Easy Alphabet Sudoku

Replace digits with letters A–I. Every row, column, and box must contain each letter exactly once. Free, no login required.

Easy Medium Hard Expert

New to Alphabet Sudoku? Same rules as classic Sudoku, but with letters A–I instead of digits. A great warm-up for any skill level.

F
F
H
A
B
G
C
E
H
A
B
H
I
F
G
G
D
F
A
C
G
B
D
I
E
B
C
H
B
H
A
F
D
E
G
F
H
C
Mistakes
0/3
Score
-
Time
00:00
Try Medium Alphabet Sudoku →
Progress0%

What is Alphabet / Word Sudoku?

Difficulty
★★☆☆☆
2/5
Constraint Type
Letter Substitution
Typical Givens
24–32
Avg. Solve (Easy)
5 min

Solving Techniques for Easy Level

Technique Description Level
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. Beginner
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. Beginner

Ready to go deeper? Try Medium Alphabet / Word Sudoku to unlock Intermediate techniques.

Techniques to Master at Easy

  • Last Free Cell technique — Spotting the missing letter is harder than spotting a missing digit — recite A through I as you scan each unit, ticking letters off, and the last gap names itself.
  • Last Remaining Cell technique — Pick one letter and sweep the grid for it before switching — letter glyphs don't pattern-match as fast as digits, so single-letter sweeps beat mixed scanning.

Average Solve Time by Difficulty

Easy
5 min
Medium
12 min
Hard
25 min
Expert
45 min
Want a full walkthrough of rules, strategies, and solving steps? How to Play Alphabet / Word Sudoku →

Related Variants

Mini Sudoku (4×4)

The other easy-entry variant — identical logic to classic Sudoku shrunk to a 4×4 grid you can finish in minutes.

Odd / Even Sudoku

Reintroduces number properties gently: shaded cells tell you the parity of the digit inside.

Consecutive Sudoku

A first step into relationship clues — bars mark neighbouring cells whose values differ by exactly 1.

Frequently Asked Questions — Easy Alphabet Sudoku

What is Alphabet Sudoku?
Alphabet Sudoku replaces the digits 1–9 with the letters A through I. Every row, column, and 3×3 box must contain each of the nine letters exactly once. The logic is identical to classic Sudoku — only the symbols change.
How do I start an easy Alphabet Sudoku?
Look for rows, columns, or boxes that already have six or more letters filled in. The remaining cells have very few possibilities. Use the process of elimination — if a row already contains A, B, C, D, E, F, and G, the missing cells must hold H and I.
Is Alphabet Sudoku harder than regular Sudoku?
Alphabet Sudoku is the same difficulty as regular Sudoku at each level. Some players find letters slightly harder to scan visually than digits because digits have stronger familiar patterns, but the underlying logic is exactly the same.
What letters are used in Alphabet Sudoku?
Alphabet Sudoku uses the first nine letters of the alphabet: A, B, C, D, E, F, G, H, and I. Each letter must appear exactly once in every row, column, and 3×3 box.
Do I need any special strategy for easy Alphabet Sudoku?
No special strategy is needed at easy difficulty. Scan each row, column, and box for missing letters and use simple elimination. Single candidates — cells where only one letter fits — will be common and enough to solve the puzzle.

More questions? See the full Alphabet Sudoku guide.