混沌建構數獨
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
粗邊框分隔不同的區域。在解題時推斷出 9 個區域。
你必須在解題過程中確定區域邊界
什麼是 混沌建構？
Chaos Construction Sudoku 完全沒有預先定義的區域。相反，你必須同時推導出數字填入以及九個9單元格區域的位置，同時滿足所有標準數獨的行列規則。這是最開放的數獨變體——謎題定義了足夠的約束（通常通過線或其他規則）來唯一確定網格和區域結構。
一覽
| 約束類型 | Hidden Irregular Regions |
| 典型給定數 | 24–32 |
| 難度評分 | ★★★★☆ 4/5 |
| 平均解題時間 — 簡單 | 12分鐘 |
| 平均解題時間 — 中等 | 26分鐘 |
| 平均解題時間 — 困難 | 50分鐘 |
| 平均解題時間 — 專家 | 80分鐘 |
如何解 混沌建構
| 技巧 | 它的作用 | 等級 |
|---|---|---|
| Border Reading | Thick borders separate cells in different regions. Cells without thick borders between them are in the same region. Map connected groups first. | 進階 |
| Region Size Counting | Each region contains exactly 9 cells. Count connected groups to verify region membership and identify boundaries. | 進階 |
| 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. | 進階 |
| 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. | 進階 |
| Construction and Solving Together | Alternate between deducing region structure and placing digits — each informs the other in a co-dependent process. | 進階 |
平均解題時間
簡單
12分鐘
中等
26分鐘
困難
50分鐘
專家
80分鐘
常見問題
什麼是 Chaos Construction Sudoku？
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.