15×15 Nonogram
When 10×10 puzzles start to feel routine, the 15×15 grid more than doubles the number of cells and adds longer, more broken clues. Expect a solve to take several minutes or more.
Like every puzzle on this site, each 15×15 grid is generated fresh and verified by a solver, so careful logic always gets you to the end.
Techniques for bigger grids
- Use the thick lines every five cells to count quickly.
- Work edges first: a filled cell at the border fixes where the first block of that line starts.
- After every few moves, scan all lines whose clues are almost satisfied – they often finish with ✕ marks.
- Keep ✕ marks up to date; on larger grids they are your memory.
Playing on a phone
A 15×15 grid is small on a phone screen. Turn your phone sideways or use the Fullscreen button, and use drag-painting to fill or mark long runs in one stroke.
FAQ
Is 15×15 much harder than 10×10?
It has more than twice the cells and more clue combinations, so it takes longer and needs more careful bookkeeping, but uses the same techniques.
Will I need to guess?
No. Every 15×15 puzzle is checked to be solvable line by line.
Are my 15×15 best times saved?
Yes, separately from the other sizes, in your browser's local storage.
Other ways to play: Daily Picross (all modes) · Mini Nonogram (5×5) · Nonogram 10x10 · Picross Online · Griddlers Online · Hanjie Puzzles · How to Solve Nonograms · Nonogram Unblocked
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