專家 XV 數獨
X標記和為10的儲存格；V標記和為5的儲存格。所有未標記的相鄰對不得和為5或10。
專家 XV數獨。XV強迫鏈和詳盡的負約束分析——網站上最難的對和謎題。
8
7
9
5
1
9
1
8
5
7
1
7
9
4
6
5
4
9
1
3
4
6
4
8
什麼是 XV數獨？
難度
★★★☆☆
3/5
約束類型
單元格關係
典型給定數字
18–24
平均解題（專家）
62 分鐘
解謎技巧（專家 等級）
| 技巧 | 描述 | 等級 |
|---|---|---|
| Negative Constraint | Where no X or V appears between adjacent cells, their sum is neither 10 nor 5. This eliminates (1,9), (2,8), (3,7), (4,6) for X and (1,4), (2,3) for V. | 初學者 |
| Sum Pair Enumeration | List all digit pairs that sum to 10 (for X) or 5 (for V), then use row/column placement to identify which pair must occupy each marked pair. | 初學者 |
| Marker Chain Logic | Multiple consecutive X and V markers in a row form a sum chain — enumerate valid assignments for the entire chain simultaneously. | 中級 |
| Box X-Interaction | An X pair forces both digits into specific positions within their shared box, constraining all remaining cells of that box. | 進階 |
在 專家 需要掌握的技巧
- X翼技巧 — Expert XV solving alternates marker chains with fish — push the negative constraint until a digit holds two cells per row, then the X-Wing finishes the line.
- Swordfish technique — Dense marker chains leave mid digits clustered in matching columns; a Swordfish on 5 — the marker-immune digit — cracks many expert XV endgames.
按難度劃分的平均解題時間
簡單
8 分鐘
中等
18 分鐘
困難
35 分鐘
專家
62 分鐘
想要規則、策略和解題步驟的完整解說？
如何遊玩 XV數獨 →
相關變體
Kropki數獨
Swaps sum markers for difference and ratio dots — the same marked-pair-plus-negative-constraint solving rhythm.
連續數獨
A single-marker version of the same idea: every consecutive neighbour pair is flagged, and silence is information.
大於數獨
Adjacent cells related by order instead of sums — chains of inequalities replace chains of X and V markers.
常見問題 — 專家 XV數獨
更多問題？請參閱完整 XV數獨指南.