Medium Sudoku Medium puzzles, free
Medium sudoku, solved while writing notes (candidates), for those used to the basics. Free in your browser with no sign-up.
Who it's for Anyone who can solve Easy and wants to think a little more, or wants to learn how to use notes (candidates).
- Typical time15 to 30 min
- CluesAverage of 30
- Printable puzzles500 puzzles
- Cost and sign-upFree, none needed
Today's Medium puzzle11/13
Changes every day at 0:00 Japan time.
1Medium starts with writing notes (candidates)
In Medium, there are moments when no cell can be decided at a glance. Then write the digits that might go in each empty cell as small notes.
With notes written, cells with only one candidate come into view. In the row above, the third cell from the right has only 7 as a candidate. Place 7 there, 7 goes from the notes of the other cells too, and the next cell is decided.
Tips for Medium
- Writing notes in all the empty cells at once misses less than adding a few at a time along the way.
- When a digit's candidates line up inside a box, that digit can be removed from the cells of that line outside the box. This is the key when you are stuck in Medium.
Techniques for Medium
2How the levels differ
Levels are set not by how many digits are given at the start, but by the reasoning a puzzle needs.
| Levels and key techniques | Typical time | Clues |
|---|---|---|
| EasyJust find the missing digits | 5 to 20 min | 38 |
| MediumWrite notes (candidates) and narrow down | 15 to 30 min | 30 |
| HardRemove candidates with pairs | 30 min to 1 hr | 27 |
| OniPatterns that span the board, such as the X-Wing | 1 hr or more | 28 |
Hard and Oni start with about the same number of clues (averages of 27.2 and 27.6). Even with many digits, you cannot get far in Oni without finding patterns that span the board, such as the X-Wing.
The game has one more level above Oni, called Master, making 5 levels in all. Master can only be played in the game.
3Medium stages, chapter 1
These are the first 10 puzzles of the game's Medium stages. Chapter 1 is open from the start and free to play. Press a board to open that stage in your browser; the stars you earn stay on the stage.
- 58931683249894251713928437517Stage 1-129 cluesSolve →
- 328128945649513993863194835449Stage 1-230 cluesSolve →
- 986113629976414841856567145376Stage 1-330 cluesSolve →
- 932754892968274761457818628713Stage 1-430 cluesSolve →
- 25727638574439734512782728964Stage 1-529 cluesSolve →
- 32964147214738834896583152876Stage 1-629 cluesSolve →
- 397641818293765352876192862769Stage 1-730 cluesSolve →
- 341172352438726914392486583658Stage 1-830 cluesSolve →
- 688716184738447413724792635396Stage 1-930 cluesSolve →
- 427891957259176274459369767819Stage 1-1030 cluesSolve →
4How to play
- Open a puzzle Press "Solve today's Medium puzzle" and the board opens in your browser. No app or sign-up needed.
- Enter digits Select a cell and press a digit below. With "Notes" you can write small candidates.
- Stuck? Use a hint It does not show the answer straight away. It guides you in steps, starting with where to look.
For the rules and how to solve, with diagrams, see how to solve sudoku, with tips.
5Questions
What ways of solving does Medium use?
On top of the basics, you write out notes (candidates) and remove them when a digit's candidates line up inside a box.
How many Medium puzzles can I play for free?
The 10 stages on this page and the game's Random puzzles at Medium are all free, as many as you like. For printing there are 500 puzzles in all, each with answers.
How do I write notes?
Turn on "Notes" on screen and press a digit to write it small in the corner of the cell. Notes for digits already placed can also be cleared automatically.
How do Medium and Hard differ?
In Medium, writing notes reveals cells with only one candidate. In Hard, you need techniques that use combinations of cells with 2 or 3 candidates to remove candidates from other cells.
Where can I see the answer?
Each puzzle has one answer. If you get stuck, hints teach you how to solve it. For printed puzzles, the answer is on page 2.