Learn Cross Reference Medium — Set 1

A nonogram (also called picross, griddler, or hanjie) is a picture logic puzzle where you fill cells in a grid based on number clues given for each row and column. Solved correctly, the filled cells form a pixel art image.

Start with the longest clues and largest grids — these constrain placement most. Fill cells that must be filled regardless of offset, then use cross-elimination. Our guide covers all beginner techniques step by step.