How to play
- Each number is a run of filled cells in that row or column, in order.
- Runs in the same line have at least one empty cell between them.
- Tap to fill. Right-click, or switch to Cross, to mark a cell you know is empty.
- Drag to paint a whole run at once.
- A clue turns grey when its line matches it. With auto-cross on, each block greys out once your marks pin it, and a finished line crosses its other cells.
Keyboard: arrows move, F fills, X crosses, space uses the tool, C switches it, Delete clears, Shift + arrow paints as you go. Undo is Ctrl + Z, redo Ctrl + Shift + Z (⌘ on a Mac).
Every puzzle solves by logic alone. Start with the overlap trick: where long runs must overlap. More in Learn.
About unlimited nonograms
A 5×5 takes a minute or two. A 10×10 is a proper coffee break, and a 15×15 or 20×20 asks you to chain several deductions across the grid. Hard picks the most demanding of six pictures. Your progress on the current puzzle is saved on this device.