How to play
Each number is the length of a run of filled cells in that row or column, in order. 3 1 means a run of three filled cells, then at least one empty cell, then a single filled cell. A 0 means the whole line stays empty.
Fill the cells so that every row and column matches its clue. Every nonogram on PuzzleSheets has exactly one solution, and you can always reach it by logic. You never need to guess.
Difficulty
- Easy (10×10) and Medium (15×15): solvable with the overlap rule alone (see the tips below).
- Hard (15×15) and Expert (20×20): at some point the overlap rule gets stuck, and you need to compare every way a whole line could fit its clue.
Using the player
- Tap or drag to fill cells. A drag stays in one row or column.
- Switch to Cross (or use the right mouse button) to mark cells you know are empty.
- Starting a drag on a cell that already has the mark clears it instead.
- A clue turns grey when its line matches it. Check highlights any mistakes.
- Keyboard: arrow keys move, Space fills, X crosses out, Backspace clears, Ctrl+Z undoes.
- Your progress is saved on this device. Save code / Continue later lets you carry on elsewhere.
Tips
- Overlap. Slide a run as far left as it can go, then as far right. Cells covered in both positions must be filled. A 7 in a 10-cell row always fills the middle four cells.
- Start with big numbers. Long runs and lines whose clues nearly fill the line give the most cells.
- Cross out what can’t be filled. Cells no run can reach stay empty. Crossing them out helps the other direction.
- Count the gaps. The clue numbers plus one gap between each run give the minimum length a line needs.
Printing
Print 1 or 2 nonograms per page on A4 or US Letter, with an optional answer key showing the finished picture.