クローン数独
3
9
6
4
9
8
5
4
6
3
7
2
1
9
3
7
8
9
1
6
6
9
2
1
5
2
1
9
7
4
8
9
7
1
2
5
6
3
クローンA
クローンB
両方の領域は同一の数字を持つ必要があります
クローン数独の遊び方
標準の数独ルールが適用されます。強調表示された2つの領域（クローンAは琥珀色、クローンBは紫色）は同一の数字配置でなければなりません。対応するセルは同じ数字である必要があります。一方のクローンに数字を配置すると、自動的にもう一方のクローンの同じ位置が制約されます。
完全ガイド →
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
クローン数独とは？
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。
概要
| 制約タイプ | Clone Regions |
| 典型的な初期数字 | 24–32 |
| 難易度評価 | ★★★★☆ 4/5 |
| 平均解答時間 — 簡単 | 10分 |
| 平均解答時間 — ミディアム | 22分 |
| 平均解答時間 — 難しい | 42分 |
| 平均解答時間 — エキスパート | 72分 |
クローン数独 の解き方
| テクニック | それが何をするか | レベル |
|---|---|---|
| Clone Pair Deduction | Any digit placed in one clone region immediately forces the same digit in the corresponding cell of the other clone region. | 上級 |
| Constraint Propagation | A clone placement propagates through standard row, column, and box constraints in both regions simultaneously. | 上級 |
| Clone-Box Interaction | If both clone regions share boxes with heavily constrained cells, the clone constraint rapidly resolves entire boxes. | 上級 |
| Mirror Elimination | When a digit is eliminated from a position in one clone region by standard logic, it can be eliminated from the same position in the other clone region. | 上級 |
| Multi-Clone Logic | With two clone regions, solving either provides equal information about both. Alternate deduction paths between clones for maximum efficiency. | 上級 |
平均解答時間
簡単
10分
ミディアム
22分
難しい
42分
エキスパート
72分
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.