A worked example
Choose 44 clues and seed 2026, then regenerate: the same seed and clue target produce the same puzzle.
Sudoku maker
Generate a 9 × 9 sudoku with a verified unique solution, a reproducible seed and a separate answer sheet.
YOUR LITTLE WORKBENCH
Sudoku maker
Make a repeatable worksheet, then download the puzzle and its answer key together. PDF page headings use English; browser printing keeps the interface language.
Verified unique · 44 clues
Your worksheet
SEED / 2026 · 44 cluesTHE METHOD / 01
Know what goesinto your result.
A shuffled valid solution is reduced one clue at a time; a bounded solver keeps a removal only if exactly one solution remains.
Keep the assumptions clear
Clue count is not a rating of human difficulty. The actual clue count is reported if the requested target cannot be reached while keeping uniqueness.
A FEW USEFUL ANSWERS
Good to know.
Are my inputs uploaded?
No. Calculations run locally in your browser. The host still receives normal requests for website pages and assets.
Can I keep my result?
Use the download controls for the current tool or print from your browser. Typing scores and camping plans can also be saved locally; see the privacy page for details.
Do I need an account?
No sign-up, paid API or subscription is required. Both language versions use the same calculation logic.
PUZZLEKIND / TOOLKIT
A little help for every step.
02
Maze maker
Build a rectangular maze with one connected passage network and a highlighted solution from corner to corner.
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Word search
Place your own English words in eight directions, fill the remaining cells and download the answer key.
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Math worksheet
Generate addition, subtraction, multiplication or exact-division exercises with a separate answer page.
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