🧩 Mosaic Puzzle

Each clue equals the count of black cells in its 3×3 neighborhood (including itself).

5×5grid

Easymode

0:00time

0moves

Marking: Left click cycles empty → white → black. Right click cycles backward.

Shortcuts: N new, R restart, U undo, H hint, D deduce, F fullscreen.

Night mode Comfortable low-light theme

Highlight errors Show impossible clues while playing

Gray completed clues Dim satisfied clue numbers

Bolder numbers Improves legibility on small screens

Show coordinates Display r,c in each cell

Sound Subtle click feedback

How to Play Mosaic

Goal: mark cells black/white so every clue is satisfied.
Clue meaning: a number equals the count of black cells in the 3×3 neighborhood including itself.
Controls: left click cycles empty → white → black; right click cycles backward.
Tip: use Smart Fill to apply forced moves (safe logic deductions).

Enjoyed the logic? Try our physical interlocking puzzles and brain teasers.