Guides
Nonogram & picross guides
Guides to nonograms, picross and 3D logic puzzles: how to solve them, solving strategy, puzzle history, and the best apps to play on iPhone.
- Beginner guide
How to Solve Nonograms: A Beginner's Guide with a Worked Example
Learn how to play nonograms (picross) in five minutes: what the numbers mean, the moves that solve most puzzles, and a 5×5 puzzle solved step by step.
Read the guide → - Strategy
Nonogram Strategy: 8 Solving Techniques, from Overlap to Contradiction
8 nonogram techniques experienced solvers use, from the overlap method and slack counting to edge forcing and contradiction, each with a diagram.
Read the guide → - Explainer
What Is a Nonogram? Picross, Griddlers and Hanjie Explained
A nonogram is a picture logic puzzle solved with number clues. How it works, why it's also called picross, griddlers or hanjie, and where it came from.
Read the guide → - 3D puzzles
Picross 3D: The DS Classic, Round 2, and How to Play 3D Picross Today
Picross 3D and Round 2 explained: how the clues work, what the sequel changed, whether it's on Switch, and how to play 3D picross on your phone today.
Read the guide → - App guide
The Best Nonogram and Picross Apps for iPhone (2026)
Five of the best nonogram and picross apps for iPhone in 2026, compared on puzzles, ads, price and offline play, including two 3D picross games.
Read the guide →