Hvordan spille Clone Sudoku
Markeringsregioner må inneholde identiske sifferarrangementer
Reglene
Standard Sudoku-regler gjelder: fyll hver rad, kolonne og 3×3-boks med sifrene 1–9, hver forekommer nøyaktig én gang.
Clone Sudoku markerer par av regioner (kloner) på rutenettet. Hvert par av klonregioner må inneholde nøyaktig samme arrangement av sifre — hvis en klon har en 3 i sin øverste venstre celle, må den andre klonen også ha en 3 i sin tilsvarende celle. Klonbegrensninger skaper kraftige symmetribaserte deduksjoner som kan løse hele regioner på en gang.
For hvor denne oppgaven kom fra, hvordan den sammenlignes med relaterte varianter og en strategioppsummering, se vår Clone Sudoku variantoversikt.
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Hvordan løse Clone Sudoku
Vanlige spørsmål
Hva er Clone Sudoku? ▾
Clone Sudoku is a variant where two highlighted regions of the same shape appear on the grid. The two regions are 'clones' — they must contain exactly the same digit arrangement. Every cell in one region holds the same digit as the corresponding cell in the other region. Standard Sudoku rules apply.
How do the clone regions correspond? ▾
The two clone regions are the same shape and size. Each cell in one region is paired with the corresponding positionally-equivalent cell in the other region. Placing a digit in any cell of one clone immediately fixes that digit in the matching cell of the other clone.
Can clone regions overlap with the same rows or columns? ▾
Yes. The puzzle constructor ensures that the clone constraint is always consistent with Sudoku rules — the two regions are positioned so that corresponding cells are in different rows, columns, and boxes, allowing the same digit to appear in both without violating uniqueness.
Is Clone Sudoku harder than regular Sudoku? ▾
The clone constraint effectively halves the number of independent cells to solve — every deduction in one region automatically applies to the other. Easy Clone puzzles resolve noticeably faster than classic Sudoku. Hard and expert puzzles use the clones to create complex bi-directional constraint chains.
What is the best strategy for Clone Sudoku? ▾
Treat the two clone regions as a single constraint. Whenever you eliminate a candidate from a cell in one region, immediately eliminate it from the corresponding cell in the other. Focus on the rows, columns, and boxes that interact with both regions simultaneously.
How long does Clone Sudoku take to solve? ▾
Easy puzzles take 6–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–60 minutes and expert puzzles can take 60–90 minutes. The bilateral nature of the clone constraint makes mid-game breakthroughs especially satisfying.