困難 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。
困難 XV數獨。密集的XV網絡要求在整個棋盤上鏈接正負對約束，然後才能確定個別數字。
5
8
6
2
1
7
9
2
3
5
6
5
7
2
4
6
4
9
3
1
5
6
7
9
2
6
4
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（困難）
35 分鐘
解謎技巧（困難 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 |
準備好終極測試了嗎？試試 專家 XV數獨 — 數獨 上最難的謎題。
在 困難 需要掌握的技巧
- Hidden Pairs technique — Negative-constraint eliminations are easy to under-apply; when you work them fully, two digits often share only two cells of a box — hard XV pairs hide behind the absent markers.
- X翼技巧 — Unmarked edges thin the 1s and 9s drastically (each has only one sum partner per rule), so hard XV grids develop X-Wing geometry on the extremes early.
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 — 困難 XV數獨
更多問題？請參閱完整 XV數獨指南.