Question 1

What is a Nonogram?

Accepted Answer

A Nonogram (also called Picross, Griddler or Hanjie) is a logic puzzle. Numbers next to each row and column tell you the lengths of consecutive filled blocks in that line. By combining the row and column clues you deduce which cells to fill to reveal a hidden picture.

Question 2

How do I read the clues?

Accepted Answer

A row clue of 3 1 means there is a block of 3 filled cells, then at least one empty gap, then a block of 1 filled cell, in that order. Each number is a run of consecutive filled cells; runs must be separated by at least one blank cell.

Question 3

Can I mark cells I know are empty?

Accepted Answer

Yes. Switch to Cross mode (or right-click a cell) to mark a cell with an X, meaning you are certain it is blank. This helps you keep track of your deductions without accidentally filling wrong cells.

Question 4

Do the puzzles have a unique solution?

Accepted Answer

Every generated puzzle is designed to be solvable by pure logic — no guessing required. The hidden picture is revealed exactly when all correctly-filled cells match the solution.