Rules
Letters are symbols, not words.
Every row, column, and 3×3 box must contain S, U, D, O, K, A, B, C and E exactly once. You do not need to form words, know definitions, or do arithmetic. These puzzles do not hide a secret word.
Sudoku with letters · no arithmetic
Wordoku
Swap numbers for nine distinct letters. Place S, U, D, O, K, A, B, C and E once in every row, column and box. The logic is classic Sudoku; the symbols feel fresh.
- Symbols
- 9 distinct letters
- Rules
- Classic 9×9
- Puzzles
- Freshly generated
Try our main game for daily puzzles, difficulty choices and races with friends.
Use the letter pad or type S U D O K A B C E on your keyboard. Each is a distinct symbol. Delete or Backspace clears a square.
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Start fresh? Your current entries and notes will be cleared.
Progress saves in this browser. New puzzle generates a fresh board; no account needed.
First moves
Find the missing letter.
A row containing S, U, D, O, K, A, B and C is missing E. If several letters are absent, check its columns and 3×3 boxes to reduce the options. Notes hold candidate letters; Hint explains one forced placement and leaves you in control of entering it.
Print or switch
Same logic on paper or with numbers.
Print puzzle creates a letter worksheet and optional answer key. Save it as a PDF from your browser if you prefer. Ready for daily number puzzles, difficulty choices, or friend races? Use Play classic Sudoku to open the main game.
Wordoku: questions before you play
What is Wordoku?
Wordoku is letter Sudoku: a 9×9 logic puzzle that replaces the nine digits with nine distinct letters. Each row, column, and 3×3 box must contain every letter once.
Does Wordoku require spelling words?
Not on this page. The letters are simply nine different symbols. Some other Wordoku formats hide a word, but these puzzles use classic Sudoku logic without a hidden-word rule.
Which letters can I enter?
Use S, U, D, O, K, A, B, C and E. Tap a letter on the pad or type it on your keyboard. Use Notes for candidates, Undo to reverse an entry, and Check for feedback.
Can I print Wordoku with answers?
Yes. Print puzzle outputs the original letter clues. Leave Include answer key checked to add the completed letter grid on its own page, then print or save as PDF.
Does every new puzzle have one solution?
Yes. New puzzle generates fresh clues in your browser and checks that there is exactly one solution before the board opens. Restart repeats your current puzzle, and saved progress resumes it.