# Daily Sudoku

> Free online Sudoku puzzles, updated daily. Five difficulty levels, full historical archive, printable PDFs, and guides covering rules, advanced techniques, and Sudoku variants. No accounts or signups required.

The site publishes a fresh, deterministic puzzle every day at midnight UTC across five difficulties (very-easy, easy, medium, hard, very-hard). Every puzzle is guaranteed to have exactly one solution. Player progress is stored only in the browser via localStorage — no server-side accounts.

## Play

- [Today's puzzle](https://daily-sudoku.com/): Today's medium-difficulty daily Sudoku
- [Very Easy](https://daily-sudoku.com/play/very-easy): Beginner-friendly daily puzzle
- [Easy](https://daily-sudoku.com/play/easy): Daily easy puzzle
- [Medium](https://daily-sudoku.com/play/medium): Daily medium puzzle (same as homepage)
- [Hard](https://daily-sudoku.com/play/hard): Daily hard puzzle
- [Very Hard](https://daily-sudoku.com/play/very-hard): Expert-level daily puzzle
- [Archive](https://daily-sudoku.com/archive): Browse every puzzle ever published, grouped by month

## Learn

- [Rules & how to play](https://daily-sudoku.com/gamerules): Official rules and beginner strategy
- [Solving techniques](https://daily-sudoku.com/techniques): Index of advanced solving patterns
- [Naked Pairs](https://daily-sudoku.com/techniques/naked-pairs): Eliminate candidates using two cells sharing the same pair
- [Hidden Pairs](https://daily-sudoku.com/techniques/hidden-pairs): Find pairs hidden among other candidates
- [X-Wing](https://daily-sudoku.com/techniques/x-wing): Eliminate using a rectangular row/column pattern
- [Swordfish](https://daily-sudoku.com/techniques/swordfish): Three-row extension of the X-Wing
- [History of Sudoku](https://daily-sudoku.com/history): From Euler's Latin Squares to the modern game
- [FAQ](https://daily-sudoku.com/faq): Common questions about the site and puzzles

## Variants

- [Sudoku variants](https://daily-sudoku.com/variants): Index of supported variants
- [Killer Sudoku](https://daily-sudoku.com/variants/killer-sudoku): Classic Sudoku with arithmetic cages
- [Mini Sudoku](https://daily-sudoku.com/variants/mini-sudoku): 6x6 grid for beginners and quick games
- [Samurai Sudoku](https://daily-sudoku.com/variants/samurai-sudoku): Five overlapping 9x9 grids

## For families

- [Sudoku for Kids](https://daily-sudoku.com/sudoku-for-kids): Why Sudoku is great for children and how to introduce it

## Optional

- [Print syndication](https://daily-sudoku.com/syndication): Licensing puzzles for newspapers and magazines
- [Contact](https://daily-sudoku.com/contact): Support and business inquiries