Choose Your Sudoku
We preselected the difficulty "Extreme". You can change it if you want.
- Sudokus available
Difficulty
Extreme
Variant
Classic
Presets
para guardar tus modos de juego favoritos
- Sudokus available
Can we use cookies to anonymously understand how you use the platform and improve it?
We preselected the difficulty "Extreme". You can change it if you want.
Solo Players Now
0
Estimated from recent solo and competitive activity.
Top 3 Players
Solver, Runner, Guest
Filtered by the most relevant variant or difficulty for this page.
Average Time for This Setup
11m 18s
Calculated from completed games with a recorded duration.
Top 3 Countries
US, ES, DE
Filtered by the most relevant variant or difficulty for this page.
Total Games Played
1,600+
Updated from platform play activity.
Players Available for Versus
18
Based on reusable competitive runs and live play availability.
Top 3 Similar Sudokus
3
Selected from boards matching this page's setup.
Best Time for This Setup
5m 19s
Calculated from completed games with a recorded duration.
Board Focus
classic
Classic becomes easier to read when rows, columns and boxes is handled early, after the first scan of rows, columns and boxes in classic at extreme level for level practice.
Pace
extreme
Extreme keeps this attempt comparable without changing the rule.
Progress Value
fewer guesses
A clean result gives your account something meaningful to compare, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
Before changing variant or level, finish one readable classic run, with repeatable training as the practical aim for classic at extreme level for 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 at extreme level for level practice.
Classic rewards a slow opening scan here. Mark candidates after rows, columns and boxes has ruled out the most tempting but illegal placements, after the first scan of rows, columns and boxes in classic at extreme level for level practice.
For anyone who wants a clear difficulty target, the best rhythm is to solve one constraint layer at a time. Classic stays fair when every candidate survives the rule, because classic at extreme level for level practice needs a consistent baseline.
Extreme works when you want pressure without changing the rule family, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
Go harder when several saved attempts feel controlled, while fewer guesses stays tied to classic at extreme level for level practice.
If the board slows down, clean notes instead of adding speculative numbers, with repeatable training as the practical aim for classic at extreme level for level practice.
Keep the attempt when it reflects real solving and can teach something later, with rows, columns and boxes still guiding classic at extreme level for level practice.
Saved results matter most when extreme stays fixed, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
A better solve usually needs fewer corrections before it becomes faster, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
For anyone who wants a clear difficulty target, classic is easiest to read when the first pass separates fixed Sudoku structure from rows, columns and boxes. That keeps changing difficulty before comparing results from becoming the main driver of the solve, before changing away from classic at extreme level for level practice. In classic, that matters because rows, columns and boxes changes the next useful check, because classic at extreme level for level practice needs a consistent baseline.
The middle of a extreme 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, because classic at extreme level for level practice needs a consistent baseline. Classic becomes easier to compare when fewer guesses is tied to the same rule, with rows, columns and boxes still guiding classic at extreme level for level practice.
Notes are worth keeping when they explain why a candidate survived rows, columns and boxes, because classic at extreme level for level practice needs a consistent baseline. In classic, that makes saved history and later comparison easier to trust, with rows, columns and boxes still guiding classic at extreme level for level practice. For this extreme 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, while fewer guesses stays tied to classic at extreme level for level practice.
When the middle game slows down, return to rows, columns and boxes before adding more candidates, with repeatable training as the practical aim for classic at extreme level for level practice.
Classic puts rows, columns and boxes next to saved review, so anyone who wants a clear difficulty target should read the board before chasing speed. With a extreme 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 repeatable training as the practical aim for classic at extreme level for level practice.
Middle-game tempo matters in classic because rows, columns and boxes can change which candidate deserves attention. Anyone who wants a clear difficulty target get more value by keeping repeatable training close to the current grid state. If changing difficulty before comparing results appears, extreme should slow down rather than become a guess.
Use rule pressure as a checkpoint for classic, not as a separate mini-goal. 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 at extreme level for level practice. The attempt is worth comparing only when fewer guesses survives that same rule, before changing away from classic at extreme level for level practice.
A clean classic solve treats candidate hygiene as part of the board language. Anyone who wants a clear difficulty target can then connect rows, columns and boxes, repeatable training and extreme without changing several conditions at once. That makes the next attempt easier to judge, before changing away from classic at extreme level for level practice.
Repeat classic only when the next run has one clear improvement target, after the first scan of rows, columns and boxes in classic at extreme level for level practice.
This changes the next classic board without losing the 9x9 discipline, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
A signal like fewer guesses is easier to read when extreme stays fixed and the board choice does not change, while fewer guesses stays tied to classic at extreme level for level practice.
Use repeatable training as the goal for this attempt and keep notes small enough to explain later, while fewer guesses stays tied to classic at extreme level for level practice.
The useful habit is marking only candidates that survived a unit check: it keeps the solve practical instead of turning into guessing, before changing away from classic at extreme level for level practice.
