Ekspert Killer Sudoku
Bur summer møder klassisk Sudoku logik. Cifre i hvert bur skal totalt svare til ledetråden — ingen gentagelser tilladt. Gratis, ingen login påkrævet.
Ekspert Killer Sudoku. Nul givne cifre, sjældne burkombinationer og interaktioner, der spænder over hele gitteret. Hver placering følger fra præcis logik. Ingen gætning.
Sådan spiller du Killer Sudoku
Killer Sudoku - Komplet guide
Tvungne burkombinationer du skal huske
Vigtige løsningsteknikker
Hver række, kolonne og 3x3 boks summer til 45. Hvis alle bure i en række er kendt bortset fra én celle, er den manglende værdi = 45 - (summen af alle andre bur-totaler i den række). Dette er den enkelt mest kraftfulde Killer-teknik.
Ofte stillede spørgsmål
Hvad er Killer Sudoku?
Løsningsteknikker for Ekspert niveau
| Teknik | Beskrivelse | Niveau |
|---|---|---|
| Cage Sum Elimination | Each cage has a fixed sum. Use the sum and the number of cells to calculate which digits are possible — e.g. a 2-cell cage summing to 3 can only be {1,2}. | Begynder |
| No-Repeat Rule | Digits cannot repeat within a cage. Combined with sum constraints, this eliminates many candidates immediately. | Begynder |
| 45-regel | Each row, column, and box sums to 45. Subtract known cage totals within a unit to find leftover cell sums — often isolating a single value. | Mellemniveau |
| Innies og Outies | An innie is a cage cell inside a unit whose sum reveals a digit; an outie is outside. These provide single-cell deductions without full candidate tracking. | Mellemniveau |
| Bur Overlap Tælling | When a cage spans two boxes or rows, use subset counting to pin down which digits appear in the overlap cells. | Avanceret |
| Naked Subset in Cages | If a group of cages within a unit accounts for exactly n cells using n digits, those digits are locked to those cells and removed from all other unit cells. | Avanceret |
Teknikker at mestre på Ekspert
- X-Wing-teknik — Expert killers withhold single-combination cages, so opening progress is slow — alternate 45-rule sweeps with X-Wing scans, as each elimination re-prices every cage it touches.
- Swordfish technique — Once cage logic confines a digit to matching columns across three rows, the Swordfish elimination feeds straight back into the cage sums — the expert killer's closing argument.
Gennemsnitlig Løsningstid efter Sværhedsgrad
Relaterede varianter
Keeps the sum-clue arithmetic but moves it onto diagonals where digits may repeat — a deliberate twist on your cage instincts.
Another sum-driven puzzle: instead of cage totals you deduce which digits sit between the 1 and the 9 in each row and column.
Swaps cages for arrows whose shaft must add up to the circled digit — the same combination-counting muscle in a linear shape.
Ofte stillede spørgsmål — Ekspert Killer Sudoku
Flere spørgsmål? Se den fulde Killer Sudoku FAQ.