Generate a PDF.
Difficulty is graded by the technique each puzzle requires, and every grid is checked for a single solution before it prints — so a hundred-puzzle batch is a hundred valid, fairly-rated puzzles.
Every puzzle is checked for a single unique solution before it prints. Difficulty is graded by the hardest human technique the puzzle actually requires — not by clue count. No signup, no email, no watermark.
Why this generator.
- Single-solution guaranteed — multi-solution grids are thrown away, not shipped.
- Honest difficulty — easy, medium, hard, and expert mean a specific solving technique, not a clue count.
- Answer key on demand — solutions print after the puzzles, id-matched.
- Large-print mode — bigger digits, one or two per page, for classrooms and low-vision solvers.
- Every grid stamped with a reproducible id — keep the PDF and reprint forever.
Generator FAQ.
How many puzzles can I make at once?
Up to six per page across twenty pages — a hundred-plus puzzles in a single PDF. Click Generate again any time for an entirely fresh set; nothing repeats.
Are two generated puzzles ever the same?
Each click seeds from the clock, so in practice you never see a repeat. If you want a specific puzzle back, keep its PDF — every grid is stamped with its own id.
Why is generating Expert slower than Easy?
The generator proves each puzzle's difficulty by actually solving it with human techniques and confirming a single solution. Expert grids take more search to validate, so a big expert batch takes a few seconds — still entirely in your browser.
Can I use these commercially — newsletters, classrooms, care homes?
Yes. They are free to print and hand out. No signup, no watermark, no attribution required.