クローン数独 の遊び方
マークされたリージョンは同一の数字配置を含まなければなりません
ルール
標準の数独ルールが適用されます： すべての行、列、3×3ボックスに数字1～9を、それぞれが1回ずつ現れるように埋めます。
クローン数独は、グリッド上に領域のペア（クローン）をマークします。クローン領域の各ペアは、まったく同じ数字の配置を含まなければなりません。一方のクローンの左上のセルに3がある場合、もう一方のクローンの対応するセルにも3がなければなりません。クローン制約は、強力な対称性に基づく推論を生み出し、領域全体を一度に解決できます。
このパズルの出典、関連バリアントとの比較、戦略の概要については、私たちの クローン数独バリアント概要.
概要
クローン数独 の解き方
よくある質問
Clone Sudokuとは何ですか？ ▾
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.