Mosaic

Mosaic is a pure-logic paint-by-deduction puzzle. Every numbered cell is a clue telling you exactly how many cells in its surrounding 3×3 block (the clue cell included) must be painted. Satisfy every clue at once and the board resolves into a hidden picture.

Work outward from the most constrained clues. A 0 means none of its nine cells are painted; a 9 means all of them are. Use those certainties to chip away at the numbers in between.

• Paint cells black so each clue equals the number of filled cells in its 3×3 area.
• Mark cells you know stay empty so you don't re-test them.
• A clue glows green when its area is exactly satisfied and red when too many cells are painted.
• Finish every clue to reveal the picture and stop the timer.

• Desktop: left-click paints a cell black (click again to clear); right-click marks a cell as definitely empty.
• Phone & tablet: tap to paint a cell; a mouse is handy for the right-click 'empty' marks, best played on a desktop or laptop.

• Daily, everyone gets the same seeded puzzle each day to compare times.
• Practice, fresh random puzzles on demand.
• Three sizes: Easy, Medium, and Hard, with the larger grids holding more clues.

• Start at the edges and corners, those clues cover fewer cells, so they pin down certainties fast.
• A 0 lets you mark all nine surrounding cells empty instantly; a 9 lets you paint them all.
• When two overlapping clues differ by one, the difference tells you the exact state of the cells they don't share.
• Solve faster to keep your score high, the clock subtracts points over time.

Mosaic is a neighbor-count logic puzzle in the paint-the-grid family, where deduction alone reveals a picture with no guessing required. This is an original, free browser version with daily and practice puzzles, playable instantly with no download or sign-up.

A free, original browser game on PlayPendium. No download, no install.