Free online 15x15 nonogram — hard

A grid ready to play below — tap or click to fill, ✕ to mark blanks. Solvable by pure logic.

Why play hard 15x15?

At 225 cells, the 15×15 demands method: mark the forbidden cells, revisit every line after each find, let the columns confirm the rows. Plan for 20 to 40 minutes depending on density.

On hard, the grid is sparse: every cell is earned, the back-and-forth multiplies, and the advanced techniques — overlap, edge logic — earn their keep on every line.

This page’s grid has 126 filled cells out of 225 (56%) and resolves in 5 propagation passes — verified solvable without ever guessing, like all our grids.

Keep going

• The full game110 pictures + Daily challenge
• Learn to solveinteractive beginner guide
• Step-by-step solverpaste your clues
• Printable 15x156 paper grids
5×5 hardsame difficulty10×10 hardsame difficulty20×20 hardsame difficulty15×15 easysame size15×15 mediumsame size