How to Play Nonograms
Overview
Nonograms (also called Griddlers or Picross) are logic puzzles where you fill in cells on a grid to reveal a hidden picture. Use the number clues to determine which cells to fill and which to leave empty.
Video Tutorial
Rules
- 1Numbers on the left/top show groups of consecutive filled cells in that row/column.
- 2Multiple numbers mean multiple groups, separated by at least one empty cell.
- 3Groups must appear in the order shown.
- 4A clue of 0 means the entire row/column is empty.
Understanding Clues
[3]→3 consecutive filled cells
[2,1]→Group of 2, gap, then group of 1
[0]→Entire row/column is empty
Controls
Left-clickFill or unfill a cell
Right-clickMark cell as empty (×)
Ctrl+ZUndo last action
Solving Strategies
Overlap Method
For large clues, cells that overlap no matter where the block starts must be filled.
Edge Logic
If a block starts at an edge, you can determine its full extent immediately.
Full Lines
When clues plus minimum gaps equal line length, there's only one solution.
Mark Empty Cells
Use × marks to track cells you've determined are empty.