Ekspert XV Sudoku
X markerer celler, der summer til 10; V markerer celler, der summer til 5. Alle umarkerede tilstødende par må ikke summere til 5 eller 10.
Ekspert XV Sudoku. XV-tvangskæder og udtømmende negativ-begrænsningsanalyse — de sværeste par-sum puslespil på siden.
8
7
9
5
1
9
1
8
5
7
1
7
9
4
6
5
4
9
1
3
4
6
4
8
Fejl
0/3
Point
-
Tid
00:00
Fremskridt0%
Ekspert · XV Sudoku
Sådan spiller du XV Sudoku →
Hvad er XV Sudoku?
Sværhedsgrad
★★★☆☆
3/5
Begrænsningstype
Cellerelationer
Typiske Givne Tal
18–24
Gns. Løsning (Ekspert)
62 min
Løsningsteknikker for Ekspert niveau
| Teknik | Beskrivelse | Niveau |
|---|---|---|
| Negative Constraint | Where no X or V appears between adjacent cells, their sum is neither 10 nor 5. This eliminates (1,9), (2,8), (3,7), (4,6) for X and (1,4), (2,3) for V. | Begynder |
| Sum Pair Enumeration | List all digit pairs that sum to 10 (for X) or 5 (for V), then use row/column placement to identify which pair must occupy each marked pair. | Begynder |
| Marker Chain Logic | Multiple consecutive X and V markers in a row form a sum chain — enumerate valid assignments for the entire chain simultaneously. | Mellemniveau |
| Box X-Interaction | An X pair forces both digits into specific positions within their shared box, constraining all remaining cells of that box. | Avanceret |
Teknikker at mestre på Ekspert
- X-Wing-teknik — Expert XV solving alternates marker chains with fish — push the negative constraint until a digit holds two cells per row, then the X-Wing finishes the line.
- Swordfish technique — Dense marker chains leave mid digits clustered in matching columns; a Swordfish on 5 — the marker-immune digit — cracks many expert XV endgames.
Gennemsnitlig Løsningstid efter Sværhedsgrad
Let
8 min
Mellem
18 min
Svær
35 min
Ekspert
62 min
Vil du have en fuld gennemgang af regler, strategier og løsningstrin?
Sådan spiller du XV Sudoku →
Relaterede varianter
Kropki Sudoku
Swaps sum markers for difference and ratio dots — the same marked-pair-plus-negative-constraint solving rhythm.
Konsekutive Sudoku
A single-marker version of the same idea: every consecutive neighbour pair is flagged, and silence is information.
Større end Sudoku
Adjacent cells related by order instead of sums — chains of inequalities replace chains of X and V markers.
Ofte stillede spørgsmål — Ekspert XV Sudoku
Flere spørgsmål? Se den fulde XV Sudoku-guide.