Nonogram, also known as Picross or Griddler, is a captivating logic puzzle where you fill in cells on a grid to reveal a hidden picture. Using only the number clues along each row and column, you must deduce which cells should be filled and which should be left empty. Play Nonogram online free and enjoy puzzles ranging from beginner-friendly 5x5 grids to challenging 10x10 designs. Each puzzle has exactly one solution that can be reached through pure logic — no guessing required. The satisfaction of watching a picture emerge from your deductions is unmatched. Nonograms exercise your logical reasoning, pattern recognition, and spatial thinking. They're the perfect puzzle for anyone who enjoys Sudoku, crosswords, or other brain teasers. Start with small grids to learn the techniques, then challenge yourself with larger, more complex pictures.
How to Play Nonogram
Each row and column has a set of numbers as clues. These numbers tell you the lengths of consecutive filled blocks in that line. For example, "3 1" means there's a group of 3 filled cells, at least one empty cell, then 1 filled cell, in that order.
Left-click or tap a cell to fill it. Right-click or long-press to mark a cell with an X (indicating it must be empty). Use X marks to track cells you've logically eliminated — they're essential for solving harder puzzles.
Start with rows or columns where the clues fill most of the space. A "5" clue on a 5-wide grid means the entire row is filled. Overlap analysis is key: figure out which cells MUST be filled regardless of where the blocks are positioned. Work back and forth between rows and columns as each deduction gives you more information.
Nonogram Tips & Strategies
- Start with the largest clues — they constrain the most cells and give the most information.
- Use overlap analysis: if a block of 4 can only shift 2 positions, the middle cells must be filled.
- Mark empty cells with X — knowing what ISN'T filled is just as important as what is.
- Work back and forth between rows and columns as each new cell narrows possibilities.
- If a row's clues add up to the row width (including minimum gaps), the entire row is determined.
- Never guess — every cell can be deduced with pure logic.
Frequently Asked Questions
How do I solve Nonogram puzzles?
Start by finding rows or columns where the clues leave few possibilities. Use overlap analysis — compare the leftmost and rightmost possible positions of each block to find cells that must be filled. Mark eliminated cells with X. Work back and forth between rows and columns.
What does "3 1 2" mean as a clue?
It means that row (or column) contains exactly three groups of filled cells: one group of 3, then one of 1, then one of 2, in that order, with at least one empty cell between each group.
Is guessing ever required in Nonograms?
No. A properly constructed Nonogram always has a unique solution reachable through pure logic. If you feel stuck, look for a row or column where overlap analysis reveals new cells.
