Choose Your Sudoku
We preselected the difficulty "Medium". You can change it if you want.
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Difficulty
Normal
Variant
Classic
Presets
para guardar tus modos de juego favoritos
- Sudokus available
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We preselected the difficulty "Medium". You can change it if you want.
Abandonment Rate
12%
Updated from platform play activity.
Most Popular Variant
Classic Sudoku
Filtered by the variant preselected on this page.
Top 3 Recommended Sudokus
3
Selected from boards matching this page's setup.
Total Games Played
1,600+
Updated from platform play activity.
Average Time for This Setup
8m 24s
Calculated from completed games with a recorded duration.
Total Users
100
Updated from platform play activity.
Total Sudokus Available
4M+
Calculated from the current playable Sudoku inventory.
Top 3 Popular Variants
Killer, Thermo, Arrow
Filtered by the variant preselected on this page.
Board Focus
classic
Classic becomes easier to read when rows, columns and boxes is handled early, with repeatable training as the practical aim for classic with a medium rhythm and level practice.
Pace
medium
Medium keeps this attempt comparable without changing the rule.
Progress Value
fewer guesses
A clean result gives your account something meaningful to compare, while fewer guesses stays tied to classic with a medium rhythm and level practice.
Treat medium as the pace setter for this solve. If writing too many candidates appears, pause and rebuild the note set from the clearest house, while fewer guesses stays tied to classic with a medium rhythm and level practice.
If the middle game slows down, return to rows, columns and boxes and the strongest completed region, while fewer guesses stays tied to classic with a medium rhythm and level practice. That keeps the medium solve from turning into guessing.
Before changing variant or level, finish one readable classic run, with repeatable training as the practical aim for classic with a medium rhythm and level practice. The next comparison is cleaner when marking only candidates that survived a unit check stays consistent, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
Medium works when you want pressure without changing the rule family, while fewer guesses stays tied to classic with a medium rhythm and level practice.
Go harder when several saved attempts feel controlled, for classic with a medium rhythm and level practice.
If the board slows down, clean notes instead of adding speculative numbers, before changing away from classic with a medium rhythm and level practice.
Keep the attempt when it reflects real solving and can teach something later, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice.
Saved results matter most when medium stays fixed, while fewer guesses stays tied to classic with a medium rhythm and level practice.
A better solve usually needs fewer corrections before it becomes faster, while fewer guesses stays tied to classic with a medium rhythm and level practice.
For solvers who want a repeatable pace, classic is easiest to read when the first pass separates fixed Sudoku structure from rows, columns and boxes. That keeps writing too many candidates from becoming the main driver of the solve, with rows, columns and boxes still guiding classic with a medium rhythm and level practice. In classic, that matters because rows, columns and boxes changes the next useful check, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
The middle of a medium attempt should show whether repeatable training is actually being trained. If the board only moves after guesses, the next attempt should start from a cleaner scan, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice. Classic becomes easier to compare when fewer guesses is tied to the same rule, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice.
Notes are worth keeping when they explain why a candidate survived rows, columns and boxes, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice. In classic, that makes saved history and later comparison easier to trust, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice. For this medium route, the practical signal is whether marking only candidates that survived a unit check stays visible.
Is a useful contrast when classic feels clear and you want a different idea, for classic with a medium rhythm and level practice.
When the middle game slows down, return to rows, columns and boxes before adding more candidates, before changing away from classic with a medium rhythm and level practice.
Use saved review as a checkpoint for classic, not as a separate mini-goal, with repeatable training as the practical aim for classic with a medium rhythm and level practice. Rows, columns and boxes tells you where the next proof can start, while marking only candidates that survived a unit check keeps the route readable, for classic with a medium rhythm and level practice. The attempt is worth comparing only when fewer guesses survives that same rule, before changing away from classic with a medium rhythm and level practice.
A clean classic solve treats middle-game tempo as part of the board language, for classic with a medium rhythm and level practice. Solvers who want a repeatable pace can then connect rows, columns and boxes, repeatable training and medium without changing several conditions at once. That makes the next attempt easier to judge, because classic with a medium rhythm and level practice needs a consistent baseline.
Classic puts rows, columns and boxes next to rule pressure, so solvers who want a repeatable pace should read the board before chasing speed. With a medium rhythm, marking only candidates that survived a unit check gives the attempt a stable reference. When fewer guesses is visible, the saved result has a real reason to exist, with rows, columns and boxes still guiding classic with a medium rhythm and level practice.
Candidate hygiene matters in classic because rows, columns and boxes can change which candidate deserves attention. Solvers who want a repeatable pace get more value by keeping repeatable training close to the current grid state. If writing too many candidates appears, medium should slow down rather than become a guess.
Repeat classic only when the next run has one clear improvement target, with repeatable training as the practical aim for classic with a medium rhythm and level practice.
This changes the next classic board without losing the 9x9 discipline, while fewer guesses stays tied to classic with a medium rhythm and level practice.
A signal like fewer guesses is easier to read when medium stays fixed and the board choice does not change, for classic with a medium rhythm and level practice.
