Daily Sudoku Puzzle
One puzzle a day, the same for everyone worldwide, drawn from our solver-verified library. Difficulty ramps through the week — Easy Monday, Medium midweek, Hard Thursday and Friday, and Expert on the weekend — so a week of dailies is a complete training arc.
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Daily Sudoku FAQ
- How does the daily Sudoku puzzle work?
- Every day at midnight UTC a new puzzle is selected from our solver-verified library. Difficulty ramps through the week: Easy on Monday, Medium midweek, Hard on Thursday and Friday, and Expert on the weekend. Everyone in the world gets the same puzzle each day.
- Is the daily Sudoku free?
- Yes. The daily puzzle, like every puzzle on Precision Sudoku, is free to play in the browser with no signup. Pencil marks, hints, and a timer are built in.
- What difficulty is the daily Sudoku today?
- Difficulty follows the weekly ramp: Monday is Easy (singles only), Tuesday and Wednesday are Medium (pairs and triplets), Thursday and Friday are Hard (deep subsets), and Saturday and Sunday are Expert (X-Wing or Swordfish). The exact techniques today’s puzzle needs are listed on this page.
The weekly ramp, day by day
The difficulty curve is borrowed from crossword convention, where the week builds from a gentle Monday to a demanding weekend. It is not decoration here: because every puzzle is graded by the hardest technique it actually requires, each day corresponds to a specific set of skills rather than a vague level.
| Day | Level | What it asks of you |
|---|---|---|
| Monday | Easy | Naked and Hidden Singles only. Solvable by cross-hatching alone, with no pencil marks needed. |
| Tuesday & Wednesday | Medium | Singles will stall. Expect locked candidates (Omission) or a Naked Pair to reopen the grid. |
| Thursday & Friday | Hard | Deeper subsets — Hidden Pairs and triplets. Candidate marks become genuinely useful here. |
| Saturday & Sunday | Expert | A fish pattern is required: an X-Wing or a Swordfish, on top of everything below it. |
A full week is therefore a complete training arc in miniature, moving from pure scanning on Monday to grid-wide single-digit analysis by Saturday. Solvers who play only the daily still get systematic exposure to the whole ladder, which is more than most puzzle sources offer.
Getting the most out of one puzzle a day
A single daily puzzle is a small amount of practice, so it is worth spending it deliberately rather than just finishing:
- Note where you stall, and for how long. One puzzle a day will not build much recognition on its own, but it is an excellent diagnostic. Three long stalls in a Thursday puzzle tells you precisely which rung of the ladder to work on.
- Never guess to finish. Completing a puzzle by picking between two candidates teaches nothing and hides the gap you would otherwise have found.
- Look up the move you missed. When you are properly stuck, find out what was available rather than pushing through. The technique it names is your next practice target.
- Then drill it properly. The daily is the test, not the training. Actual improvement comes from repetition on the technique practice pages, where every puzzle is verified to contain the pattern you are working on.
If weekend puzzles are consistently out of reach, that is useful information rather than a verdict — it means one specific pattern is missing, and it is usually lower on the ladder than expected. The guide on getting faster describes how to find and close that gap.
Why everyone gets the same puzzle
The daily selection is derived arithmetically from the number of days elapsed since 1 January 1970, in UTC. There is no server involved and no randomness: the same date always maps to the same puzzle, so a solver in Auckland and a solver in Los Angeles are working the identical grid and can compare notes honestly. The changeover is at midnight UTC rather than local midnight, which is what keeps that guarantee true.
Want more than one a day? Play by difficulty, drill a specific technique, or take on the hardest puzzles in the library.