Nonogram
Find the filled runs. Leave room between them. Watch a picture emerge.
Tap to toggle a filled cell. Only incorrect Fill actions count as mistakes; empty marks are notes.
A few numbers. A new picture.
Choose a size and press New Game.
Timing begins with your first effective board action.
Arrows move · Enter / Space apply mode · F Fill · X Mark Empty · Delete / Backspace erase · Right-click empty note. 0 moves.
Numbers sketch the shape.
A clue lists consecutive filled runs. 2, 1 means two filled cells, at least one gap, then one filled cell. A zero clue means the line stays empty. ✓ marks a satisfied line; empty cells are never marked automatically.
Fill marks a picture cell; Mark Empty adds an × note and Erase returns it to unknown. Begin with lines whose largest possible placements overlap, then check the crossing clues. Hint reveals one unresolved cell. Mistakes do not end the game. You win when your filled pattern matches the picture; marking every empty cell is optional.
5 × 5 · Easy, 10 × 10 · Medium, 15 × 15 · Hard. These tiers describe board size, rather than a measured logic rating.
Large boards preserve readable cells and scroll within their own container on small screens.