Sukaku
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如何玩Sukaku數獨
每個儲存格以一組候選數字顯示為鉛筆標記開始。按一個數字從所選儲存格中消除該候選數。當僅剩一個候選數時，數字自動放置。顯示單個大數字的儲存格是固定的，無法修改。標準數獨行、列和宮規則適用。
完整指南 →
A pencilmark-style variant where clues are given as candidate sets
什麼是 Sukaku？
Sukaku (数角) 是一種 Sudoku 變體，其中每個格子不是給定數字，而是給定一組可能的 candidates。解題者必須使用 standard Sudoku logic 消除 candidates，直到每個格子只剩下一個 candidate。有些 Sukaku puzzles 提供非常稀疏的 candidate sets（近乎完整的 givens），而其他則提供完整或近乎完整的 candidate lists，需要 advanced techniques 來解決。
一覽
| 約束類型 | Pencilmark Elimination |
| 典型給定數 | All candidates shown |
| 難度評分 | ★★★☆☆ 3/5 |
| 平均解題時間 — 簡單 | 8分鐘 |
| 平均解題時間 — 中等 | 18分鐘 |
| 平均解題時間 — 困難 | 35分鐘 |
| 平均解題時間 — 專家 | 62分鐘 |
如何解 Sukaku
| 技巧 | 它的作用 | 等級 |
|---|---|---|
| Candidate Scanning | Start by scanning rows, columns, and boxes — any candidate appearing in only one cell in a group must be placed there. | 進階 |
| Cross-Hatch Elimination | When a digit is placed (or reduced to one candidate), eliminate it from all cells in the same row, column, and box. | 進階 |
| 裸單 | A cell with only one remaining candidate is a naked single — the digit is forced. In Sukaku, this happens automatically when you eliminate down to one candidate. | 進階 |
| 隱藏單一 | A candidate that appears exactly once in a row, column, or box must be placed in that cell regardless of how many other candidates that cell shows. | 進階 |
| Pair Elimination | Two cells in a group that share only the same two candidates form a naked pair — both candidates can be eliminated from all other cells in that group. | 進階 |
平均解題時間
簡單
8分鐘
中等
18分鐘
困難
35分鐘
專家
62分鐘
常見問題
What is Sukaku?
Sukaku is a Sudoku variant where every cell in the 9×9 grid starts pre-filled with a set of pencilmark candidates instead of given digits. Your task is to eliminate incorrect candidates using standard Sudoku rules until exactly one digit remains in each cell. All 81 cells begin with multiple possibilities.
Sukaku與regular Sudoku有何不同？
In classic Sudoku, some cells are pre-filled with confirmed digits. In Sukaku, no cell has a confirmed digit — instead, each cell shows a subset of possible digits as pencilmarks. The starting pencilmarks are curated by the puzzle constructor and are always consistent with the unique solution.
Are the starting pencilmarks always correct?
Yes. The pencilmarks shown at the start of a Sukaku puzzle represent a valid subset of candidates for each cell — they are never wrong, but they may include more candidates than strictly necessary. Your job is to eliminate all but the correct digit using logical deductions.
What techniques work best in Sukaku?
All standard Sudoku elimination techniques apply: naked singles (when only one candidate remains in a cell), hidden singles (when a digit can only go in one cell within a row, column, or box), naked pairs, pointing pairs, and advanced techniques like X-Wings and Swordfish. The absence of given digits means you rely entirely on elimination.
Is Sukaku harder than regular Sudoku?
Easy Sukaku is more forgiving than classic Sudoku because the pencilmarks are already provided — you never have to work out candidates from scratch. Hard and expert Sukaku puzzles with minimal starting candidates require the same advanced techniques as difficult classic Sudoku.
How long does Sukaku take to solve?
Easy puzzles take 5–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–60 minutes and expert puzzles can take over 90 minutes. Solve time scales with how many eliminations each technique step provides.