa
00:00
Kemajuan0%
Mudah ยท Sudoku Sandwic
Tukar kesukaran di atas โ
Cara bermain Sandwich Sudoku
Peraturan Sudoku standard terpakai. Nombor biru di sebelah kiri menunjukkan jumlah digit yang diapit antara 1 dan 9 dalam baris itu. Nombor biru di atas menunjukkan yang sama untuk setiap lajur.
Panduan penuh โ
Petunjuk memberikan jumlah digit antara 1 dan 9 dalam setiap baris/lajur
Sudoku Sandwich Mudah
Sudoku Sandwich Sederhana
Sudoku Sandwich Sukar
Sudoku Sandwich Pakar
Apakah Sudoku Sandwich?
Sandwich Sudoku meletakkan petunjuk di sepanjang luar grid. Setiap petunjuk memberikan jumlah semua digit yang diapit antara 1 dan 9 dalam row atau column itu. Kedudukan 1 dan 9 berbeza, jadi 'sandwich' boleh mempunyai 0 hingga 7 sel bergantung pada di mana ia mendarat. Petunjuk 0 bermaksud 1 dan 9 bersebelahan. Petunjuk 35 bermaksud semua digit 2โ8 berada di antaranya.
Sekilas Pandang
| Jenis kekangan | Petunjuk Luar |
| Biasa diberi | 4โ10 clue values |
| Penilaian kesukaran | โ โ โ โ โ 4/5 |
| Purata masa selesaikan โ Mudah | 12 min |
| Purata masa selesaikan โ Sederhana | 26 min |
| Purata masa selesaikan โ Sukar | 52 min |
| Purata masa selesaikan โ Pakar | 85 min |
Cara Menyelesaikan Sudoku Sandwich
| Teknik | Apa yang dilakukannya | Tahap |
|---|---|---|
| Clue 0 Means Adjacent 1 and 9 | A sandwich clue of 0 means 1 and 9 are side-by-side with nothing between them. Place this pair immediately. | Lanjutan |
| Clue 35 Means 1 and 9 at Ends | A clue of 35 = 2+3+4+5+6+7+8. All middle digits are sandwiched, placing 1 and 9 at the two ends of the row/column. | Lanjutan |
| Position Enumeration | For each clue, enumerate all valid positions of 1 and 9 such that the enclosed digits sum to the clue. Cross-reference with column clues. | Lanjutan |
| Sandwich Intersection | Row and column clues intersect at one cell. Combining row positions of 1 and 9 with column positions pinpoints key placements. | Lanjutan |
| Digit Forcing from Both Sides | Use clues from both the row and column sides to triangulate the positions of 1 and 9 simultaneously. | Lanjutan |
Purata Masa Selesaikan
Mudah
12 min
Sederhana
26 min
Sukar
52 min
Pakar
85 min
Sudoku Sandwic Harian
Nak teka-teki sandwich segar setiap hari? Teka-teki baru dijana pada setiap lawatan pada setiap kesukaran, jadi anda boleh jadikan Sandwich Sudoku sebahagian daripada rutin harian anda โ main pemanasan mudah dengan kopi pagi anda atau cuba grid pakar apabila anda mempunyai masa untuk berfikir. Untuk teka-teki harian yang dikongsi dengan kedudukan global, cuba Cabaran Sudoku Harian, di mana setiap pemain menyelesaikan papan yang sama dan masa dibandingkan pada papan pendahulu.
Soalan Lazim
Apakah Sandwich Sudoku?
Sandwich Sudoku is a variant where clue numbers appear outside the grid, one per row and one per column. Each clue tells you the sum of all digits that appear between the 1 and the 9 in that row or column. Standard Sudoku rules apply throughout.
How do I use the sandwich clues?
First, find the positions of the 1 and 9 in each row or column โ every other digit between them must sum to the outside clue. A clue of 0 means the 1 and 9 are adjacent. A clue equal to the maximum possible sum (e.g., 35 for a 7-cell sandwich) tells you the 1 and 9 are at the ends. Work from the most constrained clues first.
Apakah maksud sandwich clue 0?
A clue of 0 means no digits are sandwiched between the 1 and 9 โ they must be directly adjacent to each other. This is one of the most powerful clues because it immediately tells you where 1 and 9 can and cannot be placed relative to each other in that row or column.
Is Sandwich Sudoku harder than regular Sudoku?
Yes, generally. Sandwich Sudoku provides very few pre-filled digits inside the grid. Almost all deductions flow from working out where 1 and 9 can sit and what sums are achievable. The logic is more algebraic than classic Sudoku, which many players find both more challenging and more satisfying.
Can the 1 and 9 be at the ends of a row?
Yes. If the 1 is in column 1 and the 9 is in column 9 (or vice versa), the sandwiched digits are columns 2โ8, giving a maximum possible sum of 2+3+4+5+6+7+8 = 35. Extreme clue values like this immediately fix the positions of both the 1 and the 9.
How long does Sandwich Sudoku take to solve?
Easy puzzles typically take 10โ20 minutes. Medium puzzles run 20โ35 minutes. Hard puzzles can take 45โ75 minutes, and expert puzzles often exceed 90 minutes. The key bottleneck is working out 1/9 positions โ once you pin those down, the rest of the grid often resolves quickly.