One cat per region
Every colored territory needs exactly one cat.
1/6Level 1
DifficultyNormal levels
10/50 unlocked
Start from the locked cat.
Level complete
Level 1 solved.
Every row, column, and color region has one cat.
Cat Sudoku
Cat Sudoku is a cat placement logic puzzle. Put one cat in every colored region, row and column, without letting any two cats touch—even diagonally. Tap once to mark an X, again to place a cat, and once more to clear the cell. Start with Normal, try a larger Hard board, or take on Ultra without a starter cat. Use Hint to spot a useful cell, Undo to take back a move, and Restart to try the same puzzle again. Your progress saves in this browser, so you can return and continue.
Game overview
What is Cat Sudoku?
A spatial logic game with cats and colored territories. Every board has one solution: use the regions, rows, columns and neighboring cells to work out where each cat belongs.
No shared lines
Only one cat may occupy each row and column.
No touching
Cats cannot touch at edges or corners.
Getting started
Controls & interface
First tap: mark X
Keep track of squares where a cat cannot go.
Second tap: place a cat
Tap the same square again to place your cat.
Third tap: clear
Clear a cat or an X to revise your reasoning.
Colored regions
Look for regions with only one possible square.
Hint
Highlight a useful square without filling it for you.
Undo & restart
Take back your last move or reset this board.
Rules & strategy
How to play Cat Sudoku
Find one cat for every color
Start with the smallest region and consider its available squares.
Check the row and column
A placed cat rules out the rest of its row and column.
Check all neighboring squares
The eight squares around a cat cannot hold another cat.
Complete the board
Place all cats legally to solve the level and unlock another.
Keep playing
Choose your next challenge
Normal
50 small 6×6 boards, with one locked starter cat.
Hard
144 larger 8×8 boards, with one locked starter cat.
Ultra
116 boards on a 9×9 grid. Find every cat yourself.
Common questions
Frequently asked questions
Is Cat Sudoku free?
Yes. All levels are free to play in your browser, with no account or download.
Is this classic number Sudoku?
It uses placement logic, but cats and irregular colored regions replace digits and boxes.
What do the red marks mean?
The marked cats share a row, column or region, or are touching. Clear a conflicting cat and try again.
Will my progress be saved?
Yes, when local storage is available. Progress stays in this browser on this device.
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