How the daily Cat Sudoku works
The daily Cat Sudoku is selected from an independently created and validated puzzle set. The date determines the same colored regions and solution for every visitor. A new board arrives at 00:00 UTC, which gives friends in different time zones an unambiguous puzzle to compare.
No server account is required. The game stores completion in this browser, so your result stays private to the device and browser profile you used. Clearing local browser storage can remove that record. The daily Cat Sudoku does not claim a global leaderboard or cross-device streak that the site cannot verify.
Daily Cat Sudoku rules
Every daily Cat Sudoku follows four constraints. Place exactly one cat in every row, exactly one in every column, and exactly one in each colored region. Two cats can never touch horizontally, vertically, or diagonally. On this 6×6 board, the finished solution contains six cats and thirty empty or X-marked cells.
One cat per row
A confirmed cat rules out every other square on its horizontal line.
One cat per column
The same placement also rules out every other square in its vertical line.
One cat per color region
Each irregular colored shape must contain one cat, no matter how it bends.
No touching, even diagonally
All eight cells surrounding a confirmed cat are unavailable.
Before you place the first daily Cat Sudoku cat
Scan the smallest colored region and count only legal cells. A cell is legal only when its row, column, and region are still unused and no confirmed cat touches it. Add X marks before cats whenever possible. The marks preserve your reasoning and make the forced placement easier to see.
Do not begin in the visual center merely because it attracts attention. Edge and corner regions often have fewer valid arrangements. If a region has candidates only in one row, that row is reserved for the region even if you do not yet know the exact column.
A five-minute daily Cat Sudoku routine
Minute 1: map the tightest regions
Identify regions with one, two, or three legal cells. Mark any square already blocked by the board’s confirmed placements or by a solved line. The goal is not to fill the board quickly; it is to reduce uncertainty without guessing.
Minutes 2–3: follow each placement
After placing a cat, cross out the rest of its row, column, colored region, and diagonal neighborhood. Then rescan only the areas changed by those marks. One daily Cat Sudoku cat often creates the next forced cell through an adjacency cascade.
Minute 4: use line-locks and pairs
If a region’s candidates all lie in one row or column, reserve that line. If two regions can use only the same two rows, those rows are locked between them. Other regions can be eliminated from both lines without deciding which cat goes where.
Minute 5: sweep the endgame
List the rows and columns that still need cats, then match them to unsolved regions. With only a few placements left, the unused-line checklist is usually clearer than staring at individual cells.
What to do when today’s puzzle feels stuck
First, audit your X marks. Confirm that every placed cat has cleared its full row, column, region, and all diagonal neighbors. Next, look for a region restricted to one line. Then search for a row or column with only one legal cell. These three checks solve most apparent dead ends in the daily Cat Sudoku.
If direct deductions are exhausted, test one candidate mentally. Follow only immediate consequences. If the assumption leaves a region with no legal square, the candidate is impossible and can be marked X. Avoid long speculative chains that are difficult to review.
How to use a daily Cat Sudoku hint well
The hint button reveals one correct cat without charging a heart, showing an ad, or ending the puzzle. Pause after the reveal. Ask which row, column, region, or adjacency pattern forced that position, then mark every square it blocks. The point is to resume solving with new information, not to press hint six times.
If you want to replay for a cleaner time, restart the same board and apply the deduction you just learned. Replaying is a useful way to turn a difficult pattern into a familiar one.
Why a shared daily puzzle is useful
An endless generator offers variety, while the daily Cat Sudoku creates a common reference point. Friends can compare which region they solved first, where a line-lock appeared, or whether they needed a hint without exchanging a copied official level. The shared date also makes a short logic puzzle easier to turn into a routine.
Speed is optional. A careful solve with clear reasons is more valuable than a fast sequence of guesses. The timer is feedback for your own replay, not a public ranking or a claim about skill.
Daily Cat Sudoku FAQ
When does the daily Cat Sudoku change?
The shared puzzle changes at 00:00 UTC. Everyone receives the same board during the same UTC date.
Is the daily Cat Sudoku free?
Yes. It is free in the browser with unlimited undo and hints, no ads, no account, and no download.
Can I replay today’s puzzle?
Yes. Restart clears your current marks and lets you solve the same daily board again.
Does everyone get the same solution?
Yes. The date selects one validated original board with one solution for all players that day.
Do I need to guess?
No. Use rows, columns, colored regions, and the no-touching rule to reach the unique solution by deduction.
Where is my progress saved?
Completion is saved in this browser only. There is no account or cross-device sync.
Build your daily Cat Sudoku skill
Return to the central game for more original difficulties, or use the focused rules and strategy guides.