Free online 20x20 nonogram — medium

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

Why play medium 20x20?

The 20×20 is the nonogram marathon: 400 cells and clue runs that fill the margin. The key is staying systematic — sweep the rows, then the columns, and never guess. One grid can fill an entire evening.

On medium, you’ll alternate between rows and columns more often: deductions come in small touches, and ✕ marks become as precious as filled cells.

This page’s grid has 226 filled cells out of 400 (56%) and resolves in 7 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 20x206 paper grids
5×5 mediumsame difficulty10×10 mediumsame difficulty15×15 mediumsame difficulty20×20 easysame size20×20 hardsame size