如何遊玩 複製數獨
標記區域必須包含相同的數字排列
規則
適用標準數獨規則： 填滿每一行、列和3×3宮，數字1–9各出現一次。
Clone Sudoku 在網格上標記區域對（clones）。每對 clone 區域必須包含完全相同的數字排列——如果一個 clone 在其左上角單元格有3，則另一個 clone 必須在其對應的單元格也有3。Clone 約束創造了強大的基於對稱的推導，可以一次解決整個區域。
如需了解此謎題的來源、與相關變體的比較及策略摘要，請參閱我們的 複製數獨變體概述.
一覽
如何解 複製數獨
常見問題
什麼是 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.