The numbers give the lengths of the filled runs in each row and column, in order. Fill the right cells to reveal the hidden picture.
Size
Time 0:00
How to play
Each number is a run of consecutive filled cells; multiple numbers on one line are separated by at least one empty cell, in the order shown. Tap to fill a cell; switch to ✖️ mode (or right-click) to mark cells you know are empty — X marks are just notes and never count against you. Start with big numbers and full lines: a "10" fills its whole row, and a "7" on a 10-wide line forces the middle 4 cells. Every puzzle here is generated and verified to be solvable line by line with pure logic, so you never have to guess.
No. The generator only publishes a board after verifying that it can be completed using row-and-column logic alone, which also guarantees the solution is unique. If you are stuck, some line always has a forced cell — re-scan rows and columns you have partially filled.
What do the X marks do?
They are your own notes for cells you have deduced must stay empty. They are never graded and do not affect winning — the puzzle completes as soon as all the correct cells are filled, whether or not you marked any X.
Where should a beginner start?
Start on 5×5 and learn the two core moves: lines whose numbers (plus gaps) fill the whole width, and the overlap trick — a single large number forces its middle cells. Once those feel natural, 8×8 adds longer chains of deduction and 10×10 becomes a satisfying picture reveal.
Where does the name "nonogram" come from?
It honours Non Ishida, a Japanese graphic designer who helped popularise these puzzles in the late 1980s — "Non" plus "-gram" gave nonogram. The same puzzle type appears under many names, including Picross (from Nintendo's games), Hanjie, Griddlers and paint-by-numbers, but the rules are identical everywhere.
What do two or more numbers on one line mean?
They describe separate blocks of filled cells in that exact order, with at least one empty cell between blocks. A clue like "3 1" means a run of three, then a gap of one or more, then a single cell. How far those gaps stretch is exactly what you deduce by cross-checking the columns.
How are nonograms different from Sudoku?
Both are pure-logic puzzles with a single solution, but they exercise different muscles. Sudoku is about placing symbols under constraints, while nonograms are spatial: you reason about runs of cells along two axes at once, and the reward is a small picture emerging instead of a completed number grid.