Samurai數獨
分數
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錯誤
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時間
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簡單 · 武士 · 5個子網格0%
五個 overlapping 9×9 grids 共享 corner boxes
什麼是 Samurai數獨？
武士數獨由五個相互鎖定的9×9網格組成，排列成X形——一個中央網格和四個角落網格，全部共享一個重疊的3×3宮。每個子網格必須獨立滿足標準數獨規則。解開一個子網格常能提供解鎖另一個的線索。完整謎題涵蓋一個21×21的網格。
一覽
| 約束類型 | 5 Overlapping Grids |
| 典型給定數字 | ~30 per sub-grid |
| 難度評級 | ★★★★★ 5/5 |
| 平均解題時間 — 簡單 | 45 分鐘 |
| 平均解題時間 — 中等 | 90 分鐘 |
| 平均解題時間 — 困難 | 150 分鐘 |
| 平均解題時間 — 專家 | 240 分鐘 |
如何解 Samurai數獨
| 技巧 | 它的作用 | 等級 |
|---|---|---|
| Sub-Grid Independence | Each of the five 9×9 sub-grids satisfies standard Sudoku rules independently. Solve each one using all standard techniques. | 進階 |
| Overlap Box Exploitation | The four corner boxes where sub-grids meet are shared between two grids. Any digit placed in a shared box eliminates that digit from two sub-grids at once. | 進階 |
| Cross-Grid Cascade | Completing a corner box in the central grid forces values in the corresponding corner grid's box, which may cascade further through that grid. | 進階 |
| Shared Box Forcing | When a shared box is nearly complete, use both sub-grids' row and column constraints to force the remaining digits. | 進階 |
| Global Number Counting | Across all five sub-grids, each digit 1–9 appears 5×9=45 times total. This global count can confirm placement decisions near the end. | 進階 |
平均解題時間
簡單
45 分鐘
中等
90 分鐘
困難
150 分鐘
專家
240 分鐘
常見問題
乜嘢係Samurai Sudoku？
Samurai Sudoku is a variant consisting of five overlapping 9×9 Sudoku grids arranged on a 21×21 board. One grid occupies the centre, and four grids are placed at the corners with their inner 3×3 boxes overlapping the centre grid's corner boxes. All five grids must be solved simultaneously.
How do the overlapping boxes work?
Each of the four outer grids shares one 3×3 box with the centre grid. Any digit placed in a shared box satisfies the constraint for both grids simultaneously. This means information flows between grids through the shared boxes — solving one grid's corner often directly advances the centre grid.
Do all five grids have standard Sudoku rules?
Yes. Each of the five 9×9 grids individually follows all standard Sudoku rules: every row, column, and 3×3 box within that grid must contain 1–9 exactly once. The only interaction between grids is through the shared corner boxes.
Is Samurai Sudoku harder than regular Sudoku?
Samurai puzzles take significantly longer than single-grid Sudoku simply due to scale — you're solving five grids. Individual difficulty can range from easy to expert. The cross-grid interactions through shared boxes add a satisfying extra layer that single-grid Sudoku doesn't offer.
What is the best approach to Samurai Sudoku?
Work on all five grids simultaneously rather than trying to complete one before moving to another. When you get stuck on one grid, the shared boxes often provide a breakthrough from a neighbouring grid. Scan all five grids for hidden singles after every placement in any shared box.
How long does Samurai Sudoku take to solve?
Easy puzzles take 25–45 minutes. Medium puzzles run 45–90 minutes. Hard and expert puzzles can take 2–4 hours. The time is primarily driven by scale — five full grids — rather than by individual deduction difficulty.