困難字母數獨
將數字替換為字母A–I。每一行、列和宮都必須恰好包含每個字母一次。免費，無需登入。
困難 字母數獨。較少的給定字母和多步驟刪除鏈使其成為真正的考驗—— 筆記 是必要的。
G
F
G
F
A
I
E
B
C
H
E
B
G
I
B
G
C
I
A
E
C
F
H
G
I
H
E
什麼是 字母/文字數獨？
難度
★★☆☆☆
2/5
約束類型
Letter Substitution
典型給定數
24–32
平均解題時間（困難）
25分鐘
解題技巧：困難 等級
| 技巧 | 描述 | 等級 |
|---|---|---|
| Same Logic, Different Symbols | Every classic Sudoku technique applies — just with letters A–I instead of 1–9. Scanning, naked singles, and box interactions all work identically. | 初學者 |
| Letter-to-Number Mapping | Internally, A=1, B=2, …, I=9. If numbers are more comfortable, mentally map each letter to its digit while solving. | 初學者 |
| Word Spotting | Some Alphabet Sudoku puzzles are designed so a completed row or diagonal spells a recognisable word — identifying the target word can provide placement hints. | 中級 |
準備好終極測試了嗎？試試 專家 字母/文字數獨 — 數獨 上最難的謎題。
在 困難 需要掌握的技巧
- Hidden Pairs technique — Two letters confined to the same two cells of a unit work exactly like digit pairs — but letter notes are easy to misread, so double-check the pair before stripping other candidates.
- X-Wing 技巧 — An X-Wing on the letter E is identical to one on the digit 5 — the rectangle logic is symbol-blind, and hard alphabet grids require it just as often as hard classics.
依難度平均解題時間
簡單
5分鐘
中等
12分鐘
困難
25分鐘
專家
45分鐘
想要規則、策略和解題步驟的完整演練嗎？
如何遊玩 字母/文字數獨 →
相關變體
迷你數獨 (4×4)
The other easy-entry variant — identical logic to classic Sudoku shrunk to a 4×4 grid you can finish in minutes.
奇數 / 偶數數獨
Reintroduces number properties gently: shaded cells tell you the parity of the digit inside.
連續數獨
A first step into relationship clues — bars mark neighbouring cells whose values differ by exactly 1.
常見問題 — 困難 字母數獨
還有問題？請參閱完整 字母數獨指南.