Guides · Play nonogram

Nonogram puzzles (also called Picross or Griddlers) use numbers along rows and columns to reveal a hidden picture.

Rules

1. Each clue lists the lengths of contiguous filled blocks in that row or column, in order.
2. Blocks of filled cells are separated by at least one empty cell.
3. Mark empties as you go — knowing where a cell cannot be filled is as important as filling.

Solving basics

• If a clue’s blocks are large enough that they must overlap no matter how you slide them, paint the overlap first.
• Complete rows/columns that are fully determined (for example a row of width 10 with clue 10).
• Use completed blocks to push neighboring clues — edge logic is powerful on small boards.
• Never guess early; contradiction checking beats random fills.

Play Nonogram

Try Nonogram — including randomized mode for endless practice.