簡單 三文治數獨
網格外部的線索給出每行和每列中夾在1和9之間的數字之和。
新接觸 Sandwich數獨？每個外部數字是該行或列中1和9之間數字的和。從和為零的線索開始。
0
27
25
0
0
0
17
9
8
22
12
9
0
8
9
16
6
11
5
8
1
2
6
4
3
7
9
5
1
3
6
9
9
6
9
4
8
7
5
9
7
6
2
5
9
7
2
6
5
1
9
8
3
4
5
7
什麼是 Sandwich數獨？
難度
★★★★☆
4/5
約束類型
外部線索
典型給定數字
4–10 clue values
平均解題（簡單）
12 分鐘
解謎技巧（簡單 等級）
| 技巧 | 描述 | 等級 |
|---|
準備好更深入了嗎？試試 中等 Sandwich數獨 以解鎖中級技巧。
在 簡單 需要掌握的技巧
- 數獨中的筆記 — Before placing anything, note where 1 and 9 can legally sit in each row and column given its clue — sandwich solving is crust bookkeeping, and notes are the ledger.
- Last Possible Number technique — A clue of 0 glues 1 and 9 together and a clue of 35 pins them to the ends — either way, whole rows of candidates vanish and several cells drop to one digit.
- Last Remaining Cell technique — Once a row's 1 is placed, the column clues immediately restrict where that column's 9 can sit — chase each crust digit to its last legal cell.
按難度劃分的平均解題時間
簡單
12 分鐘
中等
26 分鐘
困難
52 分鐘
專家
85 分鐘
想要規則、策略和解題步驟的完整解說？
如何遊玩 Sandwich數獨 →
相關變體
殺手數獨
Both are sum-deduction puzzles at heart — killer's 45 rule and sandwich's crust sums exercise the same arithmetic.
Skyscraper數獨
Outside clues again, but read as building visibility instead of sums — the same edge-of-grid deduction style.
外部數獨
The gentlest outside-clue cousin: border digits simply belong in the nearest three cells, no arithmetic required.
常見問題 — 簡單 三明治數獨
更多問題？請參閱完整 Sandwich數獨指南.