Your first round
- Compare each line’s length with the sum of its clues plus the required gaps.
- Fill any complete line or overlap that must be occupied in every valid arrangement.
- Mark proven empty squares with X to separate finished runs.
- Use those filled and empty squares to reconsider the crossing clues, then select Check picture when all lines fit.
Worked example
Overlap a long run
In a five-square line with clue 3, the run could occupy squares 1–3, 2–4 or 3–5. Square 3 belongs to all three placements, so it must be filled even before you know the run’s exact position.
Build your strategy
- For a five-square line with clues 2 2, the only arrangement is two filled, one empty, two filled.
- After completing a run, mark its boundary empty where the clue requires separation.
- Switch between rows and columns rather than trying to finish one direction entirely first.
Common mistakes
- Joining consecutive clue groups without an empty square between them.
- Guessing the intended picture and ignoring a row or column that contradicts it.
Try this next
Solve a 5 × 5 picture using clues alone. Before moving to Medium, identify at least one overlap and one forced gap in your reasoning.
Play Nonogram ↗