Meowdoku Play Meowdoku Online

What is Meowdoku?

Meowdoku is a free cat sudoku-style logic puzzle that you can play online, right in your browser. The board is a square grid cut into colored regions, and every region needs exactly one cat. Like sudoku, there is no luck involved: every level has a single solution, and you can always find it with logic alone.

If you came looking for Meowdoku online (or "Newdoku", as some people call it), you can start right away. There is nothing to download and no account to create. New to the genre? See what cat sudoku is, or the Newdoku page.

How to play Meowdoku

The rules fit in four lines. Put one cat in every row. Put one cat in every column. Put one cat in every color region. And no two cats may touch, not even diagonally. Tap a cell once to mark it with a × (no cat here) and tap again to place a cat. For the controls, keyboard shortcuts and more examples, read the full Meowdoku rules and how to play guide.

Easy, Hard and Expert levels

Meowdoku has 300 levels in three difficulties, 100 levels each, plus a brand-new puzzle every day. Within each difficulty the levels run from gentle to tough, so level 1 is the friendliest and level 100 is the one to brag about.

• Easy (7×7): a gentle start. A sleepy cat is already placed for you, and no level needs more than the region-line trick described below.
• Hard (8×8): a bigger board with one free starter cat. You will need to spot regions that are stuck in a single row or column, and often to test a cell in your head.
• Expert (9×9): no starter cat and a bigger board. Every Expert level needs at least one "what if" step, so bring patience.

Daily puzzle and global leaderboard

Every day there is one new daily Meowdoku puzzle, the same board for everybody in the world. The clock starts the moment you press the start button, and the fastest solvers climb the leaderboard under an automatically assigned cat name, so there is no sign-up. A new puzzle arrives every day at 00:00 UTC.

Meowdoku solver

Stuck, or got a board from somewhere else? The Meowdoku solver lets you paint any board from 4×4 up to 11×11, solves it instantly and can walk you through the reasoning one step at a time. It runs entirely in your browser, so your puzzle is never uploaded.

Meowdoku tips and tricks

1. Start with the smallest region. A region with one or two cells has almost no options, which makes it the best place to begin.
2. Cross out what every cat rules out. A cat blocks its row, its column, its color region and all eight neighbors. Marking those cells with × keeps the board easy to read.
3. Look for a region stuck in one line. If all the open cells of a region sit in the same row, that row's cat must belong to the region, so every other cell in that row can be crossed out. Columns work the same way.
4. Count regions against lines. If two regions live entirely inside the same two rows, those rows are used up, and every other cell in them is empty. This works for three regions and three rows, and so on.
5. Test a cell in your head. If a cat in a cell would leave some row, column or color with nowhere to go, that cell must be empty. This is the main trick on Hard and Expert boards.

More tips come with diagrams on the Meowdoku tips page.

Why play Meowdoku here?

• No ads. No banners and no video ads between levels, just the puzzle.
• Free. Nothing to buy and no account to make.
• Made for phones. Big touch targets, drag to mark a whole line of ×, and a magnifier on 9×9 boards. It also works fine on a computer.
• Nothing to download. It opens instantly in any modern browser, and your progress is saved on your device.
• Friendly to beginners. There are no lives and no penalties. Undo and restart are always free, and hints explain the reasoning instead of only giving the answer.

Meowdoku FAQ