Catdoku – Play Free Online

More puzzle games

Explore games in the same category and compare their goals before choosing.

• Tap Out

  Clear the board by tapping blocks in the direction their arrows point. Plan the removal order so every piece has a clear path out.

• Hexa Block Puzzle

  Fit the supplied colored pieces into a square grid, planning around their shapes and any fixed obstacles. Complete the board layout across successive levels, with Reset and coin-priced Hint controls available.

• Screw Puzzle

  Relocate screws into open holes to release overlapping boards before the timer runs out. Plan the removal order, preserve usable holes and continue through the level map after completing each puzzle.

• Color Bricks

  Select colored shooters for the four slots below a winding block track. Compare shooter colors and remaining counts with the blocks on the track, and plan selections around the limited slot space.

Rules and Controls

Place one cat in each color region and one in each row and column. Cats cannot touch: check neighboring cells, including diagonals, before placing another cat. The counter above the board tracks placed cats against the required total.

The browser tutorial uses a double tap or double click to place a cat and a single tap or click to mark an empty cell with X. Follow the current in-game prompts if the input behavior changes.

Exclusion Strategy

1. After placing a cat, rule out other cells in its row, column and neighboring positions.
2. Check the rest of that color region because it can contain only one cat.
3. Mark excluded cells with X and look for a row, column or color with only one valid candidate remaining.
4. Before placing the final cat, recheck all three rules rather than relying on an unmarked square alone.

A Worked Example: The Last Cat

In the second screenshot below, count rows from the top and columns from the left. Cats already occupy row 2 column 1, row 3 column 4 and row 4 column 2. That leaves row 1 and column 3 as the only unused row and column, so their intersection is the next candidate.

Row 1 column 3 is also the dark-green region’s only cell. It does not touch any of the three cats, even diagonally. It therefore meets all three rules: one cat per region, one per row and column, and no touching. Double-click or double-tap that cell as the tutorial instructs to place the fourth cat.

Hints and Progress

Open a hint to preview the cells it rules out and read the explanation before choosing Apply. Use the explanation to make your next deduction. Check the badge beside each bottom tool for availability; if a video icon appears, read its prompt before continuing.

Screenshots & Strategies

Real browser captures · October 21, 2026