What is a Nonogram?
A Nonogram is a picture puzzle with numbers beside each row and above each column. Fill cells so the consecutive groups match those clues. Row and column clues describe the same picture from two directions.
Read runs in order
A clue of 3 means one uninterrupted group of three filled cells. A clue of 2, 1 means a group of two, at least one empty cell, then a single filled cell. More than one gap is allowed; groups cannot touch. A zero means no filled cells in that line.
In five cells, the clue 2, 2 has only one arrangement: ■ ■ × ■ ■. The mandatory gap uses the last available space. A clue of 3 in five cells guarantees the middle square is filled, even before you know where the run starts.
Fill, mark and erase
Choose Fill to toggle a square between filled and unknown. Mark Empty toggles an × note. Erase returns a square to unknown. Right-click marks empty on desktop. Arrows move selection; Enter or Space applies your selected mode, F fills, X marks empty, and Delete or Backspace erases.
Incorrect Fill actions add a mistake and show !. They do not end the puzzle. Empty marks are notes, so a misplaced × does not add a mistake. Erasing an error removes its visual marker but keeps the mistake count.
Finishing a line
A satisfied row or column gets a ✓ and crossed-through clues. Unknown empty cells stay under your control; the game never marks them automatically. Completion requires exactly the stored picture’s filled cells. You do not need to mark every empty cell.
Begin with overlaps
Look for large runs and tightly packed groups. Imagine placing a run as far left and as far right as possible. Squares covered in both placements must be filled. Recheck the columns crossing those squares to find more fixed cells.
Keep groups separate
Once a complete run is located, note the squares directly before and after it as empty when they exist. Avoid treating every visible segment as a finished clue: another unknown square may extend it. Check both axes before committing.
Choose a size
5 × 5 is Easy, 10 × 10 is Medium, and 15 × 15 is Hard. These labels describe field size rather than a certified logic rating. Large fields keep readable cells and pan inside the board on small screens, with row clues anchored beside their rows.
Frequently asked questions
Are these puzzles unique or no-guess?
Puzzuno uses original geometric pictures. Their clues are valid, but uniqueness and no-guess solvability are not formally certified. A different filled pattern might satisfy the same clues; completion checking and hints use the stored target picture. Patterns can repeat across dates.
What does Hint do?
Hint resolves one cell to its correct state, choosing the first unresolved cell in row order. It may fill a square or mark it empty. Hint usage appears in your result; no advanced explanation is provided.
What is the Daily size?
The Daily Challenge is 5 × 5. Everyone choosing the same date gets the same picture and clues. Replays award no duplicate completion or Daily reward.
How do saving and records work?
The first effective board action starts active time. Pause conceals the picture and clues; leaving pauses too. Continue excludes offline time. Successful best times are kept separately for each size. Mistakes and hints remain visible in your result.
Progress stays in this browser →