Chaos Construction数独
6
2
9
4
7
3
3
9
8
1
2
4
2
6
5
9
9
3
2
7
4
1
9
7
7
7
5
3
3
1
8
2
4
2
9
8
3
5
太い枠線が異なる領域を区切ります。解きながら9つの領域を推測してください。
カオスコンストラクションの遊び方
標準の行と列のルールが適用されます。9つの不規則な領域（太い枠線で区切られています）にもそれぞれ1～9が含まれなければなりません。ジグソー数独とは異なり、領域を区別する色はありません。枠線と数字の制約から各領域を形成するセルを推測する必要があります。
完全ガイド →
解決の一部としてregion boundariesを決定する必要があります
Chaos Construction 簡単
Chaos Construction ミディアム
Chaos Construction 難しい
Chaos Construction エキスパート
Chaos Constructionとは？
カオスコンストラクション数独は、事前に定義された領域がまったくありません。代わりに、数字の配置と9つの9セル領域の位置の両方を推測しなければならず、標準の数独の行/列ルールをすべて満たす必要があります。これは最も自由度の高い数独バリアントであり、パズルは（多くの場合、ラインやその他のルールを通じて）グリッドと領域構造の両方を一意に決定するのに十分な制約を定義しています。
概要
| 制約タイプ | Hidden Irregular 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 | 12分 |
| 平均解答時間 — ミディアム | 26分 |
| 平均解答時間 — 難しい | 50分 |
| 平均解答時間 — エキスパート | 80分 |
Chaos Construction の解き方
| テクニック | それが何をするか | レベル |
|---|---|---|
| Border Reading | Thick borders separate cells in different regions. Cells without thick borders between them are in the same region. Map connected groups first. | 上級 |
| Region Size Counting | Each region contains exactly 9 cells. Count connected groups to verify region membership and identify boundaries. | 上級 |
| Deducing Regions from Digits | If standard row/column logic places a digit, use that placement to confirm or deny region membership — a region can only contain each digit once. | 上級 |
| Region Pointer Pairs | If a digit in a deduced region is confined to one row or column, eliminate it from that entire row or column. | 上級 |
| Construction and Solving Together | Alternate between deducing region structure and placing digits — each informs the other in a co-dependent process. | 上級 |
平均解答時間
簡単
12分
ミディアム
26分
難しい
50分
エキスパート
80分
よくある質問
Chaos Construction Sudokuとは何ですか？
Chaos Construction Sudoku (also called Uncoloured Irregular Sudoku) is a variant where the nine irregular regions are not shown at the start. Instead, only thick border segments are given — you must deduce the boundaries of the nine regions as part of solving the puzzle. Once you determine a region, it must contain 1–9 exactly once.
How do I find the hidden regions?
Thick line segments between cells mark regional boundaries. By following these boundaries and counting cells, you can begin to infer where each region begins and ends. A complete region always contains exactly nine cells. Cross-referencing digit placement constraints with possible region shapes is the core meta-solving step.
Do Sudoku rules still apply?
Yes. Every row, column, and the nine hidden irregular regions must each contain 1–9 exactly once. The regions are standard in size (9 cells each) and follow all the same rules as Irregular Sudoku — the only difference is that you must deduce the region boundaries as you go.
Is Chaos Construction Sudoku very hard?
It is among the most challenging Sudoku variants. The region deduction layer adds significant complexity on top of standard Sudoku logic. Expert Chaos Construction puzzles are considered some of the hardest logic puzzles available. Even easy difficulty requires more concentration than most other variants.
Where do I start in Chaos Construction Sudoku?
Begin at corners and edges — border segments there are most constrained. Count cells along each segment to identify which regions are smallest and most bounded. Once you confirm a single full region, the digit constraints it introduces often help you trace the adjacent region boundaries.
How long does Chaos Construction Sudoku take to solve?
Easy puzzles take 20–40 minutes. Medium puzzles run 40–75 minutes. Hard and expert puzzles can take well over 2 hours. The region deduction phase alone often takes longer than solving a complete standard Sudoku.