It is a logic puzzle where each number is a run of consecutive filled cells in a row or column, in the order shown. You solve it by deduction: if the blocks of a line almost fill it, the middle cells of each block are certain; if a line already matches its clues, the remaining cells are empty. Repeat, alternating between rows and columns, until the picture appears.
Nonogram
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Nonogram
Solve the number clues and reveal a pixel picture. A daily puzzle, a picture library and random games.
Pure logic that reveals a picture
The nonogram (also called Picross, Hanjie, Griddlers or Paint by Numbers) is a grid logic puzzle: the numbers on the edges say how many consecutive cells must be filled in each row and column, and the result is a pixel picture. It was invented independently by Non Ishida and Tetsuya Nishio and became famous with Mario's Picross, released for the Game Boy in 1995. Here you can play the daily puzzle, pick from more than 80 hand-drawn pictures or generate random puzzles from 5×5 to 20×20. Every puzzle goes through a line-logic solver: only puzzles with a unique solution that can be solved without guessing make it into the game. Solving nonograms in general is NP-complete, but puzzles certified by line logic, like these, are fair to players. The difficulty shown comes from the techniques and passes the solver itself needed, not just from the grid size.
Fill in the cells the clues force
- Pick the daily puzzle, a picture from the library or a random one with the size and difficulty you like.
- Use the fill tool for cells that are certainly part of the picture and the X for cells that are certainly empty. Drag to paint a whole line at once.
- When every clue is satisfied, the picture is revealed in color. Your game saves itself, and time, mistakes and help used turn into stars.
Sources and references for this tool
These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.