Use repeatable training as the goal for this attempt and keep notes small enough to explain later, for classic with a medium rhythm and level practice.
The useful habit is marking only candidates that survived a unit check: it keeps the solve practical instead of turning into guessing, with rows, columns and boxes still guiding classic with a medium rhythm and level practice.
Repeat classic only when the next run has one clear improvement target, because classic with a medium rhythm and level practice needs a consistent baseline.
Better progress usually means fewer restarts, cleaner notes and a finish that did not need luck, while fewer guesses stays tied to classic with a medium rhythm and level practice.
Raise the level only when the current board feels controlled for several attempts, with rows, columns and boxes still guiding classic with a medium rhythm and level practice.
Medium changes the rhythm more than the rule. Aim for a solve you can repeat and compare, with repeatable training as the practical aim for classic with a medium rhythm and level practice.
The Academy lesson explains rows, columns and boxes for classic at a slower pace, with repeatable training as the practical aim for classic with a medium rhythm and level practice. Come back when this medium board is the right place to apply the idea, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
Changing the aim halfway through weakens the attempt, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice. Keep repeatable training stable until the grid is solved or clearly worth abandoning, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice.
When the board narrows, guessing feels efficient but hides the lesson, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice. Return to marking only candidates that survived a unit check and make the next deduction explicit.
In classic, the clue is part of the logic, not decoration, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice. If it conflicts with a normal 9x9 placement, stop before the error spreads, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
#1
Medium
Keeping one level makes progress easier to read, before changing away from classic with a medium rhythm and level practice.
#2
Fewer Guesses
A finish without guesses is worth saving even if it is slower, for classic with a medium rhythm and level practice.
#3
Timing
Compare attempts only when the difficulty stayed the same, with rows, columns and boxes still guiding classic with a medium rhythm and level practice.
#4
History
Saved runs show whether the opening is getting cleaner, because classic with a medium rhythm and level practice needs a consistent baseline.
#5
Level
Move up only when the current pace feels controlled, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice.
#1
Next Board
Online Sudoku Evil changes the next board without discarding what you learned in classic, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
#2
Next Board
Use Sudoku Game Hard after this medium attempt if you want a cleaner comparison.
#3
Next Board
Play Easy Sudoku is a practical next step when repeatable training needs a fresh board, while fewer guesses stays tied to classic with a medium rhythm and level practice.
#4
Next Board
Sudoku Expert changes the next board without discarding what you learned in classic, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
#5
Next Board
Use Multiplayer Sudoku after this medium attempt if you want a cleaner comparison.
The point is to make the next medium move easier to justify, with rows, columns and boxes still guiding classic with a medium rhythm and level practice. Classic still uses ordinary Sudoku units, but rows, columns and boxes changes which candidates deserve attention first, while fewer guesses stays tied to classic with a medium rhythm and level practice. Start there, then confirm every placement through rows, columns and boxes, before changing away from classic with a medium rhythm and level practice.
The point is to make the next medium move easier to justify, because classic with a medium rhythm and level practice needs a consistent baseline. Begin with the clue that affects the most cells, then check the tightest row or box, before changing away from classic with a medium rhythm and level practice. That keeps the first notes small enough to manage, for classic with a medium rhythm and level practice.
That keeps the advice tied to classic instead of becoming generic, before changing away from classic with a medium rhythm and level practice. Look for the place where rows, columns and boxes touches an almost complete unit, for classic with a medium rhythm and level practice. If nothing moves, remove speculative notes before adding new ones, with rows, columns and boxes still guiding classic with a medium rhythm and level practice.
Use it as a practical check for fewer guesses, not as a slogan, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice. Lower it when every move depends on guessing rather than deduction, with rows, columns and boxes still guiding classic with a medium rhythm and level practice. A cleaner lower-level solve usually teaches more than a forced finish, because classic with a medium rhythm and level practice needs a consistent baseline.
The point is to make the next medium move easier to justify, before changing away from classic with a medium rhythm and level practice. Look for fewer guesses, not only a faster clock, because classic with a medium rhythm and level practice needs a consistent baseline. The best sign is a board that reaches the middle game with fewer uncertain notes, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice.
That keeps the advice tied to classic instead of becoming generic, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice. Use the Academy lesson when rows, columns and boxes needs a calmer explanation, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice. Then return to the board and test the same idea in play, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice.
Sudoku Academy lessonUse it as a practical check for fewer guesses, not as a slogan, for classic with a medium rhythm and level practice. Choose a nearby board if you want contrast, or repeat this one if the goal is consistency, so marking only candidates that survived a unit check remains visible in classic with a medium rhythm and level practice. Changing rule and level together makes progress harder to read, with repeatable training as the practical aim for classic with a medium rhythm and level practice.
That keeps the advice tied to classic instead of becoming generic, after the first scan of rows, columns and boxes in classic with a medium rhythm and level practice. No. Start the board first and register only when you want to save history, compare attempts or continue with friends, while fewer guesses stays tied to classic with a medium rhythm and level practice.