What is Meow Sudoku?
Meow Sudoku is a free browser logic puzzle from Inlogic Software s.r.o. It borrows the skeleton of sudoku — exactly one entry in every row and every column — and replaces numbers with cats, adding coloured regions as a third layer of rules. The board is a grid divided into blocks of colour, and your job is to work out the exact cells where the cats belong. Each row gets one cat, each column gets one cat, each colour gets one cat, and no two cats may touch.
That last rule is what makes the puzzle feel different from sudoku. A digit in a sudoku grid only rules out its row, column and box. A cat rules out its neighbours as well, so every placement carves a small empty pocket around itself and narrows the board much faster. The game leans on spatial perception and step-by-step deduction rather than arithmetic; you never add or compare numbers, you simply decide which cells are still possible.
The game is played in the browser and needs no download, install or account. Levels follow one another and grow more demanding, which is where the appeal lies: the rules never change, but the boards ask more of you. If you like this style of puzzle, it sits comfortably alongside the other brain teasers in the Sorting & Logic Puzzles category.
How to Play
Read the board before touching it. Count the rows and the colours; the number of cats you need equals the number of rows, columns and colours, so a board with nine of each will hold nine cats by the time it is finished.
Then begin placing cats where the rules leave no alternative. A cell is safe when its row has no cat, its column has no cat, its colour has no cat, and none of its neighbours contains a cat. Click or tap that cell to drop a cat in place.
Every cat removes options elsewhere: the rest of its row, the rest of its column, the rest of its colour, and the ring of cells around it. Cross those cells off mentally as you go, because most of the puzzle is spent noticing what has just become impossible rather than finding something new.
When you get stuck, the game offers power-ups. According to the in-game instructions, one places a cat for you instantly and another reveals which colour blocks can be discarded. Both are shortcuts around a deduction you have not spotted yet, so they are most valuable on a board that has stalled rather than at the first moment of doubt. Once the grid is filled correctly, the level is complete and you advance to the next one.
Controls
Everything is handled with a single pointer. On a computer, click a cell to select it and place a cat; on a phone or tablet, tap instead. The controls table above lists the inputs. The game’s instructions do not describe any other controls, so if you want to take a cat back, try clicking or tapping it again and see what the game does. A phone or tablet is a reasonable way to play; the only thing you lose is screen space for scanning a large grid.
Beginner Strategy
Start with the tightest colour on the board. Find the coloured region with the fewest cells. If a colour has only a handful of squares, every one of them is a candidate, and the surrounding rows and columns usually decide between them quickly.
Look for a colour that lives entirely inside one row. When all the cells of a colour sit in a single row, that row’s cat must belong to that colour, so every other cell in the row can be eliminated. The same logic works vertically: a colour confined to one column claims that column’s cat.
Then look for intersections. A cell becomes certain when its row, its column and its colour each have exactly one legal spot left, so scan for cells where all three constraints meet. Early boards are usually built so that a few of these single-candidate cells exist from the start; finding them gives you a foothold without guessing.
Finally, respect the buffer. If “cannot touch” includes diagonals — the usual reading in this puzzle family — then a cat blocks all eight cells around it. Beginner mistakes usually come from checking only the four sides and leaving a diagonal neighbour open.
Intermediate Tips
Once the obvious placements are gone, count instead of staring. Take any colour and ask how many rows it touches. If a colour is spread across exactly two rows, one of those two rows must contain that colour’s cat, and the colour cannot appear in any other row. That kind of “this colour belongs to these rows” reasoning unlocks most mid-level boards.
Do the same with columns, then combine the two. A colour that sits inside a two-by-two block of rows and columns is especially strong: it accounts for one cat in each of those lines, which pushes other colours out of the same area.
Keep a mental — or written — list of which colours are already solved. A solved colour still matters, because its cells are dead for every other colour. The same is true of near-solved colours with a single candidate left; those are effectively solved already and should be placed at once.
Consider hypothetical reasoning when counting stalls. Pick the cell with the fewest alternatives, assume a cat there, and follow the consequences for two or three steps. If the assumption creates a row with no legal cell, or forces two cats into one colour, it is wrong, and you have learned something without losing anything. Only commit when the contradiction is clear.
If the game offers boosters, treat the reveal one as a diagnostic: it tells you which colour blocks are no longer worth considering, which is often the same information a careful count would give you. The instant-placement power-up is better saved for the later, denser boards.
Advanced Strategy
The hardest boards reward set-based counting rather than cell-by-cell scanning. Take any group of rows. If the colours that still have candidates in those rows number exactly as many as the rows themselves, those colours must supply all the cats in that group, and every other colour can be removed from those rows. The same argument applies to columns and to mixed groups of rows and columns.
Watch for pair traps. Two colours restricted to the same two rows and the same two columns form a closed unit: two cats, two rows, two columns. Nothing else can enter that block, and anything you were about to place inside it must belong to one of the two colours.
Use “no touching” as a finishing tool. On dense boards, the last few cats often cannot be found by colour logic alone, but a single forced cat will eliminate a diagonal that makes the rest of the board collapse. When two candidates look equally valid, check which one leaves a legal pattern of empty cells around it.
Speed comes from a fixed scan order. Sweep colours, then rows, then columns, place everything forced, and start again. Strong players rarely backtrack because they never place a cat without a reason; if you find yourself undoing often, slow down and recheck the counting steps. Puzzle games of this shape, from Mahjong Master: Tile Sort and Match to number-grid games like 2244 Number Match, reward the same habit: find the forced move before the fast move.
Common Mistakes to Avoid
The most common error is forgetting that the touching rule applies diagonally. If the game rejects a placement that looks fine by row and column, a diagonal neighbour is almost always the reason.
The second is treating the colours as decoration. A board that looks like ordinary sudoku will punish you for ignoring the one-cat-per-colour rule, especially in the middle game where colour counting does most of the work.
Guessing too early is the third. A guess that happens to be right teaches you nothing, and a guess that is wrong can take several moves to notice. If no cell is forced, go back and count rather than trying a spot to see what happens.
Players also waste power-ups on the first difficult moment. A placement you could have deduced yourself is a placement you did not need help with; hold the shortcuts for a board that has genuinely stopped moving.
Finally, do not lose track of what a cat eliminates. Placing a cat clears its row, its column, its colour and its neighbours all at once, and missing any one of those effects leaves dead cells looking alive.
Is Meow Sudoku Right for You?
Meow Sudoku suits players who like sudoku’s structure but want something more visual and a little less number-heavy. The rules fit in a sentence, the boards are readable at a glance, and progress comes from attention rather than memorised patterns, which makes it a good fit for short breaks on a phone as well as longer sessions at a desk.
It is less suitable if you want speed, action or a game that rewards reflexes. This is quiet, deliberate puzzling, and the satisfaction comes from a board clicking into place. If you enjoy untangling a problem at your own pace, the calm rotation puzzles in Ring Unhook make a natural next stop, and the category hub above has more in the same vein.
