Nonogram

Tap a square to fill it, or drag along a row or column to fill several · Switch to ✕ to mark squares you know are empty

Puzzle: —
Solved: 0

Pictures

Endless

The prompt

Make a nonogram (picture logic) game in one HTML file. Number clues for every row and column, fill and cross modes, drag to paint a whole line, clues that grey out when their line is satisfied, a check button, undo, and saved progress. Draw a set of small pictures and use a line-by-line solver to confirm each one can be solved by logic alone; generate random puzzles the same way.

Claude wrote this game from a short brief like this one. It was then played, tested on phones and tuned before it went up here.

How to play

The numbers beside each row and above each column give the lengths of filled runs in that line, in order.
Runs of filled squares are separated by at least one empty square.
Use ✕ to mark squares you know are empty.
Every puzzle here can be solved by logic alone, with no guessing.

More like this

Nonogram.