困难 候选数数独
一个无数字变体——只给出铅笔标记，而不是最终答案。从候选数集而不是已放置的数字解题。
困难 Sukaku。需要锁定候选数和多步消除链——密集的盘面，没有捷径。
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什么是Sukaku？
难度
★★★☆☆
3/5
约束类型
Pencilmark Elimination
典型给定数
All candidates shown
平均解题 (困难)
35 分钟
困难 级别的解题技巧
| 技巧 | 描述 | 级别 |
|---|---|---|
| Candidate Scanning | Start by scanning rows, columns, and boxes — any candidate appearing in only one cell in a group must be placed there. | 初级 |
| 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. | 初级 |
| 显性单数 | 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. | 中级 |
| 隐性单数 | 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. | 中级 |
| 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. | 高级 |
准备好终极测试了吗?试试 专家 Sukaku — 数独 上最难的谜题。
在困难需要掌握的技巧
- Hidden Pairs technique — Hard sukaku starts with deliberately bloated candidate lists — hidden pairs are the tool that cuts through, stripping the excess from exactly two cells per unit.
- X翼技巧 — Because every candidate is visible, X-Wing rectangles can be spotted by pure pattern-reading — scan each digit's printed positions row by row for the two-and-two shape.
按难度划分的平均解题时间
简单
8 分钟
中等
18 分钟
困难
35 分钟
专家
62 分钟
想要规则、策略和解题步骤的完整指南吗？
如何玩Sukaku →
相关变体
杀手数独
Another puzzle that opens with zero placed digits — cage sums replace pencilmarks as your only raw material.
锯齿数独
Sharpens the same candidate-tracking discipline sukaku trains, with region shapes that twist your eliminations.
对角线数独
Adds two more houses to feed your elimination engine — ideal for solvers who enjoy sukaku's systematic pruning.
常见问题 — 困难 铅笔数独
更多问题？请参阅完整 Sukaku 指南.