Play Catdoku Online

Catdoku is Sudoku's cozier cousin. Instead of numbers, you are placing cats, and instead of fixed 3×3 boxes, the board is carved into irregular colored regions. The goal is to put exactly one cat in every row, every column, and every colored region — a clean rule set that turns out to hide a satisfying amount of deduction.

What makes it sing is the "Aloof Rule": cats never touch each other, not even diagonally. Every cat you place instantly rules out the eight cells around it, so the board tightens with every move and the next placement gradually becomes forced. It is logic, not luck — every puzzle has a single solution.

The controls are a two-gesture loop. Click or tap a cell once to mark it with an X and rule it out, then double-click or double-tap to place a cat. Those X marks are your working notes, and the trick is filling in enough of them that the remaining cat placements become obvious.

With over 100 handcrafted levels — some versions run past 300 — and grids that grow from about 8×8 up to 10×10, Catdoku scales its challenge nicely. Daily challenges and optional timed levels add replay value, and a mistake system keeps careful players honest by costing a fish for each wrong placement.

Catdoku is a cat-themed logic puzzle developed by ONLYDRK Studio and distributed through the Azgames portal network, reaching players on zapgames.io, Playgama, QGames, and other free browser-game sites. It took the region-placement puzzle formula — one symbol per row, column, and region — and gave it the "Aloof Rule" so cats never touch, even diagonally. The game ships more than 100 handcrafted levels scaling from roughly 8×8 up to 10×10 grids, plus daily challenges, timed levels, and an optional fish-based lives system, with no download or account required.

Target the tightest lines first. Rows, columns, and regions that are nearly full leave the fewest options for their cat, so that is where forced placements live. Whenever a line or region is down to one open cell, its cat is locked in — place it without hesitation.

Squeeze the small regions. Every colored region needs exactly one cat, and a region trapped in a corner often overlaps only one usable cell. When you are stuck, scan the smallest regions on the board; one of them will almost always hand you the next move.

Exploit the Aloof Rule hard. Because cats cannot touch diagonally, a single placement eliminates eight cells at once. Treat each placed cat as a ring of ruled-out cells, not just one filled square, and re-check the neighboring lines and regions every time.

Mark everything you can rule out. Tapping X marks onto impossible cells is not optional busywork — it converts the board into a visual map of what remains, and forced moves that an unmarked board hides become obvious once the dead cells are crossed off.

Be sure before you commit. With the fish-based lives system, a wrong placement costs you, so only double-click a cat when the deduction is airtight. When a board feels ambiguous, you have not found the constraint yet — keep eliminating rather than guessing.

The charm is the hook. Catdoku takes a clean region-placement puzzle and wraps it in cats — and the "Aloof Rule," where cats refuse to sit next to each other, gives the game a personality that a plain numbered grid never had. It is a brain game that is genuinely pleasant to look at.

The deduction is the draw. There is no luck in Catdoku; every board has one solution reachable by pure logic, and the no-touching rule means each move cascades into the next. That steady "aha, that one is forced" rhythm is what keeps a player working through level after level.

And the stakes stay just high enough. The fish-based lives system and optional timed levels add a little pressure without turning it into a twitch game, so Catdoku stays calm but never mindless. If you like cozy logic puzzles with real brain-tickling depth, Catdoku is the one to settle in with.