Sandwich Sudoku

Let Mellem Svær Ekspert
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
Fejl
0/3
Point
-
Tid
00:00
Nyt spil
Fremskridt0%
Let · Sandwich Sudoku Skift sværhedsgrad ovenfor ↑
Sådan spiller du Sandwich Sudoku
Standard Sudoku-regler gælder. De blå tal til venstre angiver summen af cifre, der er klemt mellem 1 og 9 i den pågældende række. De blå tal øverst angiver det samme for hver kolonne.
Fuld guide →

Ledetråde giver summen af cifre mellem 1 og 9 i hver række/kolonne

E
Let
Sandwich Sudoku Let
M
Mellem
Sandwich Sudoku Mellem
H
Svær
Sandwich Sudoku Svær
E
Ekspert
Sandwich Sudoku Ekspert

Hvad er Sandwich Sudoku?

Sandwich Sudoku placerer ledetråde langs ydersiden af gitteret. Hver ledetråd angiver summen af alle cifre, der er klemt mellem 1 og 9 i den pågældende række eller kolonne. Placeringerne af 1 og 9 varierer, så 'sandwichen' kan have 0 til 7 celler afhængigt af, hvor de lander. En ledetråd på 0 betyder, at 1 og 9 er tilstødende. En ledetråd på 35 betyder, at alle cifre 2–8 er mellem dem.

På et Blik

BegrænsningstypeUdenfor ledetråde
Typiske givne tal4–10 clue values
Sværhedsgradsvurdering ★★★★☆ 4/5
Gns. løsningstid — Let12 min
Gns. løsningstid — Mellem26 min
Gns. løsningstid — Svær52 min
Gns. løsningstid — Ekspert85 min

Sådan løser du Sandwich Sudoku

TeknikHvad det gørNiveau
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. Avanceret
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. Avanceret
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. Avanceret
Sandwich Intersection Row and column clues intersect at one cell. Combining row positions of 1 and 9 with column positions pinpoints key placements. Avanceret
Digit Forcing from Both Sides Use clues from both the row and column sides to triangulate the positions of 1 and 9 simultaneously. Avanceret

Gennemsnitlige Løsningstider

Let
12 min
Mellem
26 min
Svær
52 min
Ekspert
85 min

Daglig Sandwich Sudoku

Vil du have en frisk sandwich-puslespil hver dag? Et nyt puslespil genereres ved hvert besøg på hver sværhedsgrad, så du kan gøre Sandwich Sudoku til en del af din daglige rutine — spil et let opvarmning med din morgenkaffe eller tag fat på en ekspertgitter når du har tid til at tænke. For en fælles daglig gåde med globale ranglister, prøv Daglig Sudoku-udfordring, hvor hver spiller løser det samme bræt, og tider sammenlignes på leaderboardet.

Ofte stillede spørgsmål

Hvad er 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 — 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.
Hvad betyder en sandwich-ledetråd på 0?
A clue of 0 means no digits are sandwiched between the 1 and 9 — 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 2–8, 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 10–20 minutes. Medium puzzles run 20–35 minutes. Hard puzzles can take 45–75 minutes, and expert puzzles often exceed 90 minutes. The key bottleneck is working out 1/9 positions — once you pin those down, the rest of the grid often resolves quickly.
Sandwich Sudoku
Sandwich Sudoku Let Sandwich Sudoku Mellem Sandwich Sudoku Svær Sandwich Sudoku Ekspert
Prøv også
Killer Sudoku
Both are sum-deduction puzzles at heart — killer's 45 rule and sandwich's crust sums exercise the same arithmetic.
Skyscraper Sudoku
Outside clues again, but read as building visibility instead of sums — the same edge-of-grid deduction style.
Udenfor Sudoku
The gentlest outside-clue cousin: border digits simply belong in the nearest three cells, no arithmetic required.
Daglig udfordring
Lær Sandwich Sudoku
Sådan spiller du Sandwich Sudoku Brug af noter Alle Varianter