Repeat classic only when the next run has one clear improvement target, for classic at extreme level for level practice.
Better progress usually means fewer restarts, cleaner notes and a finish that did not need luck, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
Raise the level only when the current board feels controlled for several attempts, before changing away from classic at extreme level for level practice.
Extreme changes the rhythm more than the rule. Aim for a solve you can repeat and compare, after the first scan of rows, columns and boxes in classic at extreme level for level practice.
The Academy lesson explains rows, columns and boxes for classic at a slower pace, after the first scan of rows, columns and boxes in classic at extreme level for level practice. Come back when this extreme board is the right place to apply the idea, because classic at extreme level for level practice needs a consistent baseline.
Do not postpone rows, columns and boxes until the end, because classic at extreme level for level practice needs a consistent baseline. In classic, late rule checks often turn one small miss into several wrong candidates, with rows, columns and boxes still guiding classic at extreme level for level practice.
Loose notes create fake options. Clean them when fewer guesses stops matching what the board actually proves, with rows, columns and boxes still guiding classic at extreme level for level practice.
Changing the aim halfway through weakens the attempt, with rows, columns and boxes still guiding classic at extreme level for level practice. Keep repeatable training stable until the grid is solved or clearly worth abandoning, because classic at extreme level for level practice needs a consistent baseline.
#1
Extreme
Keeping one level makes progress easier to read, with repeatable training as the practical aim for classic at extreme level for level practice.
#2
Fewer Guesses
A finish without guesses is worth saving even if it is slower, while fewer guesses stays tied to classic at extreme level for level practice.
#3
Timing
Compare attempts only when the difficulty stayed the same, before changing away from classic at extreme level for level practice.
#4
History
Saved runs show whether the opening is getting cleaner, for classic at extreme level for level practice.
#5
Level
Move up only when the current pace feels controlled, with rows, columns and boxes still guiding classic at extreme level for level practice.
#1
Next Board
Sudoku Game Hard changes the next board without discarding what you learned in classic.
#2
Next Board
Use Sudoku Game Medium after this extreme 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, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.
#4
Next Board
Sudoku Expert changes the next board without discarding what you learned in classic, because classic at extreme level for level practice needs a consistent baseline.
#5
Next Board
Use Multiplayer Sudoku after this extreme attempt if you want a cleaner comparison.
The point is to make the next extreme move easier to justify, before changing away from classic at extreme level for level practice. Classic still uses ordinary Sudoku units, but rows, columns and boxes changes which candidates deserve attention first, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice. Start there, then confirm every placement through rows, columns and boxes, with repeatable training as the practical aim for classic at extreme level for level practice.
The point is to make the next extreme move easier to justify, for classic at extreme level for level practice. Begin with the clue that affects the most cells, then check the tightest row or box, with repeatable training as the practical aim for classic at extreme level for level practice. That keeps the first notes small enough to manage, while fewer guesses stays tied to classic at extreme level for level practice.
That keeps the advice tied to classic instead of becoming generic, with repeatable training as the practical aim for classic at extreme level for level practice. Look for the place where rows, columns and boxes touches an almost complete unit, while fewer guesses stays tied to classic at extreme level for level practice. If nothing moves, remove speculative notes before adding new ones, before changing away from classic at extreme level for level practice.
Use it as a practical check for fewer guesses, not as a slogan, because classic at extreme level for level practice needs a consistent baseline. Lower it when every move depends on guessing rather than deduction, before changing away from classic at extreme level for level practice. A cleaner lower-level solve usually teaches more than a forced finish, for classic at extreme level for level practice.
The point is to make the next extreme move easier to justify, with repeatable training as the practical aim for classic at extreme level for level practice. Look for fewer guesses, not only a faster clock, for classic at extreme level for level practice. The best sign is a board that reaches the middle game with fewer uncertain notes, with rows, columns and boxes still guiding classic at extreme level for level practice.
That keeps the advice tied to classic instead of becoming generic, because classic at extreme level for level practice needs a consistent baseline. Use the Academy lesson when rows, columns and boxes needs a calmer explanation, with rows, columns and boxes still guiding classic at extreme level for level practice. Then return to the board and test the same idea in play, because classic at extreme level for level practice needs a consistent baseline.
Sudoku Academy lessonUse it as a practical check for fewer guesses, not as a slogan, while fewer guesses stays tied to classic at extreme level for level practice. Choose a nearby board if you want contrast, or repeat this one if the goal is consistency, because classic at extreme level for level practice needs a consistent baseline. Changing rule and level together makes progress harder to read, after the first scan of rows, columns and boxes in classic at extreme level for level practice.
That keeps the advice tied to classic instead of becoming generic, with rows, columns and boxes still guiding classic at extreme level for level practice. No. Start the board first and register only when you want to save history, compare attempts or continue with friends, so marking only candidates that survived a unit check remains visible in classic at extreme level for level practice.