Crosshatch is a nonogram — a griddler, a paint-by-numbers. The numbers down the side and along the top say how the filled squares run, and working out where they go turns a blank grid into a picture. The work went into the puzzles being fair and into the paper it is all drawn on.
Every picture is solvable by logic alone
Every one. Before a picture reaches the app it is worked through from a blank grid using only forced moves — the ones where the numbers leave no choice — and it has to be the only picture those numbers describe. Just the pictures that pass both go in. Every square you fill, you fill because the numbers said so.
A coloured picture clears that test twice: once with the colours as part of the puzzle, and once with them treated as decoration, because you can play it either way.
Features
- Dozens of pictures across six sets, at 15 × 15, 20 × 20 and 25 × 25. Every one of them yours from the first launch.
- A hint that points: it names the line that can only sit one way and tells you which number to look at. The deduction stays yours, and you can ask as often as you like.
- Three ways to play. Classic is the puzzle as you know it — make your marks, make mistakes, and work them out from the numbers. Guided catches a wrong square as you make it and keeps the count for you. Strict counts your mistakes out: three on a gentle picture, up to seven on a hard one. A new game starts on Classic.
- Undo and redo as far back as you like. A nonogram is a deduction, and you are entitled to revise one.
- Coloured pictures, if you want them, where the colour can be part of the puzzle or just how it comes out.
- Pick your paper. Pinch to zoom on a big grid; the clue numbers stay put at the edge where you can read them.
- Send a finished picture to anyone, as a picture.
- Save everything to a file you keep, and open it on another phone — the pictures you have made, your times, and the board you are half-way through.
- Works offline, and everything it remembers stays on the phone.
- Eleven languages, picked in Settings.
Open it and play
Every size, every difficulty and every picture set is yours the first time you open it, and new pictures arrive in updates, free, for everyone. An ad appears at a break between pictures; one payment removes ads for good, and every picture is free either way.