Svær Outside Sudoku
Ledetråde uden for gitteret giver de første tre tal, der stødes på i den pågældende række eller kolonne — men ikke deres rækkefølge.
Svær Udenfor Sudoku. Færre kant-ledetråde og strammere interaktioner — forvent flertrins-deduktioner og omhyggelig blyantsnotat arbejde.
7
5
9
5
9
2
7
1
8
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1
7
9
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7
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2
6
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6
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9
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5
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7
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9
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1
2
8
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7
3
5
8
8
7
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9
5
Hvad er Udenfor Sudoku?
Sværhedsgrad
★★★☆☆
3/5
Begrænsningstype
Udenfor ledetråde
Typiske Givne Tal
28–36 given + 4×9 outside clues
Gns. Løsning (Svær)
36 min
Løsningsteknikker for Svær niveau
| Teknik | Beskrivelse | Niveau |
|---|---|---|
| Clue-Zone Mapping | Each outside digit must appear in the nearest 3 cells of its row or column. Map all outside clues to their zones immediately. | Begynder |
| Cross-Side Reasoning | If left clue digit X must be in cols 1–3, and right clue digit X is in the same row, that row already places X — the other side confirms its column. | Mellemniveau |
| Box-Side Interaction | An outside clue for a row interacts with the box containing cols 1–3. If the row's box is heavily constrained, the outside digit's position may be forced. | Mellemniveau |
| Digit Elimination from Clues | When a clue digit is placed in the zone, eliminate it from the rest of the zone row/col using standard Sudoku logic. | Mellemniveau |
| Dual-Side Chains | Combine left and right clues for the same row: both digits restrict the same three columns from opposite ends, leaving the middle box fully determined. | Avanceret |
Klar til den ultimative test? Prøv Ekspert Udenfor Sudoku — de sværeste puslespil på Spil Sudoku.
Teknikker at mestre på Svær
- Hidden Pairs technique — Opposite-side clues squeeze a row from both ends, stripping middle candidates — recount the centre box of heavily-clued rows, where hard outside grids hide their pairs.
- X-Wing-teknik — Clue windows fix which third of each line a digit occupies; when two rows confine a digit to the same two columns inside their windows, the X-Wing clears both columns.
Gennemsnitlig Løsningstid efter Sværhedsgrad
Let
8 min
Mellem
18 min
Svær
36 min
Ekspert
65 min
Vil du have en fuld gennemgang af regler, strategier og løsningstrin?
Sådan spiller du Udenfor Sudoku →
Relaterede varianter
Skyscraper Sudoku
The next step in border-clue logic — outside numbers become visibility counts that constrain entire row orderings.
Sandwich Sudoku
Border clues with arithmetic teeth: each one is the sum of the digits trapped between 1 and 9.
Killer Sudoku
Moves the clue layer inside the grid as summed cages — a natural graduation from window placement to sum deduction.
Ofte stillede spørgsmål — Svær Outside Sudoku
Flere spørgsmål? Se den fulde Udenfor Sudoku guide.