A nonogram looks like a blank grid with numbers around the edges, and the first one can feel impossible. It isn’t. Every square can be worked out with a few simple rules, and once you know them you’ll never need to guess. This guide explains how to solve nonograms step by step, with the exact tricks that crack most puzzles. Open Nonogram Master free on Gipcus in another tab and try each step as you read.
How nonograms work in 30 seconds
- Each number next to a row (or above a column) is a block of filled squares in that line.
- Several numbers mean several blocks, in that order, with at least one empty square between them. A clue of “3 1” means three filled squares, a gap, then one filled square.
- A clue of “0”, or no clue at all, means the whole line stays empty.
- When every row and column matches its clues, the filled squares reveal a hidden pixel picture.
Nonograms also go by Picross, Griddlers, Hanjie and Japanese crosswords. The rules are the same everywhere.
Step 1: Fill the lines that solve themselves
Add up the clue numbers, then add one for every gap between blocks. If the total equals the line length, there is only one way to place them. In a 10-square row, the clue “3 3 2” needs 3 + 3 + 2 = 8 squares plus 2 gaps, which is exactly 10, so you can fill the whole row at once. A single clue that equals the line length, like “10” in a 10-wide grid, works the same way.
Step 2: Use the overlap trick on big numbers
This is the most useful rule in nonograms. Imagine a block pushed as far left as it can go, then as far right. Any squares it covers in both positions must be filled. In a 10-square row with the clue “7”, the block covers squares 1 to 7 on the left and 4 to 10 on the right, so squares 4, 5, 6 and 7 are certain. A quick shortcut: the number of sure squares is the clue minus the empty space left over (7 minus 3 is 4).
The trick works for rows with several clues too. Slide all the blocks to one end, then the other, and keep only the squares where the same block overlaps itself.
Step 3: Mark empty squares with an X
Beginners usually ignore this, and it’s why they get stuck. As soon as a row’s clues are satisfied, X out every remaining square in that row. Do the same for squares a block can’t possibly reach. In Nonogram Master you right-click to place an X on PC, or switch to X mode on a phone. Those empty marks are what unlock the next row or column.
Step 4: Work from the edges
A filled square on the border of the grid has to be the start (or end) of a block. If the first clue in that row is “4” and square 1 is filled, squares 1 to 4 are filled and square 5 is empty. Edges pin blocks in place faster than anything in the middle.
Step 5: Switch between rows and columns
Each new square you fill or X out is a fresh clue for the line crossing it. After finishing a row, check every column it touches. Solving a nonogram is just this loop: apply the rules to one line, then hop to the lines that changed.
Common nonogram mistakes
- Guessing. A well-made nonogram never needs it. If you’re stuck, there is a line you haven’t fully checked yet.
- Skipping the X marks. Without them, you lose track of which squares are already ruled out.
- Mixing up block order. “2 5” and “5 2” are different lines. The numbers read left to right, and top to bottom for columns.
- Starting with small clues. A “1” tells you almost nothing early on. Begin with the largest numbers.
Are nonograms good for a short break?
Yes. A small grid takes a few minutes, needs no sound, and you can pause anytime, which makes it one of the best quiet puzzles for a work break. See our full list of quiet browser games for a work break and 5-minute games for a lunch break.
More logic puzzles to try after nonograms
- Classic Minesweeper uses the same number-clue deduction, only you’re avoiding mines instead of drawing a picture.
- Water Color Sort is a calmer sorting puzzle when you want a lighter brain workout.
- 2048 is a quick merge puzzle. Read our 2048 corner strategy guide before you start.
Curious about other puzzle styles? Our explainer on mahjong solitaire vs match-3 breaks down another genre people often mix up.
FAQ
Do you ever have to guess in a nonogram? No. A properly designed nonogram has one solution you can reach with logic alone.
What is the best way to start a nonogram? Look for lines that solve themselves, then use the overlap trick on the biggest clues.
What’s the difference between a nonogram and Picross? Nothing in the rules. Picross is a brand name that became popular through Nintendo games; nonogram is the general name.
Can I play nonograms on my phone? Yes. Nonogram Master runs in a mobile browser with a tap mode for filling squares and placing X marks.
