混沌构造数独
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
粗边框分隔不同区域。在解题时推断出9个区域。
你必须确定region boundaries作为求解的一部分
什么是混沌构造？
Chaos Construction Sudoku完全没有预定义的区域。相反，你必须同时推断数字放置和九个9单元格区域的位置，同时满足所有标准Sudoku的行/列规则。这是最开放的Sudoku变体——谜题定义了足够的约束（通常通过线条或其他规则）来唯一确定网格和区域结构。
一览
| 约束类型 | Hidden Irregular Regions |
| 典型给定数 | 24–32 |
| 难度评级 | ★★★★☆ 4/5 |
| 平均解题时间 — 简单 | 12 分钟 |
| 平均解题时间 — 中等 | 26 分钟 |
| 平均解题时间 — 困难 | 50 分钟 |
| 平均解题时间 — 专家 | 80 分钟 |
如何解混沌构造
| 技巧 | 它的作用 | 级别 |
|---|---|---|
| Border Reading | Thick borders separate cells in different regions. Cells without thick borders between them are in the same region. Map connected groups first. | 高级 |
| Region Size Counting | Each region contains exactly 9 cells. Count connected groups to verify region membership and identify boundaries. | 高级 |
| 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. | 高级 |
| 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. | 高级 |
| Construction and Solving Together | Alternate between deducing region structure and placing digits — each informs the other in a co-dependent process. | 高级 |
平均解题时间
简单
12 分钟
中等
26 分钟
困难
50 分钟
专家
80 分钟
常见问题
什么是混沌构造数独？
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.